/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-19 04:49:32,534 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 04:49:32,535 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 04:49:32,568 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-19 04:49:32,581 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-19 04:49:32,583 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-19 04:49:32,583 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-19 04:49:32,585 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-19 04:49:32,586 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-19 04:49:32,586 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-19 04:49:32,588 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-19 04:49:32,591 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-19 04:49:32,592 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-19 04:49:32,593 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-19 04:49:32,593 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-19 04:49:32,594 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-19 04:49:32,594 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-19 04:49:32,596 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-19 04:49:32,600 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 04:49:32,600 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 04:49:32,602 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 04:49:32,603 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-03-19 04:49:32,609 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 04:49:32,610 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 04:49:32,611 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 04:49:32,611 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-19 04:49:32,611 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 04:49:32,612 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-19 04:49:32,612 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 04:49:32,612 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 04:49:32,612 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 04:49:32,612 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 04:49:32,613 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-19 04:49:32,613 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 04:49:32,613 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 04:49:32,613 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 04:49:32,613 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 04:49:32,613 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 04:49:32,613 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-19 04:49:32,613 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 04:49:32,613 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 04:49:32,613 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 04:49:32,613 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-19 04:49:32,614 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-19 04:49:32,614 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-19 04:49:32,614 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 04:49:32,614 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-19 04:49:32,614 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 04:49:32,794 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 04:49:32,824 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 04:49:32,826 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 04:49:32,827 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 04:49:32,827 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 04:49:32,828 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_unwindbound20.c [2022-03-19 04:49:32,869 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33e204803/e6979b678ee74c2c944afd753b67570b/FLAG63ab2e8e2 [2022-03-19 04:49:33,217 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 04:49:33,218 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_unwindbound20.c [2022-03-19 04:49:33,224 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33e204803/e6979b678ee74c2c944afd753b67570b/FLAG63ab2e8e2 [2022-03-19 04:49:33,635 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33e204803/e6979b678ee74c2c944afd753b67570b [2022-03-19 04:49:33,637 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 04:49:33,638 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 04:49:33,638 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 04:49:33,639 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 04:49:33,642 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 04:49:33,642 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 04:49:33" (1/1) ... [2022-03-19 04:49:33,643 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@161f68be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:49:33, skipping insertion in model container [2022-03-19 04:49:33,643 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 04:49:33" (1/1) ... [2022-03-19 04:49:33,647 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 04:49:33,658 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 04:49:33,792 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/fermat1-ll_unwindbound20.c[535,548] [2022-03-19 04:49:33,818 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 04:49:33,823 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 04:49:33,831 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/fermat1-ll_unwindbound20.c[535,548] [2022-03-19 04:49:33,837 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 04:49:33,846 INFO L208 MainTranslator]: Completed translation [2022-03-19 04:49:33,846 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:49:33 WrapperNode [2022-03-19 04:49:33,847 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 04:49:33,847 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 04:49:33,847 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 04:49:33,847 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 04:49:33,863 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:49:33" (1/1) ... [2022-03-19 04:49:33,864 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:49:33" (1/1) ... [2022-03-19 04:49:33,868 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:49:33" (1/1) ... [2022-03-19 04:49:33,868 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:49:33" (1/1) ... [2022-03-19 04:49:33,871 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:49:33" (1/1) ... [2022-03-19 04:49:33,873 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:49:33" (1/1) ... [2022-03-19 04:49:33,874 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:49:33" (1/1) ... [2022-03-19 04:49:33,875 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 04:49:33,875 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 04:49:33,875 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 04:49:33,875 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 04:49:33,883 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:49:33" (1/1) ... [2022-03-19 04:49:33,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 04:49:33,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:49:33,914 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) [2022-03-19 04:49:33,931 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 [2022-03-19 04:49:33,947 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 04:49:33,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 04:49:33,948 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 04:49:33,948 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-19 04:49:33,948 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 04:49:33,948 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 04:49:33,948 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 04:49:33,948 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 04:49:33,949 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 04:49:33,949 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 04:49:33,949 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-19 04:49:33,949 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-19 04:49:33,950 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 04:49:33,950 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 04:49:33,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 04:49:33,950 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 04:49:33,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 04:49:33,950 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 04:49:33,950 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 04:49:33,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 04:49:33,992 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 04:49:33,993 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 04:49:34,146 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 04:49:34,150 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 04:49:34,150 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-03-19 04:49:34,157 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 04:49:34 BoogieIcfgContainer [2022-03-19 04:49:34,157 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 04:49:34,160 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 04:49:34,160 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 04:49:34,167 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 04:49:34,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 04:49:33" (1/3) ... [2022-03-19 04:49:34,168 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b8d7907 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 04:49:34, skipping insertion in model container [2022-03-19 04:49:34,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:49:33" (2/3) ... [2022-03-19 04:49:34,168 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b8d7907 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 04:49:34, skipping insertion in model container [2022-03-19 04:49:34,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 04:49:34" (3/3) ... [2022-03-19 04:49:34,169 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat1-ll_unwindbound20.c [2022-03-19 04:49:34,173 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-19 04:49:34,173 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 04:49:34,201 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 04:49:34,205 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 [2022-03-19 04:49:34,205 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 04:49:34,214 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-19 04:49:34,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-19 04:49:34,232 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:49:34,233 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:49:34,233 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:49:34,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:49:34,236 INFO L85 PathProgramCache]: Analyzing trace with hash 928708300, now seen corresponding path program 1 times [2022-03-19 04:49:34,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:49:34,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1227084845] [2022-03-19 04:49:34,253 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:49:34,253 INFO L85 PathProgramCache]: Analyzing trace with hash 928708300, now seen corresponding path program 2 times [2022-03-19 04:49:34,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:49:34,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465313698] [2022-03-19 04:49:34,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:49:34,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:49:34,334 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:49:34,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1599139323] [2022-03-19 04:49:34,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:49:34,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:49:34,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:49:34,352 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) [2022-03-19 04:49:34,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 04:49:34,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-19 04:49:34,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:49:34,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 1 conjunts are in the unsatisfiable core [2022-03-19 04:49:34,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:49:34,457 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 04:49:34,458 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 04:49:34,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:49:34,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465313698] [2022-03-19 04:49:34,458 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:49:34,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599139323] [2022-03-19 04:49:34,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599139323] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:49:34,459 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:49:34,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-19 04:49:34,461 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:49:34,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1227084845] [2022-03-19 04:49:34,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1227084845] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:49:34,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:49:34,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-19 04:49:34,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249269973] [2022-03-19 04:49:34,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:49:34,465 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-03-19 04:49:34,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:49:34,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-03-19 04:49:34,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-03-19 04:49:34,483 INFO L87 Difference]: Start difference. First operand has 37 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 04:49:34,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:49:34,497 INFO L93 Difference]: Finished difference Result 67 states and 100 transitions. [2022-03-19 04:49:34,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-03-19 04:49:34,498 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2022-03-19 04:49:34,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:49:34,502 INFO L225 Difference]: With dead ends: 67 [2022-03-19 04:49:34,503 INFO L226 Difference]: Without dead ends: 32 [2022-03-19 04:49:34,504 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-03-19 04:49:34,506 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 04:49:34,507 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 04:49:34,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-19 04:49:34,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-19 04:49:34,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-19 04:49:34,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-03-19 04:49:34,530 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 22 [2022-03-19 04:49:34,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:49:34,531 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-03-19 04:49:34,531 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 04:49:34,531 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-03-19 04:49:34,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-19 04:49:34,533 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:49:34,533 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:49:34,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-19 04:49:34,749 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-03-19 04:49:34,750 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:49:34,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:49:34,750 INFO L85 PathProgramCache]: Analyzing trace with hash -155606603, now seen corresponding path program 1 times [2022-03-19 04:49:34,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:49:34,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [163532638] [2022-03-19 04:49:34,751 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:49:34,752 INFO L85 PathProgramCache]: Analyzing trace with hash -155606603, now seen corresponding path program 2 times [2022-03-19 04:49:34,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:49:34,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157212433] [2022-03-19 04:49:34,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:49:34,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:49:34,773 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:49:34,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [597583580] [2022-03-19 04:49:34,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:49:34,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:49:34,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:49:34,786 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) [2022-03-19 04:49:34,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 04:49:34,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-19 04:49:34,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:49:34,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-19 04:49:34,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:49:34,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:49:34,930 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 04:49:34,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:49:34,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157212433] [2022-03-19 04:49:34,930 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:49:34,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597583580] [2022-03-19 04:49:34,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597583580] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:49:34,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:49:34,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 04:49:34,931 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:49:34,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [163532638] [2022-03-19 04:49:34,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [163532638] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:49:34,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:49:34,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 04:49:34,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895391681] [2022-03-19 04:49:34,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:49:34,932 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 04:49:34,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:49:34,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 04:49:34,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 04:49:34,933 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 04:49:34,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:49:34,947 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2022-03-19 04:49:34,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 04:49:34,947 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-03-19 04:49:34,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:49:34,948 INFO L225 Difference]: With dead ends: 41 [2022-03-19 04:49:34,948 INFO L226 Difference]: Without dead ends: 34 [2022-03-19 04:49:34,948 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 04:49:34,949 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 04:49:34,950 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 101 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 04:49:34,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-03-19 04:49:34,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-03-19 04:49:34,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-19 04:49:34,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2022-03-19 04:49:34,955 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 23 [2022-03-19 04:49:34,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:49:34,956 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2022-03-19 04:49:34,956 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 04:49:34,957 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2022-03-19 04:49:34,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-19 04:49:34,957 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:49:34,957 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:49:34,983 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-19 04:49:35,159 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-03-19 04:49:35,160 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:49:35,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:49:35,160 INFO L85 PathProgramCache]: Analyzing trace with hash -153938307, now seen corresponding path program 1 times [2022-03-19 04:49:35,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:49:35,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [708269587] [2022-03-19 04:49:35,161 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:49:35,161 INFO L85 PathProgramCache]: Analyzing trace with hash -153938307, now seen corresponding path program 2 times [2022-03-19 04:49:35,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:49:35,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465979239] [2022-03-19 04:49:35,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:49:35,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:49:35,181 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:49:35,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1597548318] [2022-03-19 04:49:35,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:49:35,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:49:35,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:49:35,196 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) [2022-03-19 04:49:35,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-19 04:49:35,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-19 04:49:35,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:49:35,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-19 04:49:35,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:49:35,449 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:49:35,450 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 04:49:35,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:49:35,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465979239] [2022-03-19 04:49:35,450 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:49:35,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597548318] [2022-03-19 04:49:35,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597548318] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:49:35,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:49:35,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 04:49:35,451 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:49:35,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [708269587] [2022-03-19 04:49:35,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [708269587] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:49:35,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:49:35,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 04:49:35,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45842150] [2022-03-19 04:49:35,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:49:35,452 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 04:49:35,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:49:35,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 04:49:35,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 04:49:35,453 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 04:49:38,062 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 04:49:40,099 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 [] [2022-03-19 04:49:40,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:49:40,122 INFO L93 Difference]: Finished difference Result 53 states and 70 transitions. [2022-03-19 04:49:40,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 04:49:40,122 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2022-03-19 04:49:40,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:49:40,124 INFO L225 Difference]: With dead ends: 53 [2022-03-19 04:49:40,124 INFO L226 Difference]: Without dead ends: 51 [2022-03-19 04:49:40,124 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 04:49:40,125 INFO L912 BasicCegarLoop]: 33 mSDtfsCounter, 16 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-03-19 04:49:40,125 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 126 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 1 Unknown, 0 Unchecked, 4.6s Time] [2022-03-19 04:49:40,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-19 04:49:40,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-03-19 04:49:40,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 35 states have internal predecessors, (47), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-19 04:49:40,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 67 transitions. [2022-03-19 04:49:40,135 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 67 transitions. Word has length 23 [2022-03-19 04:49:40,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:49:40,135 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 67 transitions. [2022-03-19 04:49:40,135 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 04:49:40,135 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 67 transitions. [2022-03-19 04:49:40,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-19 04:49:40,136 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:49:40,136 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:49:40,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-19 04:49:40,353 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:49:40,354 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:49:40,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:49:40,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1676885497, now seen corresponding path program 1 times [2022-03-19 04:49:40,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:49:40,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1153347101] [2022-03-19 04:49:40,355 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:49:40,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1676885497, now seen corresponding path program 2 times [2022-03-19 04:49:40,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:49:40,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709993656] [2022-03-19 04:49:40,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:49:40,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:49:40,363 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:49:40,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1724987153] [2022-03-19 04:49:40,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:49:40,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:49:40,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:49:40,369 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) [2022-03-19 04:49:40,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-19 04:49:40,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:49:40,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:49:40,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-19 04:49:40,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:49:40,494 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:49:40,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:49:40,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:49:40,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:49:40,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709993656] [2022-03-19 04:49:40,598 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:49:40,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724987153] [2022-03-19 04:49:40,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724987153] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:49:40,598 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:49:40,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-03-19 04:49:40,598 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:49:40,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1153347101] [2022-03-19 04:49:40,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1153347101] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:49:40,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:49:40,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 04:49:40,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634568036] [2022-03-19 04:49:40,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:49:40,599 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 04:49:40,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:49:40,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 04:49:40,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-03-19 04:49:40,600 INFO L87 Difference]: Start difference. First operand 50 states and 67 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-19 04:49:40,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:49:40,673 INFO L93 Difference]: Finished difference Result 57 states and 73 transitions. [2022-03-19 04:49:40,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 04:49:40,673 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2022-03-19 04:49:40,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:49:40,674 INFO L225 Difference]: With dead ends: 57 [2022-03-19 04:49:40,674 INFO L226 Difference]: Without dead ends: 52 [2022-03-19 04:49:40,674 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-03-19 04:49:40,675 INFO L912 BasicCegarLoop]: 29 mSDtfsCounter, 24 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 04:49:40,675 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 175 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 04:49:40,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-19 04:49:40,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 36. [2022-03-19 04:49:40,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 8 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-19 04:49:40,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2022-03-19 04:49:40,683 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 29 [2022-03-19 04:49:40,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:49:40,684 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2022-03-19 04:49:40,684 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-19 04:49:40,684 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2022-03-19 04:49:40,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-19 04:49:40,685 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:49:40,685 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:49:40,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-19 04:49:40,911 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:49:40,911 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:49:40,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:49:40,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1154059858, now seen corresponding path program 1 times [2022-03-19 04:49:40,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:49:40,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1499408409] [2022-03-19 04:49:40,912 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:49:40,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1154059858, now seen corresponding path program 2 times [2022-03-19 04:49:40,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:49:40,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992907840] [2022-03-19 04:49:40,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:49:40,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:49:40,920 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:49:40,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1234552803] [2022-03-19 04:49:40,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:49:40,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:49:40,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:49:40,921 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) [2022-03-19 04:49:40,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-19 04:49:41,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:49:41,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:49:41,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 04:49:41,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:49:41,154 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:49:41,155 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 04:49:41,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:49:41,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992907840] [2022-03-19 04:49:41,155 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:49:41,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234552803] [2022-03-19 04:49:41,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234552803] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:49:41,155 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:49:41,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 04:49:41,155 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:49:41,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1499408409] [2022-03-19 04:49:41,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1499408409] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:49:41,156 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:49:41,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 04:49:41,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499210351] [2022-03-19 04:49:41,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:49:41,156 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 04:49:41,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:49:41,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 04:49:41,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-19 04:49:41,157 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-19 04:49:41,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:49:41,182 INFO L93 Difference]: Finished difference Result 65 states and 79 transitions. [2022-03-19 04:49:41,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 04:49:41,182 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 35 [2022-03-19 04:49:41,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:49:41,183 INFO L225 Difference]: With dead ends: 65 [2022-03-19 04:49:41,183 INFO L226 Difference]: Without dead ends: 44 [2022-03-19 04:49:41,184 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-19 04:49:41,184 INFO L912 BasicCegarLoop]: 38 mSDtfsCounter, 6 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 04:49:41,184 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 120 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 04:49:41,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-19 04:49:41,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-03-19 04:49:41,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 9 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-19 04:49:41,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2022-03-19 04:49:41,193 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 35 [2022-03-19 04:49:41,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:49:41,193 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2022-03-19 04:49:41,193 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-19 04:49:41,193 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2022-03-19 04:49:41,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-19 04:49:41,194 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:49:41,194 INFO L500 BasicCegarLoop]: trace histogram [3, 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] [2022-03-19 04:49:41,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-19 04:49:41,416 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:49:41,416 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:49:41,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:49:41,417 INFO L85 PathProgramCache]: Analyzing trace with hash -174895632, now seen corresponding path program 1 times [2022-03-19 04:49:41,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:49:41,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [59303392] [2022-03-19 04:49:41,417 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:49:41,417 INFO L85 PathProgramCache]: Analyzing trace with hash -174895632, now seen corresponding path program 2 times [2022-03-19 04:49:41,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:49:41,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635918555] [2022-03-19 04:49:41,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:49:41,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:49:41,425 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:49:41,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1142530478] [2022-03-19 04:49:41,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:49:41,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:49:41,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:49:41,434 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) [2022-03-19 04:49:41,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-19 04:49:41,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:49:41,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:49:41,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 04:49:41,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:49:41,539 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:49:41,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:49:41,623 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-19 04:49:41,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:49:41,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635918555] [2022-03-19 04:49:41,624 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:49:41,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142530478] [2022-03-19 04:49:41,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142530478] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-19 04:49:41,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-19 04:49:41,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-03-19 04:49:41,624 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:49:41,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [59303392] [2022-03-19 04:49:41,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [59303392] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:49:41,625 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:49:41,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 04:49:41,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78517688] [2022-03-19 04:49:41,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:49:41,625 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 04:49:41,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:49:41,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 04:49:41,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-19 04:49:41,626 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 04:49:41,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:49:41,686 INFO L93 Difference]: Finished difference Result 74 states and 89 transitions. [2022-03-19 04:49:41,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 04:49:41,688 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 41 [2022-03-19 04:49:41,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:49:41,690 INFO L225 Difference]: With dead ends: 74 [2022-03-19 04:49:41,690 INFO L226 Difference]: Without dead ends: 53 [2022-03-19 04:49:41,690 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-19 04:49:41,693 INFO L912 BasicCegarLoop]: 38 mSDtfsCounter, 22 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 04:49:41,693 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 125 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 04:49:41,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-03-19 04:49:41,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2022-03-19 04:49:41,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 states have internal predecessors, (42), 10 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-19 04:49:41,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2022-03-19 04:49:41,710 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 41 [2022-03-19 04:49:41,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:49:41,710 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2022-03-19 04:49:41,710 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 04:49:41,710 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2022-03-19 04:49:41,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-19 04:49:41,715 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:49:41,716 INFO L500 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2022-03-19 04:49:41,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-19 04:49:41,931 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:49:41,932 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:49:41,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:49:41,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1292932747, now seen corresponding path program 1 times [2022-03-19 04:49:41,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:49:41,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1725259003] [2022-03-19 04:49:41,933 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:49:41,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1292932747, now seen corresponding path program 2 times [2022-03-19 04:49:41,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:49:41,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229364334] [2022-03-19 04:49:41,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:49:41,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:49:41,944 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:49:41,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [99809066] [2022-03-19 04:49:41,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:49:41,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:49:41,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:49:41,956 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) [2022-03-19 04:49:41,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-19 04:49:41,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:49:41,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:49:41,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 04:49:41,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:49:42,080 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:49:42,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:49:42,162 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-19 04:49:42,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:49:42,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229364334] [2022-03-19 04:49:42,163 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:49:42,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99809066] [2022-03-19 04:49:42,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99809066] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:49:42,163 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:49:42,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-03-19 04:49:42,163 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:49:42,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1725259003] [2022-03-19 04:49:42,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1725259003] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:49:42,163 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:49:42,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 04:49:42,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99782967] [2022-03-19 04:49:42,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:49:42,164 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 04:49:42,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:49:42,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 04:49:42,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-19 04:49:42,164 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 04:49:42,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:49:42,200 INFO L93 Difference]: Finished difference Result 75 states and 90 transitions. [2022-03-19 04:49:42,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 04:49:42,201 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 43 [2022-03-19 04:49:42,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:49:42,202 INFO L225 Difference]: With dead ends: 75 [2022-03-19 04:49:42,202 INFO L226 Difference]: Without dead ends: 54 [2022-03-19 04:49:42,202 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-03-19 04:49:42,203 INFO L912 BasicCegarLoop]: 38 mSDtfsCounter, 9 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 04:49:42,203 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 125 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 04:49:42,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-19 04:49:42,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-03-19 04:49:42,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 38 states have internal predecessors, (44), 10 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-19 04:49:42,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2022-03-19 04:49:42,222 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 43 [2022-03-19 04:49:42,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:49:42,222 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2022-03-19 04:49:42,222 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 04:49:42,222 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2022-03-19 04:49:42,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-19 04:49:42,224 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:49:42,224 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 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, 1, 1, 1, 1, 1] [2022-03-19 04:49:42,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-19 04:49:42,439 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:49:42,440 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:49:42,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:49:42,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1407897436, now seen corresponding path program 1 times [2022-03-19 04:49:42,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:49:42,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1365068794] [2022-03-19 04:49:42,441 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:49:42,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1407897436, now seen corresponding path program 2 times [2022-03-19 04:49:42,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:49:42,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954045095] [2022-03-19 04:49:42,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:49:42,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:49:42,463 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:49:42,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2058966149] [2022-03-19 04:49:42,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:49:42,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:49:42,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:49:42,477 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) [2022-03-19 04:49:42,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-19 04:49:42,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:49:42,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:49:42,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-19 04:49:42,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:49:42,627 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-19 04:49:42,627 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 04:49:42,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:49:42,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954045095] [2022-03-19 04:49:42,628 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:49:42,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058966149] [2022-03-19 04:49:42,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058966149] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:49:42,628 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:49:42,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 04:49:42,628 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:49:42,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1365068794] [2022-03-19 04:49:42,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1365068794] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:49:42,628 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:49:42,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 04:49:42,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750823503] [2022-03-19 04:49:42,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:49:42,629 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 04:49:42,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:49:42,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 04:49:42,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-19 04:49:42,629 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-19 04:49:42,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:49:42,682 INFO L93 Difference]: Finished difference Result 101 states and 131 transitions. [2022-03-19 04:49:42,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 04:49:42,682 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 47 [2022-03-19 04:49:42,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:49:42,683 INFO L225 Difference]: With dead ends: 101 [2022-03-19 04:49:42,683 INFO L226 Difference]: Without dead ends: 80 [2022-03-19 04:49:42,683 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-19 04:49:42,684 INFO L912 BasicCegarLoop]: 60 mSDtfsCounter, 19 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 04:49:42,684 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 107 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 04:49:42,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-03-19 04:49:42,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 70. [2022-03-19 04:49:42,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 50 states have (on average 1.22) internal successors, (61), 50 states have internal predecessors, (61), 14 states have call successors, (14), 7 states have call predecessors, (14), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-19 04:49:42,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 87 transitions. [2022-03-19 04:49:42,712 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 87 transitions. Word has length 47 [2022-03-19 04:49:42,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:49:42,712 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 87 transitions. [2022-03-19 04:49:42,712 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-19 04:49:42,712 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 87 transitions. [2022-03-19 04:49:42,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-19 04:49:42,712 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:49:42,713 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 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] [2022-03-19 04:49:42,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-19 04:49:42,928 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-03-19 04:49:42,929 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:49:42,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:49:42,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1915058849, now seen corresponding path program 1 times [2022-03-19 04:49:42,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:49:42,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1665476241] [2022-03-19 04:49:42,930 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:49:42,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1915058849, now seen corresponding path program 2 times [2022-03-19 04:49:42,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:49:42,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907574549] [2022-03-19 04:49:42,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:49:42,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:49:42,941 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:49:42,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [399064905] [2022-03-19 04:49:42,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:49:42,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:49:42,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:49:42,956 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) [2022-03-19 04:49:42,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-19 04:49:42,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:49:42,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:49:42,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-19 04:49:42,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:49:43,084 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:49:43,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:49:43,178 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-19 04:49:43,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:49:43,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907574549] [2022-03-19 04:49:43,179 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:49:43,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399064905] [2022-03-19 04:49:43,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399064905] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:49:43,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:49:43,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-03-19 04:49:43,180 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:49:43,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1665476241] [2022-03-19 04:49:43,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1665476241] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:49:43,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:49:43,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 04:49:43,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259317034] [2022-03-19 04:49:43,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:49:43,180 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 04:49:43,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:49:43,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 04:49:43,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-03-19 04:49:43,181 INFO L87 Difference]: Start difference. First operand 70 states and 87 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-19 04:49:43,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:49:43,236 INFO L93 Difference]: Finished difference Result 118 states and 153 transitions. [2022-03-19 04:49:43,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 04:49:43,236 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 49 [2022-03-19 04:49:43,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:49:43,237 INFO L225 Difference]: With dead ends: 118 [2022-03-19 04:49:43,237 INFO L226 Difference]: Without dead ends: 81 [2022-03-19 04:49:43,238 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2022-03-19 04:49:43,238 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 22 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 04:49:43,238 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 134 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 04:49:43,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-03-19 04:49:43,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2022-03-19 04:49:43,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 57 states have (on average 1.2105263157894737) internal successors, (69), 57 states have internal predecessors, (69), 16 states have call successors, (16), 8 states have call predecessors, (16), 6 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-19 04:49:43,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 99 transitions. [2022-03-19 04:49:43,250 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 99 transitions. Word has length 49 [2022-03-19 04:49:43,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:49:43,250 INFO L478 AbstractCegarLoop]: Abstraction has 80 states and 99 transitions. [2022-03-19 04:49:43,250 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-19 04:49:43,250 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 99 transitions. [2022-03-19 04:49:43,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-19 04:49:43,250 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:49:43,251 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 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] [2022-03-19 04:49:43,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-19 04:49:43,476 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:49:43,476 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:49:43,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:49:43,476 INFO L85 PathProgramCache]: Analyzing trace with hash -60460648, now seen corresponding path program 3 times [2022-03-19 04:49:43,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:49:43,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1132053882] [2022-03-19 04:49:43,477 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:49:43,477 INFO L85 PathProgramCache]: Analyzing trace with hash -60460648, now seen corresponding path program 4 times [2022-03-19 04:49:43,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:49:43,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065960673] [2022-03-19 04:49:43,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:49:43,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:49:43,483 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:49:43,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1338901815] [2022-03-19 04:49:43,483 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:49:43,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:49:43,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:49:43,484 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) [2022-03-19 04:49:43,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-19 04:49:43,543 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:49:43,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:49:43,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-19 04:49:43,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:49:43,635 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:49:43,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:49:43,730 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-19 04:49:43,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:49:43,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065960673] [2022-03-19 04:49:43,730 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:49:43,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338901815] [2022-03-19 04:49:43,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338901815] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:49:43,731 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:49:43,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-03-19 04:49:43,731 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:49:43,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1132053882] [2022-03-19 04:49:43,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1132053882] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:49:43,731 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:49:43,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 04:49:43,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918943841] [2022-03-19 04:49:43,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:49:43,732 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 04:49:43,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:49:43,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 04:49:43,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-03-19 04:49:43,732 INFO L87 Difference]: Start difference. First operand 80 states and 99 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-19 04:49:43,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:49:43,804 INFO L93 Difference]: Finished difference Result 119 states and 154 transitions. [2022-03-19 04:49:43,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 04:49:43,804 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 51 [2022-03-19 04:49:43,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:49:43,805 INFO L225 Difference]: With dead ends: 119 [2022-03-19 04:49:43,805 INFO L226 Difference]: Without dead ends: 82 [2022-03-19 04:49:43,805 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2022-03-19 04:49:43,805 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 23 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 04:49:43,806 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 121 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 04:49:43,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-03-19 04:49:43,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2022-03-19 04:49:43,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 59 states have (on average 1.2033898305084745) internal successors, (71), 59 states have internal predecessors, (71), 16 states have call successors, (16), 8 states have call predecessors, (16), 6 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-19 04:49:43,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 101 transitions. [2022-03-19 04:49:43,817 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 101 transitions. Word has length 51 [2022-03-19 04:49:43,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:49:43,817 INFO L478 AbstractCegarLoop]: Abstraction has 82 states and 101 transitions. [2022-03-19 04:49:43,817 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-19 04:49:43,817 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 101 transitions. [2022-03-19 04:49:43,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-19 04:49:43,817 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:49:43,817 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 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] [2022-03-19 04:49:43,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-19 04:49:44,033 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-19 04:49:44,033 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:49:44,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:49:44,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1067781299, now seen corresponding path program 1 times [2022-03-19 04:49:44,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:49:44,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [310909983] [2022-03-19 04:49:44,034 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:49:44,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1067781299, now seen corresponding path program 2 times [2022-03-19 04:49:44,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:49:44,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807326922] [2022-03-19 04:49:44,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:49:44,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:49:44,046 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:49:44,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [761439139] [2022-03-19 04:49:44,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:49:44,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:49:44,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:49:44,048 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) [2022-03-19 04:49:44,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-19 04:49:44,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:49:44,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:49:44,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-19 04:49:44,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:49:44,176 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:49:44,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:49:44,289 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-19 04:49:44,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:49:44,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807326922] [2022-03-19 04:49:44,290 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:49:44,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761439139] [2022-03-19 04:49:44,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761439139] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:49:44,290 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:49:44,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-19 04:49:44,290 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:49:44,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [310909983] [2022-03-19 04:49:44,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [310909983] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:49:44,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:49:44,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 04:49:44,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860411967] [2022-03-19 04:49:44,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:49:44,291 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 04:49:44,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:49:44,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 04:49:44,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-19 04:49:44,291 INFO L87 Difference]: Start difference. First operand 82 states and 101 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2022-03-19 04:49:44,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:49:44,349 INFO L93 Difference]: Finished difference Result 99 states and 121 transitions. [2022-03-19 04:49:44,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 04:49:44,350 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) Word has length 55 [2022-03-19 04:49:44,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:49:44,350 INFO L225 Difference]: With dead ends: 99 [2022-03-19 04:49:44,350 INFO L226 Difference]: Without dead ends: 94 [2022-03-19 04:49:44,351 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2022-03-19 04:49:44,351 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 33 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 04:49:44,351 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 162 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 04:49:44,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-03-19 04:49:44,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 91. [2022-03-19 04:49:44,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 65 states have (on average 1.2) internal successors, (78), 66 states have internal predecessors, (78), 18 states have call successors, (18), 9 states have call predecessors, (18), 7 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-19 04:49:44,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 112 transitions. [2022-03-19 04:49:44,363 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 112 transitions. Word has length 55 [2022-03-19 04:49:44,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:49:44,363 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 112 transitions. [2022-03-19 04:49:44,363 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2022-03-19 04:49:44,363 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 112 transitions. [2022-03-19 04:49:44,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-19 04:49:44,364 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:49:44,364 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 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] [2022-03-19 04:49:44,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-19 04:49:44,577 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-19 04:49:44,578 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:49:44,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:49:44,578 INFO L85 PathProgramCache]: Analyzing trace with hash -2095290798, now seen corresponding path program 3 times [2022-03-19 04:49:44,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:49:44,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [104416971] [2022-03-19 04:49:44,579 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:49:44,579 INFO L85 PathProgramCache]: Analyzing trace with hash -2095290798, now seen corresponding path program 4 times [2022-03-19 04:49:44,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:49:44,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858482805] [2022-03-19 04:49:44,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:49:44,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:49:44,586 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:49:44,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1653732724] [2022-03-19 04:49:44,586 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:49:44,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:49:44,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:49:44,588 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) [2022-03-19 04:49:44,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-19 04:49:44,640 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:49:44,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:49:44,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-19 04:49:44,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:49:44,746 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:49:44,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:49:44,856 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-19 04:49:44,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:49:44,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858482805] [2022-03-19 04:49:44,857 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:49:44,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653732724] [2022-03-19 04:49:44,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653732724] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:49:44,857 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:49:44,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-19 04:49:44,857 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:49:44,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [104416971] [2022-03-19 04:49:44,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [104416971] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:49:44,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:49:44,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 04:49:44,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265668136] [2022-03-19 04:49:44,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:49:44,858 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 04:49:44,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:49:44,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 04:49:44,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-19 04:49:44,858 INFO L87 Difference]: Start difference. First operand 91 states and 112 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2022-03-19 04:49:44,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:49:44,917 INFO L93 Difference]: Finished difference Result 132 states and 170 transitions. [2022-03-19 04:49:44,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 04:49:44,918 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) Word has length 57 [2022-03-19 04:49:44,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:49:44,919 INFO L225 Difference]: With dead ends: 132 [2022-03-19 04:49:44,919 INFO L226 Difference]: Without dead ends: 95 [2022-03-19 04:49:44,919 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-03-19 04:49:44,920 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 31 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 04:49:44,920 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 146 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 04:49:44,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-03-19 04:49:44,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2022-03-19 04:49:44,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 68 states have (on average 1.2058823529411764) internal successors, (82), 68 states have internal predecessors, (82), 18 states have call successors, (18), 9 states have call predecessors, (18), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-19 04:49:44,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 116 transitions. [2022-03-19 04:49:44,931 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 116 transitions. Word has length 57 [2022-03-19 04:49:44,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:49:44,932 INFO L478 AbstractCegarLoop]: Abstraction has 94 states and 116 transitions. [2022-03-19 04:49:44,932 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2022-03-19 04:49:44,932 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 116 transitions. [2022-03-19 04:49:44,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-19 04:49:44,932 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:49:44,932 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 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] [2022-03-19 04:49:44,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-19 04:49:45,148 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-19 04:49:45,149 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:49:45,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:49:45,149 INFO L85 PathProgramCache]: Analyzing trace with hash -659642693, now seen corresponding path program 5 times [2022-03-19 04:49:45,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:49:45,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [230136214] [2022-03-19 04:49:45,149 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:49:45,150 INFO L85 PathProgramCache]: Analyzing trace with hash -659642693, now seen corresponding path program 6 times [2022-03-19 04:49:45,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:49:45,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126921763] [2022-03-19 04:49:45,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:49:45,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:49:45,156 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:49:45,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [647532870] [2022-03-19 04:49:45,156 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:49:45,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:49:45,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:49:45,157 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) [2022-03-19 04:49:45,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-19 04:49:45,229 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 04:49:45,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:49:45,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-19 04:49:45,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:49:45,339 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:49:45,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:49:45,460 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-19 04:49:45,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:49:45,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126921763] [2022-03-19 04:49:45,461 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:49:45,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647532870] [2022-03-19 04:49:45,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647532870] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:49:45,461 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:49:45,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-19 04:49:45,461 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:49:45,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [230136214] [2022-03-19 04:49:45,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [230136214] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:49:45,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:49:45,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 04:49:45,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887412626] [2022-03-19 04:49:45,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:49:45,462 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 04:49:45,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:49:45,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 04:49:45,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-19 04:49:45,462 INFO L87 Difference]: Start difference. First operand 94 states and 116 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2022-03-19 04:49:45,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:49:45,544 INFO L93 Difference]: Finished difference Result 133 states and 171 transitions. [2022-03-19 04:49:45,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 04:49:45,544 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) Word has length 59 [2022-03-19 04:49:45,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:49:45,545 INFO L225 Difference]: With dead ends: 133 [2022-03-19 04:49:45,545 INFO L226 Difference]: Without dead ends: 96 [2022-03-19 04:49:45,545 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=165, Unknown=0, NotChecked=0, Total=272 [2022-03-19 04:49:45,546 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 41 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 04:49:45,546 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 138 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 04:49:45,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-03-19 04:49:45,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2022-03-19 04:49:45,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 70 states have (on average 1.2) internal successors, (84), 70 states have internal predecessors, (84), 18 states have call successors, (18), 9 states have call predecessors, (18), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-19 04:49:45,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 118 transitions. [2022-03-19 04:49:45,577 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 118 transitions. Word has length 59 [2022-03-19 04:49:45,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:49:45,577 INFO L478 AbstractCegarLoop]: Abstraction has 96 states and 118 transitions. [2022-03-19 04:49:45,577 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2022-03-19 04:49:45,577 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 118 transitions. [2022-03-19 04:49:45,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-19 04:49:45,578 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:49:45,578 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 3, 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] [2022-03-19 04:49:45,584 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-03-19 04:49:45,782 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-19 04:49:45,782 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:49:45,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:49:45,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1402694082, now seen corresponding path program 3 times [2022-03-19 04:49:45,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:49:45,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1653114397] [2022-03-19 04:49:45,783 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:49:45,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1402694082, now seen corresponding path program 4 times [2022-03-19 04:49:45,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:49:45,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026720232] [2022-03-19 04:49:45,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:49:45,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:49:45,788 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:49:45,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1065530361] [2022-03-19 04:49:45,789 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:49:45,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:49:45,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:49:45,812 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) [2022-03-19 04:49:45,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-19 04:49:45,862 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:49:45,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:49:45,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-19 04:49:45,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:49:45,988 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 10 proven. 54 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:49:45,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:49:46,120 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-03-19 04:49:46,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:49:46,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026720232] [2022-03-19 04:49:46,121 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:49:46,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065530361] [2022-03-19 04:49:46,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065530361] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:49:46,121 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:49:46,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-03-19 04:49:46,121 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:49:46,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1653114397] [2022-03-19 04:49:46,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1653114397] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:49:46,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:49:46,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 04:49:46,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120678610] [2022-03-19 04:49:46,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:49:46,122 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 04:49:46,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:49:46,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 04:49:46,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-03-19 04:49:46,122 INFO L87 Difference]: Start difference. First operand 96 states and 118 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-19 04:49:46,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:49:46,197 INFO L93 Difference]: Finished difference Result 116 states and 142 transitions. [2022-03-19 04:49:46,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 04:49:46,198 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) Word has length 63 [2022-03-19 04:49:46,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:49:46,198 INFO L225 Difference]: With dead ends: 116 [2022-03-19 04:49:46,198 INFO L226 Difference]: Without dead ends: 111 [2022-03-19 04:49:46,199 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=183, Unknown=0, NotChecked=0, Total=306 [2022-03-19 04:49:46,199 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 34 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:49:46,199 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 184 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:49:46,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-03-19 04:49:46,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 106. [2022-03-19 04:49:46,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 76 states have (on average 1.1973684210526316) internal successors, (91), 78 states have internal predecessors, (91), 21 states have call successors, (21), 10 states have call predecessors, (21), 8 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-19 04:49:46,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 131 transitions. [2022-03-19 04:49:46,211 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 131 transitions. Word has length 63 [2022-03-19 04:49:46,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:49:46,212 INFO L478 AbstractCegarLoop]: Abstraction has 106 states and 131 transitions. [2022-03-19 04:49:46,212 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-19 04:49:46,212 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 131 transitions. [2022-03-19 04:49:46,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-19 04:49:46,212 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:49:46,212 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 3, 3, 3, 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, 1] [2022-03-19 04:49:46,234 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-19 04:49:46,432 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:49:46,433 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:49:46,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:49:46,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1823928061, now seen corresponding path program 5 times [2022-03-19 04:49:46,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:49:46,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1453717389] [2022-03-19 04:49:46,433 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:49:46,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1823928061, now seen corresponding path program 6 times [2022-03-19 04:49:46,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:49:46,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302535347] [2022-03-19 04:49:46,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:49:46,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:49:46,438 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:49:46,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [935612862] [2022-03-19 04:49:46,438 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:49:46,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:49:46,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:49:46,440 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) [2022-03-19 04:49:46,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-19 04:49:46,515 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-19 04:49:46,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:49:46,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-19 04:49:46,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:49:46,629 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 12 proven. 58 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:49:46,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:49:46,763 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-03-19 04:49:46,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:49:46,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302535347] [2022-03-19 04:49:46,764 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:49:46,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935612862] [2022-03-19 04:49:46,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935612862] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:49:46,764 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:49:46,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-03-19 04:49:46,764 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:49:46,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1453717389] [2022-03-19 04:49:46,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1453717389] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:49:46,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:49:46,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 04:49:46,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705746050] [2022-03-19 04:49:46,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:49:46,765 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 04:49:46,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:49:46,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 04:49:46,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-03-19 04:49:46,765 INFO L87 Difference]: Start difference. First operand 106 states and 131 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-19 04:49:46,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:49:46,847 INFO L93 Difference]: Finished difference Result 149 states and 191 transitions. [2022-03-19 04:49:46,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 04:49:46,847 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) Word has length 65 [2022-03-19 04:49:46,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:49:46,848 INFO L225 Difference]: With dead ends: 149 [2022-03-19 04:49:46,848 INFO L226 Difference]: Without dead ends: 112 [2022-03-19 04:49:46,849 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2022-03-19 04:49:46,849 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 47 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:49:46,849 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 173 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:49:46,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-03-19 04:49:46,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 109. [2022-03-19 04:49:46,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 79 states have (on average 1.2025316455696202) internal successors, (95), 80 states have internal predecessors, (95), 21 states have call successors, (21), 10 states have call predecessors, (21), 8 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-19 04:49:46,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 135 transitions. [2022-03-19 04:49:46,861 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 135 transitions. Word has length 65 [2022-03-19 04:49:46,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:49:46,861 INFO L478 AbstractCegarLoop]: Abstraction has 109 states and 135 transitions. [2022-03-19 04:49:46,861 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-19 04:49:46,861 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 135 transitions. [2022-03-19 04:49:46,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-19 04:49:46,862 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:49:46,862 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 2, 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] [2022-03-19 04:49:46,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-19 04:49:47,079 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-19 04:49:47,079 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:49:47,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:49:47,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1211810838, now seen corresponding path program 1 times [2022-03-19 04:49:47,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:49:47,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [859439314] [2022-03-19 04:49:47,080 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:49:47,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1211810838, now seen corresponding path program 2 times [2022-03-19 04:49:47,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:49:47,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184602492] [2022-03-19 04:49:47,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:49:47,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:49:47,085 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:49:47,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [551427269] [2022-03-19 04:49:47,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:49:47,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:49:47,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:49:47,087 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) [2022-03-19 04:49:47,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-19 04:49:47,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:49:47,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:49:47,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-19 04:49:47,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:49:47,240 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 18 proven. 50 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:49:47,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:49:47,401 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-03-19 04:49:47,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:49:47,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184602492] [2022-03-19 04:49:47,402 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:49:47,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551427269] [2022-03-19 04:49:47,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551427269] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:49:47,402 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:49:47,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-03-19 04:49:47,402 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:49:47,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [859439314] [2022-03-19 04:49:47,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [859439314] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:49:47,402 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:49:47,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 04:49:47,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739035663] [2022-03-19 04:49:47,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:49:47,403 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 04:49:47,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:49:47,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 04:49:47,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-03-19 04:49:47,403 INFO L87 Difference]: Start difference. First operand 109 states and 135 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-19 04:49:47,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:49:47,503 INFO L93 Difference]: Finished difference Result 151 states and 194 transitions. [2022-03-19 04:49:47,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 04:49:47,504 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) Word has length 67 [2022-03-19 04:49:47,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:49:47,508 INFO L225 Difference]: With dead ends: 151 [2022-03-19 04:49:47,508 INFO L226 Difference]: Without dead ends: 114 [2022-03-19 04:49:47,509 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=152, Invalid=228, Unknown=0, NotChecked=0, Total=380 [2022-03-19 04:49:47,509 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 47 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:49:47,509 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 160 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:49:47,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-03-19 04:49:47,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2022-03-19 04:49:47,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 84 states have (on average 1.1904761904761905) internal successors, (100), 84 states have internal predecessors, (100), 21 states have call successors, (21), 10 states have call predecessors, (21), 8 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-19 04:49:47,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 140 transitions. [2022-03-19 04:49:47,526 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 140 transitions. Word has length 67 [2022-03-19 04:49:47,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:49:47,527 INFO L478 AbstractCegarLoop]: Abstraction has 114 states and 140 transitions. [2022-03-19 04:49:47,527 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-19 04:49:47,527 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 140 transitions. [2022-03-19 04:49:47,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-19 04:49:47,527 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:49:47,528 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 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, 1] [2022-03-19 04:49:47,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-19 04:49:47,743 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-19 04:49:47,744 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:49:47,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:49:47,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1645787183, now seen corresponding path program 5 times [2022-03-19 04:49:47,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:49:47,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1219986800] [2022-03-19 04:49:47,745 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:49:47,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1645787183, now seen corresponding path program 6 times [2022-03-19 04:49:47,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:49:47,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310772009] [2022-03-19 04:49:47,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:49:47,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:49:47,750 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:49:47,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [196896373] [2022-03-19 04:49:47,750 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:49:47,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:49:47,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:49:47,764 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) [2022-03-19 04:49:47,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-19 04:49:47,823 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 04:49:47,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:49:47,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-19 04:49:47,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:49:47,955 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 86 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:49:47,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:49:48,129 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-19 04:49:48,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:49:48,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310772009] [2022-03-19 04:49:48,130 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:49:48,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196896373] [2022-03-19 04:49:48,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196896373] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:49:48,130 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:49:48,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-03-19 04:49:48,130 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:49:48,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1219986800] [2022-03-19 04:49:48,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1219986800] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:49:48,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:49:48,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 04:49:48,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074322993] [2022-03-19 04:49:48,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:49:48,131 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 04:49:48,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:49:48,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 04:49:48,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-03-19 04:49:48,131 INFO L87 Difference]: Start difference. First operand 114 states and 140 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2022-03-19 04:49:48,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:49:48,244 INFO L93 Difference]: Finished difference Result 137 states and 169 transitions. [2022-03-19 04:49:48,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 04:49:48,245 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) Word has length 71 [2022-03-19 04:49:48,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:49:48,245 INFO L225 Difference]: With dead ends: 137 [2022-03-19 04:49:48,246 INFO L226 Difference]: Without dead ends: 132 [2022-03-19 04:49:48,246 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=170, Invalid=250, Unknown=0, NotChecked=0, Total=420 [2022-03-19 04:49:48,246 INFO L912 BasicCegarLoop]: 48 mSDtfsCounter, 63 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:49:48,246 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 192 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:49:48,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-03-19 04:49:48,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 125. [2022-03-19 04:49:48,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 90 states have (on average 1.1888888888888889) internal successors, (107), 93 states have internal predecessors, (107), 25 states have call successors, (25), 11 states have call predecessors, (25), 9 states have return successors, (23), 20 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-19 04:49:48,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 155 transitions. [2022-03-19 04:49:48,260 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 155 transitions. Word has length 71 [2022-03-19 04:49:48,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:49:48,260 INFO L478 AbstractCegarLoop]: Abstraction has 125 states and 155 transitions. [2022-03-19 04:49:48,260 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2022-03-19 04:49:48,260 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 155 transitions. [2022-03-19 04:49:48,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-19 04:49:48,261 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:49:48,261 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 2, 2, 2, 2, 2, 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] [2022-03-19 04:49:48,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-19 04:49:48,479 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-19 04:49:48,480 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:49:48,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:49:48,480 INFO L85 PathProgramCache]: Analyzing trace with hash -15963768, now seen corresponding path program 1 times [2022-03-19 04:49:48,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:49:48,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [603469404] [2022-03-19 04:49:48,481 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:49:48,481 INFO L85 PathProgramCache]: Analyzing trace with hash -15963768, now seen corresponding path program 2 times [2022-03-19 04:49:48,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:49:48,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344263701] [2022-03-19 04:49:48,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:49:48,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:49:48,486 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:49:48,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1737553938] [2022-03-19 04:49:48,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:49:48,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:49:48,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:49:48,487 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) [2022-03-19 04:49:48,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-19 04:49:48,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:49:48,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:49:48,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-19 04:49:48,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:49:48,611 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-03-19 04:49:48,611 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 04:49:48,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:49:48,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344263701] [2022-03-19 04:49:48,611 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:49:48,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737553938] [2022-03-19 04:49:48,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737553938] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:49:48,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:49:48,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 04:49:48,611 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:49:48,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [603469404] [2022-03-19 04:49:48,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [603469404] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:49:48,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:49:48,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 04:49:48,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820463323] [2022-03-19 04:49:48,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:49:48,612 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 04:49:48,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:49:48,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 04:49:48,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-19 04:49:48,613 INFO L87 Difference]: Start difference. First operand 125 states and 155 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-19 04:49:48,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:49:48,641 INFO L93 Difference]: Finished difference Result 180 states and 235 transitions. [2022-03-19 04:49:48,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 04:49:48,641 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 73 [2022-03-19 04:49:48,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:49:48,643 INFO L225 Difference]: With dead ends: 180 [2022-03-19 04:49:48,643 INFO L226 Difference]: Without dead ends: 143 [2022-03-19 04:49:48,644 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-19 04:49:48,644 INFO L912 BasicCegarLoop]: 59 mSDtfsCounter, 12 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 04:49:48,644 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 138 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 04:49:48,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-03-19 04:49:48,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 137. [2022-03-19 04:49:48,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 99 states have (on average 1.202020202020202) internal successors, (119), 102 states have internal predecessors, (119), 28 states have call successors, (28), 11 states have call predecessors, (28), 9 states have return successors, (26), 23 states have call predecessors, (26), 26 states have call successors, (26) [2022-03-19 04:49:48,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 173 transitions. [2022-03-19 04:49:48,659 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 173 transitions. Word has length 73 [2022-03-19 04:49:48,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:49:48,659 INFO L478 AbstractCegarLoop]: Abstraction has 137 states and 173 transitions. [2022-03-19 04:49:48,660 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-19 04:49:48,660 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 173 transitions. [2022-03-19 04:49:48,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-19 04:49:48,660 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:49:48,660 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:49:48,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-19 04:49:48,877 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-19 04:49:48,877 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:49:48,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:49:48,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1401128268, now seen corresponding path program 7 times [2022-03-19 04:49:48,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:49:48,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [52866992] [2022-03-19 04:49:48,878 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:49:48,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1401128268, now seen corresponding path program 8 times [2022-03-19 04:49:48,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:49:48,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604232654] [2022-03-19 04:49:48,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:49:48,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:49:48,893 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:49:48,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [705772873] [2022-03-19 04:49:48,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:49:48,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:49:48,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:49:48,912 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) [2022-03-19 04:49:48,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-19 04:49:48,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:49:48,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:49:48,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-19 04:49:48,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:49:49,099 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 14 proven. 92 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:49:49,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:49:49,257 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 14 proven. 32 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-19 04:49:49,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:49:49,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604232654] [2022-03-19 04:49:49,257 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:49:49,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705772873] [2022-03-19 04:49:49,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705772873] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:49:49,258 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:49:49,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-03-19 04:49:49,258 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:49:49,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [52866992] [2022-03-19 04:49:49,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [52866992] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:49:49,258 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:49:49,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 04:49:49,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879761706] [2022-03-19 04:49:49,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:49:49,258 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 04:49:49,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:49:49,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 04:49:49,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-03-19 04:49:49,259 INFO L87 Difference]: Start difference. First operand 137 states and 173 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2022-03-19 04:49:49,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:49:49,387 INFO L93 Difference]: Finished difference Result 193 states and 252 transitions. [2022-03-19 04:49:49,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 04:49:49,388 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) Word has length 73 [2022-03-19 04:49:49,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:49:49,390 INFO L225 Difference]: With dead ends: 193 [2022-03-19 04:49:49,390 INFO L226 Difference]: Without dead ends: 144 [2022-03-19 04:49:49,391 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=185, Invalid=277, Unknown=0, NotChecked=0, Total=462 [2022-03-19 04:49:49,392 INFO L912 BasicCegarLoop]: 48 mSDtfsCounter, 57 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:49:49,392 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 193 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:49:49,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-03-19 04:49:49,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 140. [2022-03-19 04:49:49,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 102 states have (on average 1.2058823529411764) internal successors, (123), 104 states have internal predecessors, (123), 28 states have call successors, (28), 11 states have call predecessors, (28), 9 states have return successors, (26), 24 states have call predecessors, (26), 26 states have call successors, (26) [2022-03-19 04:49:49,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 177 transitions. [2022-03-19 04:49:49,412 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 177 transitions. Word has length 73 [2022-03-19 04:49:49,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:49:49,412 INFO L478 AbstractCegarLoop]: Abstraction has 140 states and 177 transitions. [2022-03-19 04:49:49,412 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2022-03-19 04:49:49,412 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 177 transitions. [2022-03-19 04:49:49,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-19 04:49:49,413 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:49:49,413 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 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] [2022-03-19 04:49:49,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-19 04:49:49,627 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:49:49,628 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:49:49,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:49:49,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1116733197, now seen corresponding path program 1 times [2022-03-19 04:49:49,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:49:49,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [524987136] [2022-03-19 04:49:49,628 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:49:49,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1116733197, now seen corresponding path program 2 times [2022-03-19 04:49:49,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:49:49,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095355352] [2022-03-19 04:49:49,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:49:49,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:49:49,634 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:49:49,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1164774926] [2022-03-19 04:49:49,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:49:49,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:49:49,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:49:49,635 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) [2022-03-19 04:49:49,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-19 04:49:49,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:49:49,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:49:49,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-19 04:49:49,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:49:49,819 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 20 proven. 76 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:49:49,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:49:49,993 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 20 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-19 04:49:49,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:49:49,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095355352] [2022-03-19 04:49:49,994 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:49:49,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164774926] [2022-03-19 04:49:49,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164774926] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:49:49,994 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:49:49,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-03-19 04:49:49,994 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:49:49,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [524987136] [2022-03-19 04:49:49,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [524987136] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:49:49,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:49:49,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 04:49:49,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637079065] [2022-03-19 04:49:49,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:49:49,995 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 04:49:49,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:49:49,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 04:49:49,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-03-19 04:49:49,996 INFO L87 Difference]: Start difference. First operand 140 states and 177 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2022-03-19 04:49:50,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:49:50,142 INFO L93 Difference]: Finished difference Result 195 states and 255 transitions. [2022-03-19 04:49:50,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 04:49:50,142 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) Word has length 75 [2022-03-19 04:49:50,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:49:50,143 INFO L225 Difference]: With dead ends: 195 [2022-03-19 04:49:50,144 INFO L226 Difference]: Without dead ends: 146 [2022-03-19 04:49:50,144 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=205, Invalid=301, Unknown=0, NotChecked=0, Total=506 [2022-03-19 04:49:50,146 INFO L912 BasicCegarLoop]: 48 mSDtfsCounter, 66 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:49:50,146 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 176 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:49:50,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-03-19 04:49:50,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2022-03-19 04:49:50,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 108 states have (on average 1.1944444444444444) internal successors, (129), 108 states have internal predecessors, (129), 28 states have call successors, (28), 11 states have call predecessors, (28), 9 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-03-19 04:49:50,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 183 transitions. [2022-03-19 04:49:50,177 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 183 transitions. Word has length 75 [2022-03-19 04:49:50,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:49:50,177 INFO L478 AbstractCegarLoop]: Abstraction has 146 states and 183 transitions. [2022-03-19 04:49:50,177 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2022-03-19 04:49:50,178 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 183 transitions. [2022-03-19 04:49:50,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-19 04:49:50,178 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:49:50,178 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 5, 5, 5, 5, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:49:50,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-19 04:49:50,402 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:49:50,403 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:49:50,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:49:50,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1970775776, now seen corresponding path program 7 times [2022-03-19 04:49:50,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:49:50,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1267427145] [2022-03-19 04:49:50,404 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:49:50,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1970775776, now seen corresponding path program 8 times [2022-03-19 04:49:50,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:49:50,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460448910] [2022-03-19 04:49:50,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:49:50,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:49:50,410 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:49:50,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [35715967] [2022-03-19 04:49:50,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:49:50,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:49:50,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:49:50,412 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) [2022-03-19 04:49:50,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-19 04:49:50,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:49:50,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:49:50,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-19 04:49:50,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:49:50,593 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 14 proven. 126 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:49:50,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:49:50,815 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 14 proven. 42 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-19 04:49:50,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:49:50,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460448910] [2022-03-19 04:49:50,816 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:49:50,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35715967] [2022-03-19 04:49:50,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35715967] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:49:50,816 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:49:50,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-03-19 04:49:50,816 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:49:50,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1267427145] [2022-03-19 04:49:50,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1267427145] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:49:50,817 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:49:50,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 04:49:50,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991747025] [2022-03-19 04:49:50,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:49:50,817 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 04:49:50,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:49:50,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 04:49:50,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-03-19 04:49:50,818 INFO L87 Difference]: Start difference. First operand 146 states and 183 transitions. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-19 04:49:50,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:49:50,958 INFO L93 Difference]: Finished difference Result 168 states and 210 transitions. [2022-03-19 04:49:50,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 04:49:50,958 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) Word has length 79 [2022-03-19 04:49:50,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:49:50,959 INFO L225 Difference]: With dead ends: 168 [2022-03-19 04:49:50,959 INFO L226 Difference]: Without dead ends: 163 [2022-03-19 04:49:50,960 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=225, Invalid=327, Unknown=0, NotChecked=0, Total=552 [2022-03-19 04:49:50,961 INFO L912 BasicCegarLoop]: 51 mSDtfsCounter, 68 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:49:50,961 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 233 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:49:50,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-03-19 04:49:50,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 157. [2022-03-19 04:49:50,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 114 states have (on average 1.1929824561403508) internal successors, (136), 117 states have internal predecessors, (136), 32 states have call successors, (32), 12 states have call predecessors, (32), 10 states have return successors, (30), 27 states have call predecessors, (30), 30 states have call successors, (30) [2022-03-19 04:49:50,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 198 transitions. [2022-03-19 04:49:50,981 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 198 transitions. Word has length 79 [2022-03-19 04:49:50,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:49:50,982 INFO L478 AbstractCegarLoop]: Abstraction has 157 states and 198 transitions. [2022-03-19 04:49:50,982 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-19 04:49:50,982 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 198 transitions. [2022-03-19 04:49:50,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-03-19 04:49:50,985 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:49:50,985 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 3, 3, 3, 2, 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] [2022-03-19 04:49:51,004 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-19 04:49:51,201 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:49:51,202 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:49:51,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:49:51,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1693648491, now seen corresponding path program 1 times [2022-03-19 04:49:51,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:49:51,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1451577869] [2022-03-19 04:49:51,203 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:49:51,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1693648491, now seen corresponding path program 2 times [2022-03-19 04:49:51,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:49:51,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480373077] [2022-03-19 04:49:51,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:49:51,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:49:51,208 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:49:51,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [365819295] [2022-03-19 04:49:51,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:49:51,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:49:51,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:49:51,210 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) [2022-03-19 04:49:51,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-19 04:49:51,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:49:51,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:49:51,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-19 04:49:51,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:49:51,470 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 18 proven. 108 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:49:51,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:49:51,655 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-19 04:49:51,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:49:51,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480373077] [2022-03-19 04:49:51,655 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:49:51,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365819295] [2022-03-19 04:49:51,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365819295] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:49:51,655 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:49:51,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-03-19 04:49:51,655 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:49:51,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1451577869] [2022-03-19 04:49:51,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1451577869] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:49:51,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:49:51,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 04:49:51,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440897085] [2022-03-19 04:49:51,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:49:51,656 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 04:49:51,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:49:51,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 04:49:51,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-03-19 04:49:51,657 INFO L87 Difference]: Start difference. First operand 157 states and 198 transitions. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-19 04:49:51,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:49:51,783 INFO L93 Difference]: Finished difference Result 213 states and 277 transitions. [2022-03-19 04:49:51,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 04:49:51,792 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) Word has length 81 [2022-03-19 04:49:51,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:49:51,793 INFO L225 Difference]: With dead ends: 213 [2022-03-19 04:49:51,793 INFO L226 Difference]: Without dead ends: 164 [2022-03-19 04:49:51,793 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=243, Invalid=357, Unknown=0, NotChecked=0, Total=600 [2022-03-19 04:49:51,794 INFO L912 BasicCegarLoop]: 51 mSDtfsCounter, 100 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:49:51,794 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 185 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:49:51,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-03-19 04:49:51,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 160. [2022-03-19 04:49:51,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 117 states have (on average 1.1965811965811965) internal successors, (140), 119 states have internal predecessors, (140), 32 states have call successors, (32), 12 states have call predecessors, (32), 10 states have return successors, (30), 28 states have call predecessors, (30), 30 states have call successors, (30) [2022-03-19 04:49:51,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 202 transitions. [2022-03-19 04:49:51,813 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 202 transitions. Word has length 81 [2022-03-19 04:49:51,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:49:51,813 INFO L478 AbstractCegarLoop]: Abstraction has 160 states and 202 transitions. [2022-03-19 04:49:51,813 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-19 04:49:51,813 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 202 transitions. [2022-03-19 04:49:51,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-03-19 04:49:51,814 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:49:51,814 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 3, 3, 3, 3, 3, 2, 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] [2022-03-19 04:49:51,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-19 04:49:52,029 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:49:52,030 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:49:52,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:49:52,030 INFO L85 PathProgramCache]: Analyzing trace with hash -918360272, now seen corresponding path program 3 times [2022-03-19 04:49:52,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:49:52,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1206995191] [2022-03-19 04:49:52,030 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:49:52,030 INFO L85 PathProgramCache]: Analyzing trace with hash -918360272, now seen corresponding path program 4 times [2022-03-19 04:49:52,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:49:52,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920673919] [2022-03-19 04:49:52,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:49:52,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:49:52,035 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:49:52,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [944280526] [2022-03-19 04:49:52,035 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:49:52,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:49:52,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:49:52,036 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) [2022-03-19 04:49:52,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-19 04:49:52,138 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:49:52,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:49:52,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-19 04:49:52,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:49:52,298 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 22 proven. 110 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:49:52,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:49:52,504 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-19 04:49:52,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:49:52,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920673919] [2022-03-19 04:49:52,505 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:49:52,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944280526] [2022-03-19 04:49:52,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944280526] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:49:52,505 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:49:52,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-03-19 04:49:52,505 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:49:52,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1206995191] [2022-03-19 04:49:52,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1206995191] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:49:52,505 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:49:52,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 04:49:52,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55661653] [2022-03-19 04:49:52,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:49:52,506 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 04:49:52,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:49:52,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 04:49:52,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-03-19 04:49:52,506 INFO L87 Difference]: Start difference. First operand 160 states and 202 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-19 04:49:52,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:49:52,625 INFO L93 Difference]: Finished difference Result 215 states and 280 transitions. [2022-03-19 04:49:52,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 04:49:52,630 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) Word has length 83 [2022-03-19 04:49:52,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:49:52,631 INFO L225 Difference]: With dead ends: 215 [2022-03-19 04:49:52,631 INFO L226 Difference]: Without dead ends: 166 [2022-03-19 04:49:52,631 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=266, Invalid=384, Unknown=0, NotChecked=0, Total=650 [2022-03-19 04:49:52,631 INFO L912 BasicCegarLoop]: 51 mSDtfsCounter, 87 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:49:52,632 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 209 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:49:52,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-03-19 04:49:52,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2022-03-19 04:49:52,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 123 states have (on average 1.1869918699186992) internal successors, (146), 123 states have internal predecessors, (146), 32 states have call successors, (32), 12 states have call predecessors, (32), 10 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-03-19 04:49:52,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 208 transitions. [2022-03-19 04:49:52,662 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 208 transitions. Word has length 83 [2022-03-19 04:49:52,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:49:52,662 INFO L478 AbstractCegarLoop]: Abstraction has 166 states and 208 transitions. [2022-03-19 04:49:52,662 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-19 04:49:52,663 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 208 transitions. [2022-03-19 04:49:52,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-03-19 04:49:52,664 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:49:52,664 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-03-19 04:49:52,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-19 04:49:52,880 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:49:52,880 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:49:52,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:49:52,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1698627479, now seen corresponding path program 1 times [2022-03-19 04:49:52,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:49:52,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [823340456] [2022-03-19 04:49:52,881 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:49:52,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1698627479, now seen corresponding path program 2 times [2022-03-19 04:49:52,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:49:52,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711493505] [2022-03-19 04:49:52,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:49:52,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:49:52,891 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:49:52,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1135014718] [2022-03-19 04:49:52,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:49:52,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:49:52,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:49:52,892 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) [2022-03-19 04:49:52,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-19 04:49:52,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:49:52,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:49:52,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-19 04:49:52,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:49:53,072 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 16 proven. 144 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:49:53,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:49:53,283 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 16 proven. 32 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-03-19 04:49:53,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:49:53,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711493505] [2022-03-19 04:49:53,283 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:49:53,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135014718] [2022-03-19 04:49:53,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135014718] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:49:53,284 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:49:53,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2022-03-19 04:49:53,284 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:49:53,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [823340456] [2022-03-19 04:49:53,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [823340456] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:49:53,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:49:53,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 04:49:53,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348977200] [2022-03-19 04:49:53,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:49:53,284 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 04:49:53,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:49:53,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 04:49:53,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-03-19 04:49:53,285 INFO L87 Difference]: Start difference. First operand 166 states and 208 transitions. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2022-03-19 04:49:53,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:49:53,398 INFO L93 Difference]: Finished difference Result 188 states and 235 transitions. [2022-03-19 04:49:53,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 04:49:53,398 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) Word has length 87 [2022-03-19 04:49:53,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:49:53,399 INFO L225 Difference]: With dead ends: 188 [2022-03-19 04:49:53,399 INFO L226 Difference]: Without dead ends: 183 [2022-03-19 04:49:53,400 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=288, Invalid=414, Unknown=0, NotChecked=0, Total=702 [2022-03-19 04:49:53,400 INFO L912 BasicCegarLoop]: 54 mSDtfsCounter, 118 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:49:53,400 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 214 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:49:53,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-03-19 04:49:53,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 177. [2022-03-19 04:49:53,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 129 states have (on average 1.186046511627907) internal successors, (153), 132 states have internal predecessors, (153), 36 states have call successors, (36), 13 states have call predecessors, (36), 11 states have return successors, (34), 31 states have call predecessors, (34), 34 states have call successors, (34) [2022-03-19 04:49:53,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 223 transitions. [2022-03-19 04:49:53,419 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 223 transitions. Word has length 87 [2022-03-19 04:49:53,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:49:53,420 INFO L478 AbstractCegarLoop]: Abstraction has 177 states and 223 transitions. [2022-03-19 04:49:53,420 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2022-03-19 04:49:53,420 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 223 transitions. [2022-03-19 04:49:53,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-03-19 04:49:53,421 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:49:53,421 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-03-19 04:49:53,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-19 04:49:53,637 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:49:53,637 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:49:53,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:49:53,638 INFO L85 PathProgramCache]: Analyzing trace with hash 2133755932, now seen corresponding path program 3 times [2022-03-19 04:49:53,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:49:53,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1987625406] [2022-03-19 04:49:53,638 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:49:53,638 INFO L85 PathProgramCache]: Analyzing trace with hash 2133755932, now seen corresponding path program 4 times [2022-03-19 04:49:53,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:49:53,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907257586] [2022-03-19 04:49:53,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:49:53,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:49:53,645 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:49:53,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [85171115] [2022-03-19 04:49:53,645 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:49:53,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:49:53,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:49:53,647 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) [2022-03-19 04:49:53,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-19 04:49:53,693 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:49:53,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:49:53,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 04:49:53,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:49:53,782 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 26 proven. 16 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-03-19 04:49:53,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:49:53,882 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 26 proven. 16 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-03-19 04:49:53,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:49:53,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907257586] [2022-03-19 04:49:53,883 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:49:53,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85171115] [2022-03-19 04:49:53,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85171115] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:49:53,883 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:49:53,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2022-03-19 04:49:53,883 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:49:53,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1987625406] [2022-03-19 04:49:53,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1987625406] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:49:53,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:49:53,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 04:49:53,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321318560] [2022-03-19 04:49:53,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:49:53,884 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 04:49:53,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:49:53,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 04:49:53,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 04:49:53,884 INFO L87 Difference]: Start difference. First operand 177 states and 223 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-19 04:49:53,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:49:53,943 INFO L93 Difference]: Finished difference Result 407 states and 543 transitions. [2022-03-19 04:49:53,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 04:49:53,944 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 89 [2022-03-19 04:49:53,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:49:53,945 INFO L225 Difference]: With dead ends: 407 [2022-03-19 04:49:53,945 INFO L226 Difference]: Without dead ends: 301 [2022-03-19 04:49:53,945 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 174 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 04:49:53,946 INFO L912 BasicCegarLoop]: 73 mSDtfsCounter, 13 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 04:49:53,946 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 167 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 04:49:53,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2022-03-19 04:49:53,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 296. [2022-03-19 04:49:53,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 219 states have (on average 1.2191780821917808) internal successors, (267), 225 states have internal predecessors, (267), 65 states have call successors, (65), 13 states have call predecessors, (65), 11 states have return successors, (63), 57 states have call predecessors, (63), 63 states have call successors, (63) [2022-03-19 04:49:53,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 395 transitions. [2022-03-19 04:49:53,984 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 395 transitions. Word has length 89 [2022-03-19 04:49:53,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:49:53,984 INFO L478 AbstractCegarLoop]: Abstraction has 296 states and 395 transitions. [2022-03-19 04:49:53,984 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-19 04:49:53,984 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 395 transitions. [2022-03-19 04:49:53,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-03-19 04:49:53,985 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:49:53,985 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 4, 3, 3, 2, 2, 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] [2022-03-19 04:49:54,001 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-03-19 04:49:54,200 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,SelfDestructingSolverStorable24 [2022-03-19 04:49:54,201 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:49:54,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:49:54,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1322512306, now seen corresponding path program 5 times [2022-03-19 04:49:54,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:49:54,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [390687064] [2022-03-19 04:49:54,202 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:49:54,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1322512306, now seen corresponding path program 6 times [2022-03-19 04:49:54,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:49:54,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697462542] [2022-03-19 04:49:54,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:49:54,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:49:54,206 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:49:54,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [472114876] [2022-03-19 04:49:54,206 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:49:54,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:49:54,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:49:54,228 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) [2022-03-19 04:49:54,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-19 04:49:54,351 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-19 04:49:54,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:49:54,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-19 04:49:54,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:49:54,525 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 16 proven. 152 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:49:54,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:49:54,791 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 16 proven. 40 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-03-19 04:49:54,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:49:54,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697462542] [2022-03-19 04:49:54,791 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:49:54,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472114876] [2022-03-19 04:49:54,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472114876] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:49:54,791 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:49:54,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-03-19 04:49:54,792 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:49:54,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [390687064] [2022-03-19 04:49:54,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [390687064] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:49:54,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:49:54,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 04:49:54,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38223158] [2022-03-19 04:49:54,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:49:54,792 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 04:49:54,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:49:54,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 04:49:54,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 04:49:54,793 INFO L87 Difference]: Start difference. First operand 296 states and 395 transitions. Second operand has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2022-03-19 04:49:54,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:49:54,998 INFO L93 Difference]: Finished difference Result 362 states and 486 transitions. [2022-03-19 04:49:54,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-19 04:49:54,999 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) Word has length 89 [2022-03-19 04:49:54,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:49:55,000 INFO L225 Difference]: With dead ends: 362 [2022-03-19 04:49:55,000 INFO L226 Difference]: Without dead ends: 357 [2022-03-19 04:49:55,001 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=359, Invalid=511, Unknown=0, NotChecked=0, Total=870 [2022-03-19 04:49:55,001 INFO L912 BasicCegarLoop]: 57 mSDtfsCounter, 162 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:49:55,001 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 233 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:49:55,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2022-03-19 04:49:55,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 342. [2022-03-19 04:49:55,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 255 states have (on average 1.231372549019608) internal successors, (314), 261 states have internal predecessors, (314), 74 states have call successors, (74), 14 states have call predecessors, (74), 12 states have return successors, (72), 66 states have call predecessors, (72), 72 states have call successors, (72) [2022-03-19 04:49:55,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 460 transitions. [2022-03-19 04:49:55,047 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 460 transitions. Word has length 89 [2022-03-19 04:49:55,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:49:55,047 INFO L478 AbstractCegarLoop]: Abstraction has 342 states and 460 transitions. [2022-03-19 04:49:55,047 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2022-03-19 04:49:55,047 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 460 transitions. [2022-03-19 04:49:55,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-19 04:49:55,048 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:49:55,048 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:49:55,053 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-03-19 04:49:55,253 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,SelfDestructingSolverStorable25 [2022-03-19 04:49:55,253 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:49:55,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:49:55,254 INFO L85 PathProgramCache]: Analyzing trace with hash -345961389, now seen corresponding path program 5 times [2022-03-19 04:49:55,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:49:55,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2100973233] [2022-03-19 04:49:55,254 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:49:55,254 INFO L85 PathProgramCache]: Analyzing trace with hash -345961389, now seen corresponding path program 6 times [2022-03-19 04:49:55,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:49:55,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095229526] [2022-03-19 04:49:55,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:49:55,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:49:55,259 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:49:55,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1734749719] [2022-03-19 04:49:55,259 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:49:55,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:49:55,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:49:55,261 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) [2022-03-19 04:49:55,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-19 04:49:55,399 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-19 04:49:55,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:49:55,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-19 04:49:55,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:49:55,570 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 24 proven. 152 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:49:55,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:49:55,790 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 24 proven. 40 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-03-19 04:49:55,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:49:55,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095229526] [2022-03-19 04:49:55,791 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:49:55,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734749719] [2022-03-19 04:49:55,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734749719] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:49:55,791 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:49:55,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2022-03-19 04:49:55,791 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:49:55,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2100973233] [2022-03-19 04:49:55,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2100973233] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:49:55,791 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:49:55,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 04:49:55,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077721945] [2022-03-19 04:49:55,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:49:55,792 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 04:49:55,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:49:55,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 04:49:55,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-03-19 04:49:55,792 INFO L87 Difference]: Start difference. First operand 342 states and 460 transitions. Second operand has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 11 states have internal predecessors, (64), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2022-03-19 04:49:55,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:49:55,992 INFO L93 Difference]: Finished difference Result 427 states and 585 transitions. [2022-03-19 04:49:55,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-19 04:49:55,993 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 11 states have internal predecessors, (64), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) Word has length 91 [2022-03-19 04:49:55,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:49:55,995 INFO L225 Difference]: With dead ends: 427 [2022-03-19 04:49:55,995 INFO L226 Difference]: Without dead ends: 342 [2022-03-19 04:49:55,996 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=335, Invalid=477, Unknown=0, NotChecked=0, Total=812 [2022-03-19 04:49:55,996 INFO L912 BasicCegarLoop]: 54 mSDtfsCounter, 93 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:49:55,997 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 218 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:49:55,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2022-03-19 04:49:56,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 342. [2022-03-19 04:49:56,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 255 states have (on average 1.2156862745098038) internal successors, (310), 261 states have internal predecessors, (310), 74 states have call successors, (74), 14 states have call predecessors, (74), 12 states have return successors, (72), 66 states have call predecessors, (72), 72 states have call successors, (72) [2022-03-19 04:49:56,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 456 transitions. [2022-03-19 04:49:56,045 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 456 transitions. Word has length 91 [2022-03-19 04:49:56,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:49:56,046 INFO L478 AbstractCegarLoop]: Abstraction has 342 states and 456 transitions. [2022-03-19 04:49:56,046 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 11 states have internal predecessors, (64), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2022-03-19 04:49:56,046 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 456 transitions. [2022-03-19 04:49:56,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-03-19 04:49:56,051 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:49:56,052 INFO L500 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:49:56,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-19 04:49:56,256 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,SelfDestructingSolverStorable26 [2022-03-19 04:49:56,256 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:49:56,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:49:56,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1660747519, now seen corresponding path program 7 times [2022-03-19 04:49:56,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:49:56,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1640263993] [2022-03-19 04:49:56,257 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:49:56,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1660747519, now seen corresponding path program 8 times [2022-03-19 04:49:56,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:49:56,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812429221] [2022-03-19 04:49:56,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:49:56,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:49:56,262 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:49:56,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [82971038] [2022-03-19 04:49:56,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:49:56,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:49:56,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:49:56,263 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) [2022-03-19 04:49:56,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-19 04:49:56,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:49:56,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:49:56,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-19 04:49:56,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:49:56,438 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 22 proven. 190 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:49:56,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:49:56,607 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 22 proven. 46 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-03-19 04:49:56,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:49:56,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812429221] [2022-03-19 04:49:56,608 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:49:56,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82971038] [2022-03-19 04:49:56,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82971038] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:49:56,608 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:49:56,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-03-19 04:49:56,608 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:49:56,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1640263993] [2022-03-19 04:49:56,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1640263993] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:49:56,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:49:56,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 04:49:56,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938024377] [2022-03-19 04:49:56,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:49:56,609 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 04:49:56,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:49:56,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 04:49:56,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 04:49:56,609 INFO L87 Difference]: Start difference. First operand 342 states and 456 transitions. Second operand has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 12 states have internal predecessors, (68), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2022-03-19 04:49:56,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:49:56,780 INFO L93 Difference]: Finished difference Result 467 states and 640 transitions. [2022-03-19 04:49:56,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-19 04:49:56,780 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 12 states have internal predecessors, (68), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) Word has length 97 [2022-03-19 04:49:56,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:49:56,788 INFO L225 Difference]: With dead ends: 467 [2022-03-19 04:49:56,788 INFO L226 Difference]: Without dead ends: 352 [2022-03-19 04:49:56,789 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=383, Invalid=547, Unknown=0, NotChecked=0, Total=930 [2022-03-19 04:49:56,789 INFO L912 BasicCegarLoop]: 57 mSDtfsCounter, 118 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:49:56,789 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 238 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:49:56,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2022-03-19 04:49:56,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 344. [2022-03-19 04:49:56,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 257 states have (on average 1.2101167315175096) internal successors, (311), 261 states have internal predecessors, (311), 74 states have call successors, (74), 14 states have call predecessors, (74), 12 states have return successors, (72), 68 states have call predecessors, (72), 72 states have call successors, (72) [2022-03-19 04:49:56,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 457 transitions. [2022-03-19 04:49:56,869 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 457 transitions. Word has length 97 [2022-03-19 04:49:56,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:49:56,870 INFO L478 AbstractCegarLoop]: Abstraction has 344 states and 457 transitions. [2022-03-19 04:49:56,870 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 12 states have internal predecessors, (68), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2022-03-19 04:49:56,870 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 457 transitions. [2022-03-19 04:49:56,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-19 04:49:56,875 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:49:56,875 INFO L500 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:49:56,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-19 04:49:57,092 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-19 04:49:57,093 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:49:57,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:49:57,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1020733748, now seen corresponding path program 7 times [2022-03-19 04:49:57,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:49:57,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1424809387] [2022-03-19 04:49:57,094 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:49:57,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1020733748, now seen corresponding path program 8 times [2022-03-19 04:49:57,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:49:57,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838203269] [2022-03-19 04:49:57,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:49:57,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:49:57,108 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:49:57,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1084539491] [2022-03-19 04:49:57,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:49:57,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:49:57,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:49:57,110 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:49:57,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-19 04:49:57,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:49:57,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:49:57,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-19 04:49:57,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:49:57,254 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2022-03-19 04:49:57,254 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 04:49:57,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:49:57,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838203269] [2022-03-19 04:49:57,255 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:49:57,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084539491] [2022-03-19 04:49:57,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084539491] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:49:57,255 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:49:57,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 04:49:57,255 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:49:57,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1424809387] [2022-03-19 04:49:57,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1424809387] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:49:57,255 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:49:57,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 04:49:57,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936797074] [2022-03-19 04:49:57,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:49:57,256 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 04:49:57,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:49:57,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 04:49:57,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-19 04:49:57,256 INFO L87 Difference]: Start difference. First operand 344 states and 457 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-19 04:49:57,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:49:57,328 INFO L93 Difference]: Finished difference Result 504 states and 675 transitions. [2022-03-19 04:49:57,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 04:49:57,329 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 99 [2022-03-19 04:49:57,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:49:57,330 INFO L225 Difference]: With dead ends: 504 [2022-03-19 04:49:57,330 INFO L226 Difference]: Without dead ends: 362 [2022-03-19 04:49:57,331 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-19 04:49:57,331 INFO L912 BasicCegarLoop]: 52 mSDtfsCounter, 12 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 04:49:57,331 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 131 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 04:49:57,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-03-19 04:49:57,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 352. [2022-03-19 04:49:57,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 265 states have (on average 1.2150943396226415) internal successors, (322), 269 states have internal predecessors, (322), 74 states have call successors, (74), 14 states have call predecessors, (74), 12 states have return successors, (72), 68 states have call predecessors, (72), 72 states have call successors, (72) [2022-03-19 04:49:57,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 468 transitions. [2022-03-19 04:49:57,378 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 468 transitions. Word has length 99 [2022-03-19 04:49:57,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:49:57,378 INFO L478 AbstractCegarLoop]: Abstraction has 352 states and 468 transitions. [2022-03-19 04:49:57,378 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-19 04:49:57,378 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 468 transitions. [2022-03-19 04:49:57,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-19 04:49:57,379 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:49:57,379 INFO L500 BasicCegarLoop]: trace histogram [10, 9, 9, 6, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:49:57,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-19 04:49:57,596 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-19 04:49:57,596 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:49:57,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:49:57,596 INFO L85 PathProgramCache]: Analyzing trace with hash 359487094, now seen corresponding path program 9 times [2022-03-19 04:49:57,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:49:57,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1155351478] [2022-03-19 04:49:57,597 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:49:57,597 INFO L85 PathProgramCache]: Analyzing trace with hash 359487094, now seen corresponding path program 10 times [2022-03-19 04:49:57,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:49:57,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107530676] [2022-03-19 04:49:57,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:49:57,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:49:57,601 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:49:57,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1563810794] [2022-03-19 04:49:57,601 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:49:57,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:49:57,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:49:57,602 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:49:57,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-19 04:49:57,753 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:49:57,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:49:57,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-19 04:49:57,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:49:57,926 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 26 proven. 202 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:49:57,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:49:58,096 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 26 proven. 58 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-03-19 04:49:58,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:49:58,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107530676] [2022-03-19 04:49:58,097 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:49:58,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563810794] [2022-03-19 04:49:58,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563810794] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:49:58,097 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:49:58,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-03-19 04:49:58,097 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:49:58,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1155351478] [2022-03-19 04:49:58,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1155351478] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:49:58,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:49:58,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 04:49:58,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262104713] [2022-03-19 04:49:58,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:49:58,098 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 04:49:58,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:49:58,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 04:49:58,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 04:49:58,098 INFO L87 Difference]: Start difference. First operand 352 states and 468 transitions. Second operand has 13 states, 13 states have (on average 5.384615384615385) internal successors, (70), 12 states have internal predecessors, (70), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2022-03-19 04:49:58,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:49:58,293 INFO L93 Difference]: Finished difference Result 471 states and 642 transitions. [2022-03-19 04:49:58,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-19 04:49:58,294 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.384615384615385) internal successors, (70), 12 states have internal predecessors, (70), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) Word has length 99 [2022-03-19 04:49:58,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:49:58,297 INFO L225 Difference]: With dead ends: 471 [2022-03-19 04:49:58,297 INFO L226 Difference]: Without dead ends: 364 [2022-03-19 04:49:58,297 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=412, Invalid=580, Unknown=0, NotChecked=0, Total=992 [2022-03-19 04:49:58,298 INFO L912 BasicCegarLoop]: 57 mSDtfsCounter, 133 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:49:58,298 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 219 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:49:58,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-03-19 04:49:58,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 364. [2022-03-19 04:49:58,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 277 states have (on average 1.2057761732851986) internal successors, (334), 277 states have internal predecessors, (334), 74 states have call successors, (74), 14 states have call predecessors, (74), 12 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) [2022-03-19 04:49:58,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 480 transitions. [2022-03-19 04:49:58,352 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 480 transitions. Word has length 99 [2022-03-19 04:49:58,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:49:58,353 INFO L478 AbstractCegarLoop]: Abstraction has 364 states and 480 transitions. [2022-03-19 04:49:58,353 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.384615384615385) internal successors, (70), 12 states have internal predecessors, (70), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2022-03-19 04:49:58,353 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 480 transitions. [2022-03-19 04:49:58,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-03-19 04:49:58,354 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:49:58,354 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:49:58,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-19 04:49:58,567 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:49:58,567 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:49:58,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:49:58,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1761003221, now seen corresponding path program 3 times [2022-03-19 04:49:58,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:49:58,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1945950396] [2022-03-19 04:49:58,568 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:49:58,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1761003221, now seen corresponding path program 4 times [2022-03-19 04:49:58,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:49:58,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020880907] [2022-03-19 04:49:58,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:49:58,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:49:58,575 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:49:58,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [349910659] [2022-03-19 04:49:58,576 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:49:58,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:49:58,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:49:58,584 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:49:58,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-19 04:49:58,675 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:49:58,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:49:58,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-19 04:49:58,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:49:58,862 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 20 proven. 236 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:49:58,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:49:59,111 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 20 proven. 56 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-19 04:49:59,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:49:59,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020880907] [2022-03-19 04:49:59,111 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:49:59,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349910659] [2022-03-19 04:49:59,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349910659] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:49:59,112 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:49:59,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2022-03-19 04:49:59,112 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:49:59,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1945950396] [2022-03-19 04:49:59,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1945950396] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:49:59,112 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:49:59,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 04:49:59,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694393689] [2022-03-19 04:49:59,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:49:59,113 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 04:49:59,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:49:59,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 04:49:59,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 04:49:59,113 INFO L87 Difference]: Start difference. First operand 364 states and 480 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 13 states have internal predecessors, (72), 13 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2022-03-19 04:49:59,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:49:59,335 INFO L93 Difference]: Finished difference Result 407 states and 538 transitions. [2022-03-19 04:49:59,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-19 04:49:59,336 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 13 states have internal predecessors, (72), 13 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) Word has length 103 [2022-03-19 04:49:59,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:49:59,337 INFO L225 Difference]: With dead ends: 407 [2022-03-19 04:49:59,337 INFO L226 Difference]: Without dead ends: 396 [2022-03-19 04:49:59,338 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 182 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=379, Invalid=551, Unknown=0, NotChecked=0, Total=930 [2022-03-19 04:49:59,338 INFO L912 BasicCegarLoop]: 60 mSDtfsCounter, 117 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:49:59,338 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 273 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:49:59,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2022-03-19 04:49:59,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 377. [2022-03-19 04:49:59,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 281 states have (on average 1.206405693950178) internal successors, (339), 288 states have internal predecessors, (339), 82 states have call successors, (82), 15 states have call predecessors, (82), 13 states have return successors, (80), 73 states have call predecessors, (80), 80 states have call successors, (80) [2022-03-19 04:49:59,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 501 transitions. [2022-03-19 04:49:59,388 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 501 transitions. Word has length 103 [2022-03-19 04:49:59,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:49:59,388 INFO L478 AbstractCegarLoop]: Abstraction has 377 states and 501 transitions. [2022-03-19 04:49:59,388 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 13 states have internal predecessors, (72), 13 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2022-03-19 04:49:59,388 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 501 transitions. [2022-03-19 04:49:59,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-03-19 04:49:59,389 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:49:59,390 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2022-03-19 04:49:59,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-19 04:49:59,605 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:49:59,606 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:49:59,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:49:59,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1733340336, now seen corresponding path program 9 times [2022-03-19 04:49:59,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:49:59,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [601819365] [2022-03-19 04:49:59,606 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:49:59,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1733340336, now seen corresponding path program 10 times [2022-03-19 04:49:59,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:49:59,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674350012] [2022-03-19 04:49:59,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:49:59,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:49:59,611 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:49:59,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1887586184] [2022-03-19 04:49:59,611 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:49:59,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:49:59,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:49:59,613 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:49:59,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-19 04:49:59,653 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:49:59,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:49:59,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 04:49:59,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:49:59,817 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 60 proven. 24 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-19 04:49:59,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:49:59,974 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 60 proven. 24 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-19 04:49:59,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:49:59,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674350012] [2022-03-19 04:49:59,974 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:49:59,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887586184] [2022-03-19 04:49:59,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887586184] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:49:59,974 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:49:59,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-03-19 04:49:59,975 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:49:59,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [601819365] [2022-03-19 04:49:59,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [601819365] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:49:59,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:49:59,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 04:49:59,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046538519] [2022-03-19 04:49:59,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:49:59,975 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 04:49:59,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:49:59,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 04:49:59,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-19 04:49:59,976 INFO L87 Difference]: Start difference. First operand 377 states and 501 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 6 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-19 04:50:00,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:50:00,171 INFO L93 Difference]: Finished difference Result 649 states and 907 transitions. [2022-03-19 04:50:00,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 04:50:00,171 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 6 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 105 [2022-03-19 04:50:00,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:50:00,174 INFO L225 Difference]: With dead ends: 649 [2022-03-19 04:50:00,174 INFO L226 Difference]: Without dead ends: 588 [2022-03-19 04:50:00,174 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-19 04:50:00,175 INFO L912 BasicCegarLoop]: 94 mSDtfsCounter, 38 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:50:00,175 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 344 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:50:00,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2022-03-19 04:50:00,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 504. [2022-03-19 04:50:00,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 376 states have (on average 1.247340425531915) internal successors, (469), 386 states have internal predecessors, (469), 114 states have call successors, (114), 15 states have call predecessors, (114), 13 states have return successors, (112), 102 states have call predecessors, (112), 112 states have call successors, (112) [2022-03-19 04:50:00,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 695 transitions. [2022-03-19 04:50:00,258 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 695 transitions. Word has length 105 [2022-03-19 04:50:00,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:50:00,258 INFO L478 AbstractCegarLoop]: Abstraction has 504 states and 695 transitions. [2022-03-19 04:50:00,258 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 6 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-19 04:50:00,258 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 695 transitions. [2022-03-19 04:50:00,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-03-19 04:50:00,260 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:50:00,260 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 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] [2022-03-19 04:50:00,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-19 04:50:00,475 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:50:00,475 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:50:00,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:50:00,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1666981150, now seen corresponding path program 11 times [2022-03-19 04:50:00,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:50:00,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1381350403] [2022-03-19 04:50:00,476 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:50:00,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1666981150, now seen corresponding path program 12 times [2022-03-19 04:50:00,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:50:00,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840609975] [2022-03-19 04:50:00,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:50:00,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:50:00,481 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:50:00,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1975808355] [2022-03-19 04:50:00,481 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:50:00,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:50:00,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:50:00,482 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:50:00,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-19 04:50:00,589 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 04:50:00,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:50:00,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-19 04:50:00,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:50:00,790 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 24 proven. 242 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:50:00,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:50:01,060 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 24 proven. 62 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-19 04:50:01,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:50:01,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840609975] [2022-03-19 04:50:01,060 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:50:01,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975808355] [2022-03-19 04:50:01,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975808355] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:50:01,060 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:50:01,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2022-03-19 04:50:01,061 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:50:01,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1381350403] [2022-03-19 04:50:01,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1381350403] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:50:01,061 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:50:01,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 04:50:01,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691119887] [2022-03-19 04:50:01,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:50:01,061 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 04:50:01,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:50:01,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 04:50:01,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 04:50:01,062 INFO L87 Difference]: Start difference. First operand 504 states and 695 transitions. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 13 states have internal predecessors, (74), 13 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2022-03-19 04:50:01,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:50:01,296 INFO L93 Difference]: Finished difference Result 753 states and 1073 transitions. [2022-03-19 04:50:01,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-19 04:50:01,296 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 13 states have internal predecessors, (74), 13 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) Word has length 105 [2022-03-19 04:50:01,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:50:01,298 INFO L225 Difference]: With dead ends: 753 [2022-03-19 04:50:01,298 INFO L226 Difference]: Without dead ends: 532 [2022-03-19 04:50:01,299 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 186 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=404, Invalid=588, Unknown=0, NotChecked=0, Total=992 [2022-03-19 04:50:01,300 INFO L912 BasicCegarLoop]: 60 mSDtfsCounter, 152 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:50:01,300 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 238 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:50:01,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2022-03-19 04:50:01,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 522. [2022-03-19 04:50:01,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 394 states have (on average 1.2461928934010151) internal successors, (491), 398 states have internal predecessors, (491), 114 states have call successors, (114), 15 states have call predecessors, (114), 13 states have return successors, (112), 108 states have call predecessors, (112), 112 states have call successors, (112) [2022-03-19 04:50:01,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 717 transitions. [2022-03-19 04:50:01,405 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 717 transitions. Word has length 105 [2022-03-19 04:50:01,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:50:01,405 INFO L478 AbstractCegarLoop]: Abstraction has 522 states and 717 transitions. [2022-03-19 04:50:01,405 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 13 states have internal predecessors, (74), 13 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2022-03-19 04:50:01,405 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 717 transitions. [2022-03-19 04:50:01,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-03-19 04:50:01,406 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:50:01,406 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 7, 6, 6, 6, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:50:01,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-19 04:50:01,619 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-03-19 04:50:01,619 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:50:01,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:50:01,620 INFO L85 PathProgramCache]: Analyzing trace with hash -2132095591, now seen corresponding path program 11 times [2022-03-19 04:50:01,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:50:01,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [556798185] [2022-03-19 04:50:01,620 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:50:01,620 INFO L85 PathProgramCache]: Analyzing trace with hash -2132095591, now seen corresponding path program 12 times [2022-03-19 04:50:01,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:50:01,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419937320] [2022-03-19 04:50:01,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:50:01,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:50:01,624 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:50:01,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1720405053] [2022-03-19 04:50:01,625 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:50:01,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:50:01,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:50:01,626 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:50:01,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-19 04:50:01,738 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 04:50:01,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:50:01,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-19 04:50:01,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:50:01,960 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 28 proven. 260 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:50:01,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:50:02,198 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 28 proven. 80 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-19 04:50:02,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:50:02,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419937320] [2022-03-19 04:50:02,198 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:50:02,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720405053] [2022-03-19 04:50:02,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720405053] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:50:02,198 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:50:02,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2022-03-19 04:50:02,199 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:50:02,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [556798185] [2022-03-19 04:50:02,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [556798185] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:50:02,199 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:50:02,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 04:50:02,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133151843] [2022-03-19 04:50:02,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:50:02,200 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 04:50:02,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:50:02,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 04:50:02,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 04:50:02,200 INFO L87 Difference]: Start difference. First operand 522 states and 717 transitions. Second operand has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 13 states have internal predecessors, (76), 13 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2022-03-19 04:50:02,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:50:02,481 INFO L93 Difference]: Finished difference Result 735 states and 1041 transitions. [2022-03-19 04:50:02,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-19 04:50:02,482 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 13 states have internal predecessors, (76), 13 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) Word has length 107 [2022-03-19 04:50:02,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:50:02,484 INFO L225 Difference]: With dead ends: 735 [2022-03-19 04:50:02,484 INFO L226 Difference]: Without dead ends: 538 [2022-03-19 04:50:02,485 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 190 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=434, Invalid=622, Unknown=0, NotChecked=0, Total=1056 [2022-03-19 04:50:02,486 INFO L912 BasicCegarLoop]: 60 mSDtfsCounter, 140 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:50:02,486 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 240 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:50:02,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2022-03-19 04:50:02,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 538. [2022-03-19 04:50:02,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 410 states have (on average 1.2365853658536585) internal successors, (507), 410 states have internal predecessors, (507), 114 states have call successors, (114), 15 states have call predecessors, (114), 13 states have return successors, (112), 112 states have call predecessors, (112), 112 states have call successors, (112) [2022-03-19 04:50:02,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 733 transitions. [2022-03-19 04:50:02,617 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 733 transitions. Word has length 107 [2022-03-19 04:50:02,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:50:02,617 INFO L478 AbstractCegarLoop]: Abstraction has 538 states and 733 transitions. [2022-03-19 04:50:02,617 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 13 states have internal predecessors, (76), 13 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2022-03-19 04:50:02,617 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 733 transitions. [2022-03-19 04:50:02,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-03-19 04:50:02,618 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:50:02,618 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:50:02,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-19 04:50:02,822 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:50:02,822 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:50:02,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:50:02,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1965005106, now seen corresponding path program 5 times [2022-03-19 04:50:02,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:50:02,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [992669070] [2022-03-19 04:50:02,823 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:50:02,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1965005106, now seen corresponding path program 6 times [2022-03-19 04:50:02,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:50:02,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784046334] [2022-03-19 04:50:02,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:50:02,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:50:02,828 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:50:02,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2032367924] [2022-03-19 04:50:02,828 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:50:02,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:50:02,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:50:02,829 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:50:02,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-19 04:50:02,958 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-19 04:50:02,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:50:02,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-19 04:50:02,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:50:03,197 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 22 proven. 292 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:50:03,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:50:03,436 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 22 proven. 72 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-03-19 04:50:03,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:50:03,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784046334] [2022-03-19 04:50:03,436 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:50:03,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032367924] [2022-03-19 04:50:03,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032367924] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:50:03,436 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:50:03,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2022-03-19 04:50:03,437 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:50:03,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [992669070] [2022-03-19 04:50:03,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [992669070] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:50:03,437 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:50:03,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 04:50:03,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316821017] [2022-03-19 04:50:03,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:50:03,437 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 04:50:03,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:50:03,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 04:50:03,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 04:50:03,438 INFO L87 Difference]: Start difference. First operand 538 states and 733 transitions. Second operand has 15 states, 15 states have (on average 5.2) internal successors, (78), 14 states have internal predecessors, (78), 14 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) [2022-03-19 04:50:03,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:50:03,691 INFO L93 Difference]: Finished difference Result 593 states and 810 transitions. [2022-03-19 04:50:03,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-19 04:50:03,692 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.2) internal successors, (78), 14 states have internal predecessors, (78), 14 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) Word has length 111 [2022-03-19 04:50:03,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:50:03,696 INFO L225 Difference]: With dead ends: 593 [2022-03-19 04:50:03,696 INFO L226 Difference]: Without dead ends: 582 [2022-03-19 04:50:03,697 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 198 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=399, Invalid=593, Unknown=0, NotChecked=0, Total=992 [2022-03-19 04:50:03,697 INFO L912 BasicCegarLoop]: 63 mSDtfsCounter, 172 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:50:03,724 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 266 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:50:03,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2022-03-19 04:50:03,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 560. [2022-03-19 04:50:03,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 418 states have (on average 1.2344497607655502) internal successors, (516), 428 states have internal predecessors, (516), 127 states have call successors, (127), 16 states have call predecessors, (127), 14 states have return successors, (125), 115 states have call predecessors, (125), 125 states have call successors, (125) [2022-03-19 04:50:03,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 768 transitions. [2022-03-19 04:50:03,816 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 768 transitions. Word has length 111 [2022-03-19 04:50:03,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:50:03,816 INFO L478 AbstractCegarLoop]: Abstraction has 560 states and 768 transitions. [2022-03-19 04:50:03,816 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.2) internal successors, (78), 14 states have internal predecessors, (78), 14 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) [2022-03-19 04:50:03,816 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 768 transitions. [2022-03-19 04:50:03,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-03-19 04:50:03,817 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:50:03,817 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 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] [2022-03-19 04:50:03,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-19 04:50:04,021 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-03-19 04:50:04,022 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:50:04,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:50:04,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1038942829, now seen corresponding path program 13 times [2022-03-19 04:50:04,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:50:04,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1705144209] [2022-03-19 04:50:04,023 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:50:04,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1038942829, now seen corresponding path program 14 times [2022-03-19 04:50:04,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:50:04,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998043780] [2022-03-19 04:50:04,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:50:04,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:50:04,028 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:50:04,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [996745762] [2022-03-19 04:50:04,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:50:04,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:50:04,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:50:04,046 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:50:04,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-19 04:50:04,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:50:04,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:50:04,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-19 04:50:04,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:50:04,276 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 46 proven. 56 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-03-19 04:50:04,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:50:04,457 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 34 proven. 68 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-03-19 04:50:04,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:50:04,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998043780] [2022-03-19 04:50:04,458 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:50:04,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996745762] [2022-03-19 04:50:04,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996745762] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:50:04,458 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:50:04,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-19 04:50:04,458 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:50:04,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1705144209] [2022-03-19 04:50:04,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1705144209] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:50:04,458 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:50:04,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 04:50:04,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232666218] [2022-03-19 04:50:04,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:50:04,459 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 04:50:04,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:50:04,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 04:50:04,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-03-19 04:50:04,459 INFO L87 Difference]: Start difference. First operand 560 states and 768 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 8 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2022-03-19 04:50:04,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:50:04,743 INFO L93 Difference]: Finished difference Result 862 states and 1224 transitions. [2022-03-19 04:50:04,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 04:50:04,743 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 8 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) Word has length 113 [2022-03-19 04:50:04,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:50:04,745 INFO L225 Difference]: With dead ends: 862 [2022-03-19 04:50:04,745 INFO L226 Difference]: Without dead ends: 711 [2022-03-19 04:50:04,746 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2022-03-19 04:50:04,746 INFO L912 BasicCegarLoop]: 106 mSDtfsCounter, 76 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:50:04,747 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 435 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:50:04,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2022-03-19 04:50:04,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 560. [2022-03-19 04:50:04,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 418 states have (on average 1.2344497607655502) internal successors, (516), 428 states have internal predecessors, (516), 127 states have call successors, (127), 16 states have call predecessors, (127), 14 states have return successors, (125), 115 states have call predecessors, (125), 125 states have call successors, (125) [2022-03-19 04:50:04,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 768 transitions. [2022-03-19 04:50:04,851 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 768 transitions. Word has length 113 [2022-03-19 04:50:04,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:50:04,851 INFO L478 AbstractCegarLoop]: Abstraction has 560 states and 768 transitions. [2022-03-19 04:50:04,851 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 8 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2022-03-19 04:50:04,851 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 768 transitions. [2022-03-19 04:50:04,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-03-19 04:50:04,852 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:50:04,852 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 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] [2022-03-19 04:50:04,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-19 04:50:05,068 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:50:05,069 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:50:05,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:50:05,069 INFO L85 PathProgramCache]: Analyzing trace with hash -144297019, now seen corresponding path program 15 times [2022-03-19 04:50:05,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:50:05,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [361602061] [2022-03-19 04:50:05,070 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:50:05,070 INFO L85 PathProgramCache]: Analyzing trace with hash -144297019, now seen corresponding path program 16 times [2022-03-19 04:50:05,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:50:05,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979852325] [2022-03-19 04:50:05,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:50:05,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:50:05,074 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:50:05,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [313113124] [2022-03-19 04:50:05,074 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:50:05,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:50:05,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:50:05,076 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:50:05,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-19 04:50:05,448 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:50:05,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:50:05,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-19 04:50:05,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:50:05,710 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 26 proven. 302 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:50:05,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:50:05,981 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 26 proven. 82 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-03-19 04:50:05,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:50:05,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979852325] [2022-03-19 04:50:05,981 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:50:05,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313113124] [2022-03-19 04:50:05,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313113124] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:50:05,981 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:50:05,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2022-03-19 04:50:05,981 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:50:05,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [361602061] [2022-03-19 04:50:05,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [361602061] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:50:05,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:50:05,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 04:50:05,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797144293] [2022-03-19 04:50:05,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:50:05,982 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 04:50:05,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:50:05,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 04:50:05,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 04:50:05,983 INFO L87 Difference]: Start difference. First operand 560 states and 768 transitions. Second operand has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 14 states have internal predecessors, (80), 14 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) [2022-03-19 04:50:06,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:50:06,315 INFO L93 Difference]: Finished difference Result 781 states and 1101 transitions. [2022-03-19 04:50:06,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-19 04:50:06,316 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 14 states have internal predecessors, (80), 14 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) Word has length 113 [2022-03-19 04:50:06,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:50:06,318 INFO L225 Difference]: With dead ends: 781 [2022-03-19 04:50:06,318 INFO L226 Difference]: Without dead ends: 588 [2022-03-19 04:50:06,319 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 202 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=425, Invalid=631, Unknown=0, NotChecked=0, Total=1056 [2022-03-19 04:50:06,319 INFO L912 BasicCegarLoop]: 63 mSDtfsCounter, 180 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 04:50:06,319 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 262 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 04:50:06,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2022-03-19 04:50:06,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 578. [2022-03-19 04:50:06,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 436 states have (on average 1.2339449541284404) internal successors, (538), 440 states have internal predecessors, (538), 127 states have call successors, (127), 16 states have call predecessors, (127), 14 states have return successors, (125), 121 states have call predecessors, (125), 125 states have call successors, (125) [2022-03-19 04:50:06,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 790 transitions. [2022-03-19 04:50:06,425 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 790 transitions. Word has length 113 [2022-03-19 04:50:06,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:50:06,426 INFO L478 AbstractCegarLoop]: Abstraction has 578 states and 790 transitions. [2022-03-19 04:50:06,426 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 14 states have internal predecessors, (80), 14 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) [2022-03-19 04:50:06,426 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 790 transitions. [2022-03-19 04:50:06,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-03-19 04:50:06,427 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:50:06,427 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 5, 5, 4, 4, 4, 4, 4, 4, 4, 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] [2022-03-19 04:50:06,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-19 04:50:06,631 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-03-19 04:50:06,632 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:50:06,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:50:06,632 INFO L85 PathProgramCache]: Analyzing trace with hash 533963976, now seen corresponding path program 13 times [2022-03-19 04:50:06,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:50:06,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1343436838] [2022-03-19 04:50:06,633 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:50:06,633 INFO L85 PathProgramCache]: Analyzing trace with hash 533963976, now seen corresponding path program 14 times [2022-03-19 04:50:06,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:50:06,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893913540] [2022-03-19 04:50:06,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:50:06,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:50:06,638 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:50:06,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [823789233] [2022-03-19 04:50:06,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:50:06,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:50:06,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:50:06,639 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:50:06,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-19 04:50:06,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:50:06,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:50:06,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-19 04:50:06,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:50:06,880 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 36 proven. 288 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:50:06,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:50:07,065 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 36 proven. 68 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-03-19 04:50:07,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:50:07,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893913540] [2022-03-19 04:50:07,065 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:50:07,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823789233] [2022-03-19 04:50:07,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823789233] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:50:07,065 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:50:07,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2022-03-19 04:50:07,065 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:50:07,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1343436838] [2022-03-19 04:50:07,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1343436838] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:50:07,066 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:50:07,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 04:50:07,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784707803] [2022-03-19 04:50:07,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:50:07,067 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 04:50:07,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:50:07,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 04:50:07,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 04:50:07,067 INFO L87 Difference]: Start difference. First operand 578 states and 790 transitions. Second operand has 15 states, 15 states have (on average 5.466666666666667) internal successors, (82), 14 states have internal predecessors, (82), 14 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) [2022-03-19 04:50:07,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:50:07,366 INFO L93 Difference]: Finished difference Result 791 states and 1114 transitions. [2022-03-19 04:50:07,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-19 04:50:07,366 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.466666666666667) internal successors, (82), 14 states have internal predecessors, (82), 14 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) Word has length 115 [2022-03-19 04:50:07,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:50:07,368 INFO L225 Difference]: With dead ends: 791 [2022-03-19 04:50:07,368 INFO L226 Difference]: Without dead ends: 594 [2022-03-19 04:50:07,369 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 206 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=456, Invalid=666, Unknown=0, NotChecked=0, Total=1122 [2022-03-19 04:50:07,369 INFO L912 BasicCegarLoop]: 63 mSDtfsCounter, 138 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:50:07,369 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 286 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:50:07,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2022-03-19 04:50:07,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 594. [2022-03-19 04:50:07,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 452 states have (on average 1.2256637168141593) internal successors, (554), 452 states have internal predecessors, (554), 127 states have call successors, (127), 16 states have call predecessors, (127), 14 states have return successors, (125), 125 states have call predecessors, (125), 125 states have call successors, (125) [2022-03-19 04:50:07,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 806 transitions. [2022-03-19 04:50:07,487 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 806 transitions. Word has length 115 [2022-03-19 04:50:07,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:50:07,487 INFO L478 AbstractCegarLoop]: Abstraction has 594 states and 806 transitions. [2022-03-19 04:50:07,487 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.466666666666667) internal successors, (82), 14 states have internal predecessors, (82), 14 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) [2022-03-19 04:50:07,487 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 806 transitions. [2022-03-19 04:50:07,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-03-19 04:50:07,488 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:50:07,488 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 6, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:50:07,507 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-03-19 04:50:07,692 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-19 04:50:07,693 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:50:07,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:50:07,693 INFO L85 PathProgramCache]: Analyzing trace with hash 650985841, now seen corresponding path program 7 times [2022-03-19 04:50:07,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:50:07,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [691299555] [2022-03-19 04:50:07,693 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:50:07,693 INFO L85 PathProgramCache]: Analyzing trace with hash 650985841, now seen corresponding path program 8 times [2022-03-19 04:50:07,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:50:07,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131390898] [2022-03-19 04:50:07,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:50:07,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:50:07,698 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:50:07,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [854762513] [2022-03-19 04:50:07,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:50:07,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:50:07,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:50:07,699 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:50:07,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-19 04:50:07,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:50:07,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:50:07,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-19 04:50:07,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:50:07,993 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 24 proven. 356 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:50:07,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:50:08,247 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 24 proven. 92 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-03-19 04:50:08,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:50:08,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131390898] [2022-03-19 04:50:08,247 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:50:08,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854762513] [2022-03-19 04:50:08,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854762513] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:50:08,247 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:50:08,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 24 [2022-03-19 04:50:08,247 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:50:08,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [691299555] [2022-03-19 04:50:08,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [691299555] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:50:08,248 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:50:08,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 04:50:08,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501545381] [2022-03-19 04:50:08,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:50:08,248 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 04:50:08,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:50:08,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 04:50:08,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 04:50:08,249 INFO L87 Difference]: Start difference. First operand 594 states and 806 transitions. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 15 states have internal predecessors, (84), 15 states have call successors, (17), 15 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) [2022-03-19 04:50:08,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:50:08,618 INFO L93 Difference]: Finished difference Result 649 states and 883 transitions. [2022-03-19 04:50:08,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-19 04:50:08,618 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 15 states have internal predecessors, (84), 15 states have call successors, (17), 15 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) Word has length 119 [2022-03-19 04:50:08,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:50:08,620 INFO L225 Difference]: With dead ends: 649 [2022-03-19 04:50:08,620 INFO L226 Difference]: Without dead ends: 638 [2022-03-19 04:50:08,621 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 214 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=419, Invalid=637, Unknown=0, NotChecked=0, Total=1056 [2022-03-19 04:50:08,621 INFO L912 BasicCegarLoop]: 66 mSDtfsCounter, 243 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 04:50:08,621 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 279 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 04:50:08,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2022-03-19 04:50:08,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 616. [2022-03-19 04:50:08,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 460 states have (on average 1.2239130434782608) internal successors, (563), 470 states have internal predecessors, (563), 140 states have call successors, (140), 17 states have call predecessors, (140), 15 states have return successors, (138), 128 states have call predecessors, (138), 138 states have call successors, (138) [2022-03-19 04:50:08,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 841 transitions. [2022-03-19 04:50:08,732 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 841 transitions. Word has length 119 [2022-03-19 04:50:08,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:50:08,732 INFO L478 AbstractCegarLoop]: Abstraction has 616 states and 841 transitions. [2022-03-19 04:50:08,732 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 15 states have internal predecessors, (84), 15 states have call successors, (17), 15 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) [2022-03-19 04:50:08,732 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 841 transitions. [2022-03-19 04:50:08,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-03-19 04:50:08,734 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:50:08,734 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 7, 7, 7, 7, 5, 4, 3, 3, 3, 3, 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] [2022-03-19 04:50:08,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-19 04:50:08,947 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-19 04:50:08,948 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:50:08,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:50:08,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1267134888, now seen corresponding path program 17 times [2022-03-19 04:50:08,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:50:08,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [678162608] [2022-03-19 04:50:08,948 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:50:08,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1267134888, now seen corresponding path program 18 times [2022-03-19 04:50:08,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:50:08,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689713255] [2022-03-19 04:50:08,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:50:08,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:50:08,953 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:50:08,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1561934894] [2022-03-19 04:50:08,953 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:50:08,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:50:08,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:50:08,972 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:50:08,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-19 04:50:09,578 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-03-19 04:50:09,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:50:09,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-19 04:50:09,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:50:09,722 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 28 proven. 370 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:50:09,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:50:09,865 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 28 proven. 106 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-03-19 04:50:09,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:50:09,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689713255] [2022-03-19 04:50:09,865 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:50:09,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561934894] [2022-03-19 04:50:09,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561934894] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:50:09,866 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:50:09,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 24 [2022-03-19 04:50:09,866 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:50:09,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [678162608] [2022-03-19 04:50:09,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [678162608] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:50:09,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:50:09,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 04:50:09,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742719555] [2022-03-19 04:50:09,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:50:09,866 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 04:50:09,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:50:09,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 04:50:09,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 04:50:09,867 INFO L87 Difference]: Start difference. First operand 616 states and 841 transitions. Second operand has 16 states, 16 states have (on average 5.375) internal successors, (86), 15 states have internal predecessors, (86), 15 states have call successors, (17), 15 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) [2022-03-19 04:50:10,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:50:10,272 INFO L93 Difference]: Finished difference Result 837 states and 1174 transitions. [2022-03-19 04:50:10,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-19 04:50:10,273 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.375) internal successors, (86), 15 states have internal predecessors, (86), 15 states have call successors, (17), 15 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) Word has length 121 [2022-03-19 04:50:10,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:50:10,275 INFO L225 Difference]: With dead ends: 837 [2022-03-19 04:50:10,275 INFO L226 Difference]: Without dead ends: 644 [2022-03-19 04:50:10,276 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 218 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=446, Invalid=676, Unknown=0, NotChecked=0, Total=1122 [2022-03-19 04:50:10,278 INFO L912 BasicCegarLoop]: 66 mSDtfsCounter, 224 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 04:50:10,278 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 271 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 04:50:10,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2022-03-19 04:50:10,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 634. [2022-03-19 04:50:10,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 478 states have (on average 1.2238493723849373) internal successors, (585), 482 states have internal predecessors, (585), 140 states have call successors, (140), 17 states have call predecessors, (140), 15 states have return successors, (138), 134 states have call predecessors, (138), 138 states have call successors, (138) [2022-03-19 04:50:10,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 863 transitions. [2022-03-19 04:50:10,394 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 863 transitions. Word has length 121 [2022-03-19 04:50:10,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:50:10,395 INFO L478 AbstractCegarLoop]: Abstraction has 634 states and 863 transitions. [2022-03-19 04:50:10,395 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.375) internal successors, (86), 15 states have internal predecessors, (86), 15 states have call successors, (17), 15 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) [2022-03-19 04:50:10,395 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 863 transitions. [2022-03-19 04:50:10,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-03-19 04:50:10,396 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:50:10,396 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:50:10,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-19 04:50:10,601 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-19 04:50:10,602 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:50:10,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:50:10,602 INFO L85 PathProgramCache]: Analyzing trace with hash 487500267, now seen corresponding path program 15 times [2022-03-19 04:50:10,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:50:10,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1559705455] [2022-03-19 04:50:10,603 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:50:10,603 INFO L85 PathProgramCache]: Analyzing trace with hash 487500267, now seen corresponding path program 16 times [2022-03-19 04:50:10,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:50:10,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897223490] [2022-03-19 04:50:10,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:50:10,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:50:10,608 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:50:10,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1516646976] [2022-03-19 04:50:10,608 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:50:10,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:50:10,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:50:10,616 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:50:10,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-19 04:50:10,718 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:50:10,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:50:10,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-19 04:50:10,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:50:10,907 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 38 proven. 350 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:50:10,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:50:11,058 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 38 proven. 86 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-03-19 04:50:11,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:50:11,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897223490] [2022-03-19 04:50:11,059 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:50:11,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516646976] [2022-03-19 04:50:11,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516646976] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:50:11,059 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:50:11,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 24 [2022-03-19 04:50:11,059 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:50:11,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1559705455] [2022-03-19 04:50:11,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1559705455] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:50:11,059 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:50:11,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 04:50:11,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448109547] [2022-03-19 04:50:11,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:50:11,060 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 04:50:11,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:50:11,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 04:50:11,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 04:50:11,062 INFO L87 Difference]: Start difference. First operand 634 states and 863 transitions. Second operand has 16 states, 16 states have (on average 5.5) internal successors, (88), 15 states have internal predecessors, (88), 15 states have call successors, (17), 15 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) [2022-03-19 04:50:11,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:50:11,460 INFO L93 Difference]: Finished difference Result 847 states and 1187 transitions. [2022-03-19 04:50:11,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-19 04:50:11,460 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.5) internal successors, (88), 15 states have internal predecessors, (88), 15 states have call successors, (17), 15 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) Word has length 123 [2022-03-19 04:50:11,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:50:11,462 INFO L225 Difference]: With dead ends: 847 [2022-03-19 04:50:11,462 INFO L226 Difference]: Without dead ends: 650 [2022-03-19 04:50:11,463 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 222 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=478, Invalid=712, Unknown=0, NotChecked=0, Total=1190 [2022-03-19 04:50:11,463 INFO L912 BasicCegarLoop]: 66 mSDtfsCounter, 173 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 04:50:11,464 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 292 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 04:50:11,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2022-03-19 04:50:11,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 650. [2022-03-19 04:50:11,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 494 states have (on average 1.2165991902834008) internal successors, (601), 494 states have internal predecessors, (601), 140 states have call successors, (140), 17 states have call predecessors, (140), 15 states have return successors, (138), 138 states have call predecessors, (138), 138 states have call successors, (138) [2022-03-19 04:50:11,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 879 transitions. [2022-03-19 04:50:11,590 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 879 transitions. Word has length 123 [2022-03-19 04:50:11,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:50:11,590 INFO L478 AbstractCegarLoop]: Abstraction has 650 states and 879 transitions. [2022-03-19 04:50:11,591 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.5) internal successors, (88), 15 states have internal predecessors, (88), 15 states have call successors, (17), 15 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) [2022-03-19 04:50:11,591 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 879 transitions. [2022-03-19 04:50:11,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-03-19 04:50:11,592 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:50:11,592 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 7, 7, 7, 7, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:50:11,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-19 04:50:11,807 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:50:11,808 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:50:11,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:50:11,808 INFO L85 PathProgramCache]: Analyzing trace with hash -992818924, now seen corresponding path program 9 times [2022-03-19 04:50:11,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:50:11,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1247652912] [2022-03-19 04:50:11,808 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:50:11,808 INFO L85 PathProgramCache]: Analyzing trace with hash -992818924, now seen corresponding path program 10 times [2022-03-19 04:50:11,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:50:11,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829241630] [2022-03-19 04:50:11,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:50:11,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:50:11,814 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:50:11,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1202232143] [2022-03-19 04:50:11,814 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:50:11,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:50:11,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:50:11,815 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:50:11,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-19 04:50:11,866 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:50:11,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:50:11,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-19 04:50:11,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:50:12,137 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 26 proven. 428 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:50:12,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:50:12,405 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 26 proven. 116 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-03-19 04:50:12,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:50:12,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829241630] [2022-03-19 04:50:12,406 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:50:12,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202232143] [2022-03-19 04:50:12,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202232143] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:50:12,406 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:50:12,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2022-03-19 04:50:12,406 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:50:12,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1247652912] [2022-03-19 04:50:12,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1247652912] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:50:12,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:50:12,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-19 04:50:12,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932949624] [2022-03-19 04:50:12,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:50:12,407 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-19 04:50:12,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:50:12,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-19 04:50:12,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 04:50:12,408 INFO L87 Difference]: Start difference. First operand 650 states and 879 transitions. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 16 states have internal predecessors, (90), 16 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) [2022-03-19 04:50:12,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:50:12,747 INFO L93 Difference]: Finished difference Result 705 states and 956 transitions. [2022-03-19 04:50:12,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-19 04:50:12,747 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 16 states have internal predecessors, (90), 16 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) Word has length 127 [2022-03-19 04:50:12,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:50:12,750 INFO L225 Difference]: With dead ends: 705 [2022-03-19 04:50:12,750 INFO L226 Difference]: Without dead ends: 694 [2022-03-19 04:50:12,750 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 230 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=439, Invalid=683, Unknown=0, NotChecked=0, Total=1122 [2022-03-19 04:50:12,751 INFO L912 BasicCegarLoop]: 69 mSDtfsCounter, 212 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:50:12,751 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 297 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:50:12,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2022-03-19 04:50:12,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 672. [2022-03-19 04:50:12,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 672 states, 502 states have (on average 1.2151394422310757) internal successors, (610), 512 states have internal predecessors, (610), 153 states have call successors, (153), 18 states have call predecessors, (153), 16 states have return successors, (151), 141 states have call predecessors, (151), 151 states have call successors, (151) [2022-03-19 04:50:12,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 914 transitions. [2022-03-19 04:50:12,881 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 914 transitions. Word has length 127 [2022-03-19 04:50:12,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:50:12,881 INFO L478 AbstractCegarLoop]: Abstraction has 672 states and 914 transitions. [2022-03-19 04:50:12,882 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 16 states have internal predecessors, (90), 16 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) [2022-03-19 04:50:12,882 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 914 transitions. [2022-03-19 04:50:12,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-03-19 04:50:12,883 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:50:12,883 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 6, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:50:12,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-19 04:50:13,100 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:50:13,100 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:50:13,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:50:13,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1410231607, now seen corresponding path program 19 times [2022-03-19 04:50:13,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:50:13,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [465336790] [2022-03-19 04:50:13,101 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:50:13,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1410231607, now seen corresponding path program 20 times [2022-03-19 04:50:13,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:50:13,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570733178] [2022-03-19 04:50:13,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:50:13,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:50:13,107 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:50:13,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1099784154] [2022-03-19 04:50:13,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:50:13,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:50:13,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:50:13,109 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:50:13,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-19 04:50:13,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:50:13,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:50:13,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-19 04:50:13,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:50:13,485 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 32 proven. 416 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:50:13,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:50:13,747 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 32 proven. 104 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-03-19 04:50:13,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:50:13,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570733178] [2022-03-19 04:50:13,747 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:50:13,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099784154] [2022-03-19 04:50:13,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099784154] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:50:13,748 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:50:13,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2022-03-19 04:50:13,748 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:50:13,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [465336790] [2022-03-19 04:50:13,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [465336790] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:50:13,748 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:50:13,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-19 04:50:13,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253751727] [2022-03-19 04:50:13,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:50:13,748 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-19 04:50:13,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:50:13,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-19 04:50:13,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 04:50:13,749 INFO L87 Difference]: Start difference. First operand 672 states and 914 transitions. Second operand has 17 states, 17 states have (on average 5.411764705882353) internal successors, (92), 16 states have internal predecessors, (92), 16 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) [2022-03-19 04:50:14,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:50:14,127 INFO L93 Difference]: Finished difference Result 893 states and 1247 transitions. [2022-03-19 04:50:14,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-19 04:50:14,127 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.411764705882353) internal successors, (92), 16 states have internal predecessors, (92), 16 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) Word has length 129 [2022-03-19 04:50:14,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:50:14,130 INFO L225 Difference]: With dead ends: 893 [2022-03-19 04:50:14,130 INFO L226 Difference]: Without dead ends: 700 [2022-03-19 04:50:14,131 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 234 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=467, Invalid=723, Unknown=0, NotChecked=0, Total=1190 [2022-03-19 04:50:14,131 INFO L912 BasicCegarLoop]: 69 mSDtfsCounter, 185 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 04:50:14,131 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 322 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 04:50:14,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2022-03-19 04:50:14,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 690. [2022-03-19 04:50:14,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 690 states, 520 states have (on average 1.2153846153846153) internal successors, (632), 524 states have internal predecessors, (632), 153 states have call successors, (153), 18 states have call predecessors, (153), 16 states have return successors, (151), 147 states have call predecessors, (151), 151 states have call successors, (151) [2022-03-19 04:50:14,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 936 transitions. [2022-03-19 04:50:14,292 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 936 transitions. Word has length 129 [2022-03-19 04:50:14,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:50:14,293 INFO L478 AbstractCegarLoop]: Abstraction has 690 states and 936 transitions. [2022-03-19 04:50:14,293 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.411764705882353) internal successors, (92), 16 states have internal predecessors, (92), 16 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) [2022-03-19 04:50:14,293 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 936 transitions. [2022-03-19 04:50:14,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-03-19 04:50:14,294 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:50:14,295 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 7, 6, 6, 6, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:50:14,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-03-19 04:50:14,507 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-03-19 04:50:14,508 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:50:14,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:50:14,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1255136270, now seen corresponding path program 17 times [2022-03-19 04:50:14,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:50:14,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1049042733] [2022-03-19 04:50:14,508 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:50:14,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1255136270, now seen corresponding path program 18 times [2022-03-19 04:50:14,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:50:14,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465391460] [2022-03-19 04:50:14,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:50:14,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:50:14,513 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:50:14,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1779430717] [2022-03-19 04:50:14,513 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:50:14,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:50:14,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:50:14,515 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:50:14,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-19 04:50:14,686 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-19 04:50:14,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:50:14,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-19 04:50:14,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:50:14,953 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 40 proven. 420 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:50:14,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:50:15,215 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 40 proven. 108 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-03-19 04:50:15,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:50:15,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465391460] [2022-03-19 04:50:15,216 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:50:15,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779430717] [2022-03-19 04:50:15,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779430717] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:50:15,216 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:50:15,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2022-03-19 04:50:15,216 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:50:15,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1049042733] [2022-03-19 04:50:15,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1049042733] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:50:15,216 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:50:15,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-19 04:50:15,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245769188] [2022-03-19 04:50:15,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:50:15,217 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-19 04:50:15,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:50:15,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-19 04:50:15,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 04:50:15,217 INFO L87 Difference]: Start difference. First operand 690 states and 936 transitions. Second operand has 17 states, 17 states have (on average 5.529411764705882) internal successors, (94), 16 states have internal predecessors, (94), 16 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) [2022-03-19 04:50:15,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:50:15,625 INFO L93 Difference]: Finished difference Result 903 states and 1260 transitions. [2022-03-19 04:50:15,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-19 04:50:15,625 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.529411764705882) internal successors, (94), 16 states have internal predecessors, (94), 16 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) Word has length 131 [2022-03-19 04:50:15,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:50:15,627 INFO L225 Difference]: With dead ends: 903 [2022-03-19 04:50:15,628 INFO L226 Difference]: Without dead ends: 706 [2022-03-19 04:50:15,628 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 238 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=500, Invalid=760, Unknown=0, NotChecked=0, Total=1260 [2022-03-19 04:50:15,629 INFO L912 BasicCegarLoop]: 69 mSDtfsCounter, 230 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 04:50:15,629 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 302 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 04:50:15,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2022-03-19 04:50:15,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 706. [2022-03-19 04:50:15,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 536 states have (on average 1.208955223880597) internal successors, (648), 536 states have internal predecessors, (648), 153 states have call successors, (153), 18 states have call predecessors, (153), 16 states have return successors, (151), 151 states have call predecessors, (151), 151 states have call successors, (151) [2022-03-19 04:50:15,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 952 transitions. [2022-03-19 04:50:15,759 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 952 transitions. Word has length 131 [2022-03-19 04:50:15,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:50:15,759 INFO L478 AbstractCegarLoop]: Abstraction has 706 states and 952 transitions. [2022-03-19 04:50:15,759 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.529411764705882) internal successors, (94), 16 states have internal predecessors, (94), 16 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) [2022-03-19 04:50:15,760 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 952 transitions. [2022-03-19 04:50:15,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-03-19 04:50:15,761 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:50:15,761 INFO L500 BasicCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 6, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:50:15,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-03-19 04:50:15,966 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:50:15,966 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:50:15,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:50:15,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1252937077, now seen corresponding path program 11 times [2022-03-19 04:50:15,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:50:15,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1556164664] [2022-03-19 04:50:15,967 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:50:15,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1252937077, now seen corresponding path program 12 times [2022-03-19 04:50:15,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:50:15,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856767493] [2022-03-19 04:50:15,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:50:15,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:50:15,974 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:50:15,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [290403415] [2022-03-19 04:50:15,974 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:50:15,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:50:15,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:50:15,980 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:50:15,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-19 04:50:16,060 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 04:50:16,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:50:16,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-19 04:50:16,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:50:16,361 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 88 proven. 1 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2022-03-19 04:50:16,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:50:18,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:50:18,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856767493] [2022-03-19 04:50:18,332 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:50:18,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290403415] [2022-03-19 04:50:18,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290403415] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 04:50:18,332 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 04:50:18,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-03-19 04:50:18,332 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:50:18,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1556164664] [2022-03-19 04:50:18,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1556164664] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:50:18,332 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:50:18,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 04:50:18,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952790516] [2022-03-19 04:50:18,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:50:18,333 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 04:50:18,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:50:18,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 04:50:18,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=84, Unknown=1, NotChecked=0, Total=110 [2022-03-19 04:50:18,333 INFO L87 Difference]: Start difference. First operand 706 states and 952 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 04:50:20,337 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 [] [2022-03-19 04:50:20,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:50:20,719 INFO L93 Difference]: Finished difference Result 758 states and 1028 transitions. [2022-03-19 04:50:20,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 04:50:20,719 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (9), 2 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 135 [2022-03-19 04:50:20,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:50:20,722 INFO L225 Difference]: With dead ends: 758 [2022-03-19 04:50:20,722 INFO L226 Difference]: Without dead ends: 746 [2022-03-19 04:50:20,722 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 132 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=43, Invalid=138, Unknown=1, NotChecked=0, Total=182 [2022-03-19 04:50:20,723 INFO L912 BasicCegarLoop]: 51 mSDtfsCounter, 28 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-19 04:50:20,723 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 300 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 118 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-03-19 04:50:20,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2022-03-19 04:50:20,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 683. [2022-03-19 04:50:20,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 515 states have (on average 1.192233009708738) internal successors, (614), 522 states have internal predecessors, (614), 150 states have call successors, (150), 19 states have call predecessors, (150), 17 states have return successors, (148), 141 states have call predecessors, (148), 148 states have call successors, (148) [2022-03-19 04:50:20,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 912 transitions. [2022-03-19 04:50:20,871 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 912 transitions. Word has length 135 [2022-03-19 04:50:20,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:50:20,871 INFO L478 AbstractCegarLoop]: Abstraction has 683 states and 912 transitions. [2022-03-19 04:50:20,871 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 04:50:20,871 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 912 transitions. [2022-03-19 04:50:20,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-03-19 04:50:20,873 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:50:20,873 INFO L500 BasicCegarLoop]: trace histogram [15, 14, 14, 8, 8, 8, 8, 6, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:50:20,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-03-19 04:50:21,078 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-03-19 04:50:21,078 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:50:21,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:50:21,078 INFO L85 PathProgramCache]: Analyzing trace with hash 200539575, now seen corresponding path program 13 times [2022-03-19 04:50:21,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:50:21,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [534700040] [2022-03-19 04:50:21,079 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:50:21,079 INFO L85 PathProgramCache]: Analyzing trace with hash 200539575, now seen corresponding path program 14 times [2022-03-19 04:50:21,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:50:21,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804323765] [2022-03-19 04:50:21,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:50:21,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:50:21,086 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:50:21,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [237749529] [2022-03-19 04:50:21,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:50:21,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:50:21,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:50:21,100 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:50:21,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-19 04:50:21,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:50:21,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:50:21,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-19 04:50:21,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:50:21,489 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 28 proven. 508 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:50:21,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:50:21,779 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 28 proven. 144 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2022-03-19 04:50:21,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:50:21,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804323765] [2022-03-19 04:50:21,780 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:50:21,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237749529] [2022-03-19 04:50:21,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237749529] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:50:21,780 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:50:21,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 24 [2022-03-19 04:50:21,780 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:50:21,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [534700040] [2022-03-19 04:50:21,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [534700040] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:50:21,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:50:21,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-19 04:50:21,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405785841] [2022-03-19 04:50:21,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:50:21,781 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-19 04:50:21,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:50:21,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-19 04:50:21,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 04:50:21,781 INFO L87 Difference]: Start difference. First operand 683 states and 912 transitions. Second operand has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 17 states have internal predecessors, (96), 17 states have call successors, (19), 17 states have call predecessors, (19), 15 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) [2022-03-19 04:50:22,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:50:22,219 INFO L93 Difference]: Finished difference Result 734 states and 982 transitions. [2022-03-19 04:50:22,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-19 04:50:22,220 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 17 states have internal predecessors, (96), 17 states have call successors, (19), 17 states have call predecessors, (19), 15 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) Word has length 135 [2022-03-19 04:50:22,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:50:22,222 INFO L225 Difference]: With dead ends: 734 [2022-03-19 04:50:22,222 INFO L226 Difference]: Without dead ends: 729 [2022-03-19 04:50:22,223 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 246 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2022-03-19 04:50:22,223 INFO L912 BasicCegarLoop]: 72 mSDtfsCounter, 227 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 04:50:22,223 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 315 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 04:50:22,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2022-03-19 04:50:22,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 707. [2022-03-19 04:50:22,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 707 states, 525 states have (on average 1.1923809523809523) internal successors, (626), 542 states have internal predecessors, (626), 163 states have call successors, (163), 20 states have call predecessors, (163), 18 states have return successors, (161), 144 states have call predecessors, (161), 161 states have call successors, (161) [2022-03-19 04:50:22,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 950 transitions. [2022-03-19 04:50:22,358 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 950 transitions. Word has length 135 [2022-03-19 04:50:22,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:50:22,358 INFO L478 AbstractCegarLoop]: Abstraction has 707 states and 950 transitions. [2022-03-19 04:50:22,358 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 17 states have internal predecessors, (96), 17 states have call successors, (19), 17 states have call predecessors, (19), 15 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) [2022-03-19 04:50:22,358 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 950 transitions. [2022-03-19 04:50:22,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-03-19 04:50:22,360 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:50:22,360 INFO L500 BasicCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:50:22,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-19 04:50:22,576 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:50:22,577 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:50:22,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:50:22,577 INFO L85 PathProgramCache]: Analyzing trace with hash -972958086, now seen corresponding path program 21 times [2022-03-19 04:50:22,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:50:22,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [263416228] [2022-03-19 04:50:22,577 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:50:22,578 INFO L85 PathProgramCache]: Analyzing trace with hash -972958086, now seen corresponding path program 22 times [2022-03-19 04:50:22,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:50:22,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222231289] [2022-03-19 04:50:22,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:50:22,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:50:22,582 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:50:22,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [937725966] [2022-03-19 04:50:22,582 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:50:22,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:50:22,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:50:22,583 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:50:22,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-19 04:50:22,646 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:50:22,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:50:22,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-19 04:50:22,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:50:23,939 INFO L134 CoverageAnalysis]: Checked inductivity of 524 backedges. 47 proven. 112 refuted. 0 times theorem prover too weak. 365 trivial. 0 not checked. [2022-03-19 04:50:23,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:50:24,863 INFO L134 CoverageAnalysis]: Checked inductivity of 524 backedges. 67 proven. 92 refuted. 0 times theorem prover too weak. 365 trivial. 0 not checked. [2022-03-19 04:50:24,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:50:24,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222231289] [2022-03-19 04:50:24,863 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:50:24,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937725966] [2022-03-19 04:50:24,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937725966] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:50:24,863 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:50:24,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2022-03-19 04:50:24,864 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:50:24,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [263416228] [2022-03-19 04:50:24,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [263416228] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:50:24,864 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:50:24,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 04:50:24,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757535740] [2022-03-19 04:50:24,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:50:24,864 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 04:50:24,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:50:24,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 04:50:24,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2022-03-19 04:50:24,865 INFO L87 Difference]: Start difference. First operand 707 states and 950 transitions. Second operand has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 10 states have internal predecessors, (62), 8 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 8 states have call predecessors, (17), 7 states have call successors, (17) [2022-03-19 04:50:26,981 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 [] [2022-03-19 04:50:27,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:50:27,230 INFO L93 Difference]: Finished difference Result 964 states and 1336 transitions. [2022-03-19 04:50:27,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 04:50:27,230 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 10 states have internal predecessors, (62), 8 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 8 states have call predecessors, (17), 7 states have call successors, (17) Word has length 137 [2022-03-19 04:50:27,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:50:27,233 INFO L225 Difference]: With dead ends: 964 [2022-03-19 04:50:27,233 INFO L226 Difference]: Without dead ends: 851 [2022-03-19 04:50:27,234 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2022-03-19 04:50:27,234 INFO L912 BasicCegarLoop]: 79 mSDtfsCounter, 28 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 171 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:50:27,234 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 599 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 40 Invalid, 1 Unknown, 171 Unchecked, 2.1s Time] [2022-03-19 04:50:27,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 851 states. [2022-03-19 04:50:27,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 851 to 707. [2022-03-19 04:50:27,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 707 states, 525 states have (on average 1.1923809523809523) internal successors, (626), 542 states have internal predecessors, (626), 163 states have call successors, (163), 20 states have call predecessors, (163), 18 states have return successors, (161), 144 states have call predecessors, (161), 161 states have call successors, (161) [2022-03-19 04:50:27,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 950 transitions. [2022-03-19 04:50:27,376 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 950 transitions. Word has length 137 [2022-03-19 04:50:27,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:50:27,376 INFO L478 AbstractCegarLoop]: Abstraction has 707 states and 950 transitions. [2022-03-19 04:50:27,376 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 10 states have internal predecessors, (62), 8 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 8 states have call predecessors, (17), 7 states have call successors, (17) [2022-03-19 04:50:27,376 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 950 transitions. [2022-03-19 04:50:27,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-03-19 04:50:27,378 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:50:27,378 INFO L500 BasicCegarLoop]: trace histogram [15, 14, 14, 7, 7, 7, 7, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:50:27,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-03-19 04:50:27,594 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:50:27,595 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:50:27,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:50:27,595 INFO L85 PathProgramCache]: Analyzing trace with hash -134259028, now seen corresponding path program 23 times [2022-03-19 04:50:27,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:50:27,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [565138125] [2022-03-19 04:50:27,596 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:50:27,596 INFO L85 PathProgramCache]: Analyzing trace with hash -134259028, now seen corresponding path program 24 times [2022-03-19 04:50:27,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:50:27,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610015952] [2022-03-19 04:50:27,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:50:27,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:50:27,600 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:50:27,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [573811119] [2022-03-19 04:50:27,600 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:50:27,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:50:27,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:50:27,602 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:50:27,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-19 04:50:27,766 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-19 04:50:27,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:50:27,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-19 04:50:27,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:50:28,066 INFO L134 CoverageAnalysis]: Checked inductivity of 530 backedges. 28 proven. 498 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:50:28,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:50:28,370 INFO L134 CoverageAnalysis]: Checked inductivity of 530 backedges. 28 proven. 134 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2022-03-19 04:50:28,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:50:28,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610015952] [2022-03-19 04:50:28,370 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:50:28,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573811119] [2022-03-19 04:50:28,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573811119] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:50:28,370 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:50:28,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 24 [2022-03-19 04:50:28,371 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:50:28,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [565138125] [2022-03-19 04:50:28,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [565138125] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:50:28,371 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:50:28,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-19 04:50:28,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608124079] [2022-03-19 04:50:28,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:50:28,371 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-19 04:50:28,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:50:28,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-19 04:50:28,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 04:50:28,372 INFO L87 Difference]: Start difference. First operand 707 states and 950 transitions. Second operand has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 18 states have internal predecessors, (98), 17 states have call successors, (19), 17 states have call predecessors, (19), 15 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) [2022-03-19 04:50:28,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:50:28,897 INFO L93 Difference]: Finished difference Result 807 states and 1089 transitions. [2022-03-19 04:50:28,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-19 04:50:28,897 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 18 states have internal predecessors, (98), 17 states have call successors, (19), 17 states have call predecessors, (19), 15 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) Word has length 137 [2022-03-19 04:50:28,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:50:28,901 INFO L225 Difference]: With dead ends: 807 [2022-03-19 04:50:28,901 INFO L226 Difference]: Without dead ends: 802 [2022-03-19 04:50:28,901 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 250 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=479, Invalid=781, Unknown=0, NotChecked=0, Total=1260 [2022-03-19 04:50:28,902 INFO L912 BasicCegarLoop]: 75 mSDtfsCounter, 321 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 04:50:28,902 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 344 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 04:50:28,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2022-03-19 04:50:29,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 775. [2022-03-19 04:50:29,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 579 states have (on average 1.2037996545768566) internal successors, (697), 596 states have internal predecessors, (697), 176 states have call successors, (176), 21 states have call predecessors, (176), 19 states have return successors, (174), 157 states have call predecessors, (174), 174 states have call successors, (174) [2022-03-19 04:50:29,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 1047 transitions. [2022-03-19 04:50:29,079 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 1047 transitions. Word has length 137 [2022-03-19 04:50:29,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:50:29,079 INFO L478 AbstractCegarLoop]: Abstraction has 775 states and 1047 transitions. [2022-03-19 04:50:29,079 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 18 states have internal predecessors, (98), 17 states have call successors, (19), 17 states have call predecessors, (19), 15 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) [2022-03-19 04:50:29,079 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 1047 transitions. [2022-03-19 04:50:29,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-03-19 04:50:29,081 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:50:29,081 INFO L500 BasicCegarLoop]: trace histogram [15, 14, 14, 8, 7, 7, 7, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:50:29,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-19 04:50:29,285 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-03-19 04:50:29,285 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:50:29,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:50:29,286 INFO L85 PathProgramCache]: Analyzing trace with hash -895861967, now seen corresponding path program 19 times [2022-03-19 04:50:29,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:50:29,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [64301559] [2022-03-19 04:50:29,286 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:50:29,286 INFO L85 PathProgramCache]: Analyzing trace with hash -895861967, now seen corresponding path program 20 times [2022-03-19 04:50:29,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:50:29,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439812468] [2022-03-19 04:50:29,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:50:29,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:50:29,291 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:50:29,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [867638997] [2022-03-19 04:50:29,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:50:29,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:50:29,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:50:29,292 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:50:29,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-19 04:50:29,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:50:29,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:50:29,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-19 04:50:29,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:50:29,651 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 42 proven. 498 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:50:29,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:50:29,927 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 42 proven. 134 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2022-03-19 04:50:29,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:50:29,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439812468] [2022-03-19 04:50:29,928 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:50:29,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867638997] [2022-03-19 04:50:29,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867638997] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:50:29,928 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:50:29,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 24 [2022-03-19 04:50:29,928 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:50:29,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [64301559] [2022-03-19 04:50:29,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [64301559] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:50:29,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:50:29,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-19 04:50:29,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112494800] [2022-03-19 04:50:29,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:50:29,929 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-19 04:50:29,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:50:29,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-19 04:50:29,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 04:50:29,929 INFO L87 Difference]: Start difference. First operand 775 states and 1047 transitions. Second operand has 18 states, 18 states have (on average 5.555555555555555) internal successors, (100), 17 states have internal predecessors, (100), 17 states have call successors, (19), 17 states have call predecessors, (19), 15 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) [2022-03-19 04:50:30,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:50:30,427 INFO L93 Difference]: Finished difference Result 945 states and 1302 transitions. [2022-03-19 04:50:30,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-19 04:50:30,427 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.555555555555555) internal successors, (100), 17 states have internal predecessors, (100), 17 states have call successors, (19), 17 states have call predecessors, (19), 15 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) Word has length 139 [2022-03-19 04:50:30,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:50:30,430 INFO L225 Difference]: With dead ends: 945 [2022-03-19 04:50:30,430 INFO L226 Difference]: Without dead ends: 775 [2022-03-19 04:50:30,431 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 254 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=522, Invalid=810, Unknown=0, NotChecked=0, Total=1332 [2022-03-19 04:50:30,431 INFO L912 BasicCegarLoop]: 72 mSDtfsCounter, 276 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 04:50:30,431 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [276 Valid, 311 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 04:50:30,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2022-03-19 04:50:30,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 775. [2022-03-19 04:50:30,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 579 states have (on average 1.1934369602763386) internal successors, (691), 596 states have internal predecessors, (691), 176 states have call successors, (176), 21 states have call predecessors, (176), 19 states have return successors, (174), 157 states have call predecessors, (174), 174 states have call successors, (174) [2022-03-19 04:50:30,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 1041 transitions. [2022-03-19 04:50:30,613 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 1041 transitions. Word has length 139 [2022-03-19 04:50:30,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:50:30,613 INFO L478 AbstractCegarLoop]: Abstraction has 775 states and 1041 transitions. [2022-03-19 04:50:30,613 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.555555555555555) internal successors, (100), 17 states have internal predecessors, (100), 17 states have call successors, (19), 17 states have call predecessors, (19), 15 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) [2022-03-19 04:50:30,613 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 1041 transitions. [2022-03-19 04:50:30,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-03-19 04:50:30,615 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:50:30,615 INFO L500 BasicCegarLoop]: trace histogram [16, 15, 15, 7, 7, 7, 7, 6, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:50:30,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-19 04:50:30,827 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-03-19 04:50:30,829 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:50:30,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:50:30,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1908608861, now seen corresponding path program 25 times [2022-03-19 04:50:30,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:50:30,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [173756560] [2022-03-19 04:50:30,829 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:50:30,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1908608861, now seen corresponding path program 26 times [2022-03-19 04:50:30,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:50:30,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006956235] [2022-03-19 04:50:30,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:50:30,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:50:30,834 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:50:30,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1381104109] [2022-03-19 04:50:30,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:50:30,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:50:30,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:50:30,836 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:50:30,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-19 04:50:30,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:50:30,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:50:30,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-19 04:50:30,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:50:31,201 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 36 proven. 566 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:50:31,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:50:31,485 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 36 proven. 146 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2022-03-19 04:50:31,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:50:31,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006956235] [2022-03-19 04:50:31,485 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:50:31,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381104109] [2022-03-19 04:50:31,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381104109] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:50:31,485 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:50:31,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 24 [2022-03-19 04:50:31,485 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:50:31,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [173756560] [2022-03-19 04:50:31,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [173756560] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:50:31,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:50:31,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-19 04:50:31,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977955027] [2022-03-19 04:50:31,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:50:31,486 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-19 04:50:31,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:50:31,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-19 04:50:31,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 04:50:31,487 INFO L87 Difference]: Start difference. First operand 775 states and 1041 transitions. Second operand has 19 states, 19 states have (on average 5.473684210526316) internal successors, (104), 18 states have internal predecessors, (104), 18 states have call successors, (20), 18 states have call predecessors, (20), 16 states have return successors, (18), 16 states have call predecessors, (18), 17 states have call successors, (18) [2022-03-19 04:50:31,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:50:31,992 INFO L93 Difference]: Finished difference Result 981 states and 1345 transitions. [2022-03-19 04:50:31,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-19 04:50:31,993 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.473684210526316) internal successors, (104), 18 states have internal predecessors, (104), 18 states have call successors, (20), 18 states have call predecessors, (20), 16 states have return successors, (18), 16 states have call predecessors, (18), 17 states have call successors, (18) Word has length 145 [2022-03-19 04:50:31,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:50:31,995 INFO L225 Difference]: With dead ends: 981 [2022-03-19 04:50:31,995 INFO L226 Difference]: Without dead ends: 789 [2022-03-19 04:50:31,996 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 266 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=509, Invalid=823, Unknown=0, NotChecked=0, Total=1332 [2022-03-19 04:50:31,996 INFO L912 BasicCegarLoop]: 75 mSDtfsCounter, 235 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 04:50:31,996 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 341 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 04:50:31,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2022-03-19 04:50:32,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 778. [2022-03-19 04:50:32,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 778 states, 582 states have (on average 1.1872852233676976) internal successors, (691), 594 states have internal predecessors, (691), 176 states have call successors, (176), 21 states have call predecessors, (176), 19 states have return successors, (174), 162 states have call predecessors, (174), 174 states have call successors, (174) [2022-03-19 04:50:32,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 1041 transitions. [2022-03-19 04:50:32,156 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 1041 transitions. Word has length 145 [2022-03-19 04:50:32,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:50:32,156 INFO L478 AbstractCegarLoop]: Abstraction has 778 states and 1041 transitions. [2022-03-19 04:50:32,157 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.473684210526316) internal successors, (104), 18 states have internal predecessors, (104), 18 states have call successors, (20), 18 states have call predecessors, (20), 16 states have return successors, (18), 16 states have call predecessors, (18), 17 states have call successors, (18) [2022-03-19 04:50:32,157 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 1041 transitions. [2022-03-19 04:50:32,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-03-19 04:50:32,158 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:50:32,158 INFO L500 BasicCegarLoop]: trace histogram [16, 15, 15, 9, 8, 8, 8, 6, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:50:32,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-03-19 04:50:32,371 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-19 04:50:32,371 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:50:32,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:50:32,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1963931820, now seen corresponding path program 21 times [2022-03-19 04:50:32,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:50:32,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1710027515] [2022-03-19 04:50:32,372 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:50:32,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1963931820, now seen corresponding path program 22 times [2022-03-19 04:50:32,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:50:32,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856877686] [2022-03-19 04:50:32,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:50:32,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:50:32,377 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:50:32,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1051051747] [2022-03-19 04:50:32,377 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:50:32,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:50:32,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:50:32,392 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:50:32,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-19 04:50:32,547 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:50:32,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:50:32,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-19 04:50:32,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:50:32,840 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 44 proven. 584 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:50:32,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:50:33,144 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 44 proven. 164 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2022-03-19 04:50:33,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:50:33,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856877686] [2022-03-19 04:50:33,144 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:50:33,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051051747] [2022-03-19 04:50:33,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051051747] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:50:33,144 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:50:33,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 24 [2022-03-19 04:50:33,144 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:50:33,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1710027515] [2022-03-19 04:50:33,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1710027515] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:50:33,145 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:50:33,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-19 04:50:33,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632587895] [2022-03-19 04:50:33,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:50:33,145 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-19 04:50:33,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:50:33,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-19 04:50:33,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 04:50:33,146 INFO L87 Difference]: Start difference. First operand 778 states and 1041 transitions. Second operand has 19 states, 19 states have (on average 5.578947368421052) internal successors, (106), 18 states have internal predecessors, (106), 18 states have call successors, (20), 18 states have call predecessors, (20), 16 states have return successors, (18), 16 states have call predecessors, (18), 17 states have call successors, (18) [2022-03-19 04:50:33,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:50:33,666 INFO L93 Difference]: Finished difference Result 965 states and 1319 transitions. [2022-03-19 04:50:33,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-19 04:50:33,666 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.578947368421052) internal successors, (106), 18 states have internal predecessors, (106), 18 states have call successors, (20), 18 states have call predecessors, (20), 16 states have return successors, (18), 16 states have call predecessors, (18), 17 states have call successors, (18) Word has length 147 [2022-03-19 04:50:33,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:50:33,669 INFO L225 Difference]: With dead ends: 965 [2022-03-19 04:50:33,669 INFO L226 Difference]: Without dead ends: 795 [2022-03-19 04:50:33,670 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 270 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=544, Invalid=862, Unknown=0, NotChecked=0, Total=1406 [2022-03-19 04:50:33,670 INFO L912 BasicCegarLoop]: 75 mSDtfsCounter, 266 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 04:50:33,670 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 321 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 04:50:33,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2022-03-19 04:50:33,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 795. [2022-03-19 04:50:33,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 795 states, 599 states have (on average 1.1819699499165275) internal successors, (708), 606 states have internal predecessors, (708), 176 states have call successors, (176), 21 states have call predecessors, (176), 19 states have return successors, (174), 167 states have call predecessors, (174), 174 states have call successors, (174) [2022-03-19 04:50:33,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 1058 transitions. [2022-03-19 04:50:33,843 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 1058 transitions. Word has length 147 [2022-03-19 04:50:33,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:50:33,843 INFO L478 AbstractCegarLoop]: Abstraction has 795 states and 1058 transitions. [2022-03-19 04:50:33,844 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.578947368421052) internal successors, (106), 18 states have internal predecessors, (106), 18 states have call successors, (20), 18 states have call predecessors, (20), 16 states have return successors, (18), 16 states have call predecessors, (18), 17 states have call successors, (18) [2022-03-19 04:50:33,844 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 1058 transitions. [2022-03-19 04:50:33,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-03-19 04:50:33,845 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:50:33,846 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 7, 7, 7, 7, 6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:50:33,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-03-19 04:50:34,062 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:50:34,062 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:50:34,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:50:34,062 INFO L85 PathProgramCache]: Analyzing trace with hash -913503479, now seen corresponding path program 15 times [2022-03-19 04:50:34,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:50:34,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1106845092] [2022-03-19 04:50:34,063 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:50:34,063 INFO L85 PathProgramCache]: Analyzing trace with hash -913503479, now seen corresponding path program 16 times [2022-03-19 04:50:34,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:50:34,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618069560] [2022-03-19 04:50:34,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:50:34,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:50:34,071 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:50:34,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [508944937] [2022-03-19 04:50:34,071 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:50:34,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:50:34,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:50:34,076 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:50:34,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-19 04:50:34,200 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:50:34,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:50:34,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-19 04:50:34,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:50:34,554 INFO L134 CoverageAnalysis]: Checked inductivity of 678 backedges. 32 proven. 642 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:50:34,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:50:34,834 INFO L134 CoverageAnalysis]: Checked inductivity of 678 backedges. 32 proven. 162 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-03-19 04:50:34,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:50:34,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618069560] [2022-03-19 04:50:34,835 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:50:34,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508944937] [2022-03-19 04:50:34,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508944937] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:50:34,835 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:50:34,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 24 [2022-03-19 04:50:34,835 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:50:34,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1106845092] [2022-03-19 04:50:34,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1106845092] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:50:34,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:50:34,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-19 04:50:34,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465027594] [2022-03-19 04:50:34,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:50:34,836 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-19 04:50:34,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:50:34,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-19 04:50:34,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 04:50:34,836 INFO L87 Difference]: Start difference. First operand 795 states and 1058 transitions. Second operand has 20 states, 20 states have (on average 5.4) internal successors, (108), 19 states have internal predecessors, (108), 19 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) [2022-03-19 04:50:35,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:50:35,381 INFO L93 Difference]: Finished difference Result 846 states and 1128 transitions. [2022-03-19 04:50:35,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-19 04:50:35,382 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.4) internal successors, (108), 19 states have internal predecessors, (108), 19 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) Word has length 151 [2022-03-19 04:50:35,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:50:35,385 INFO L225 Difference]: With dead ends: 846 [2022-03-19 04:50:35,385 INFO L226 Difference]: Without dead ends: 841 [2022-03-19 04:50:35,385 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 278 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=499, Invalid=833, Unknown=0, NotChecked=0, Total=1332 [2022-03-19 04:50:35,385 INFO L912 BasicCegarLoop]: 78 mSDtfsCounter, 278 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 283 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 283 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 04:50:35,386 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 357 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [283 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 04:50:35,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2022-03-19 04:50:35,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 819. [2022-03-19 04:50:35,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 609 states have (on average 1.1822660098522169) internal successors, (720), 626 states have internal predecessors, (720), 189 states have call successors, (189), 22 states have call predecessors, (189), 20 states have return successors, (187), 170 states have call predecessors, (187), 187 states have call successors, (187) [2022-03-19 04:50:35,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 1096 transitions. [2022-03-19 04:50:35,572 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 1096 transitions. Word has length 151 [2022-03-19 04:50:35,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:50:35,572 INFO L478 AbstractCegarLoop]: Abstraction has 819 states and 1096 transitions. [2022-03-19 04:50:35,572 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.4) internal successors, (108), 19 states have internal predecessors, (108), 19 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) [2022-03-19 04:50:35,573 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 1096 transitions. [2022-03-19 04:50:35,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-03-19 04:50:35,574 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:50:35,574 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 8, 8, 8, 8, 6, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:50:35,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-03-19 04:50:35,782 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-03-19 04:50:35,782 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:50:35,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:50:35,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1031451968, now seen corresponding path program 27 times [2022-03-19 04:50:35,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:50:35,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1495543857] [2022-03-19 04:50:35,783 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:50:35,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1031451968, now seen corresponding path program 28 times [2022-03-19 04:50:35,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:50:35,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949415062] [2022-03-19 04:50:35,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:50:35,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:50:35,804 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:50:35,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1987140649] [2022-03-19 04:50:35,804 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:50:35,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:50:35,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:50:35,806 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:50:35,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-19 04:50:35,855 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:50:35,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:50:35,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-19 04:50:35,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:50:36,227 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 38 proven. 654 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:50:36,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:50:36,512 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 38 proven. 174 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-03-19 04:50:36,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:50:36,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949415062] [2022-03-19 04:50:36,512 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:50:36,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987140649] [2022-03-19 04:50:36,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987140649] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:50:36,513 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:50:36,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 24 [2022-03-19 04:50:36,513 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:50:36,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1495543857] [2022-03-19 04:50:36,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1495543857] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:50:36,513 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:50:36,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-19 04:50:36,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622817870] [2022-03-19 04:50:36,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:50:36,514 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-19 04:50:36,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:50:36,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-19 04:50:36,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 04:50:36,514 INFO L87 Difference]: Start difference. First operand 819 states and 1096 transitions. Second operand has 20 states, 20 states have (on average 5.5) internal successors, (110), 19 states have internal predecessors, (110), 19 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) [2022-03-19 04:50:37,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:50:37,139 INFO L93 Difference]: Finished difference Result 1023 states and 1398 transitions. [2022-03-19 04:50:37,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-19 04:50:37,139 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.5) internal successors, (110), 19 states have internal predecessors, (110), 19 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) Word has length 153 [2022-03-19 04:50:37,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:50:37,143 INFO L225 Difference]: With dead ends: 1023 [2022-03-19 04:50:37,143 INFO L226 Difference]: Without dead ends: 845 [2022-03-19 04:50:37,144 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 282 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=530, Invalid=876, Unknown=0, NotChecked=0, Total=1406 [2022-03-19 04:50:37,145 INFO L912 BasicCegarLoop]: 78 mSDtfsCounter, 272 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 04:50:37,145 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 359 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 04:50:37,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2022-03-19 04:50:37,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 834. [2022-03-19 04:50:37,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 624 states have (on average 1.1826923076923077) internal successors, (738), 636 states have internal predecessors, (738), 189 states have call successors, (189), 22 states have call predecessors, (189), 20 states have return successors, (187), 175 states have call predecessors, (187), 187 states have call successors, (187) [2022-03-19 04:50:37,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 1114 transitions. [2022-03-19 04:50:37,320 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 1114 transitions. Word has length 153 [2022-03-19 04:50:37,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:50:37,321 INFO L478 AbstractCegarLoop]: Abstraction has 834 states and 1114 transitions. [2022-03-19 04:50:37,321 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.5) internal successors, (110), 19 states have internal predecessors, (110), 19 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) [2022-03-19 04:50:37,321 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 1114 transitions. [2022-03-19 04:50:37,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-03-19 04:50:37,322 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:50:37,323 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 10, 9, 9, 9, 7, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:50:37,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-03-19 04:50:37,535 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:50:37,535 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:50:37,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:50:37,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1196851319, now seen corresponding path program 23 times [2022-03-19 04:50:37,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:50:37,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2051402176] [2022-03-19 04:50:37,536 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:50:37,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1196851319, now seen corresponding path program 24 times [2022-03-19 04:50:37,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:50:37,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599844069] [2022-03-19 04:50:37,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:50:37,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:50:37,540 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:50:37,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [166453888] [2022-03-19 04:50:37,541 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:50:37,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:50:37,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:50:37,542 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:50:37,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-19 04:50:37,764 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-19 04:50:37,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:50:37,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-19 04:50:37,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:50:38,116 INFO L134 CoverageAnalysis]: Checked inductivity of 728 backedges. 46 proven. 678 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:50:38,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:50:38,399 INFO L134 CoverageAnalysis]: Checked inductivity of 728 backedges. 46 proven. 198 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-03-19 04:50:38,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:50:38,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599844069] [2022-03-19 04:50:38,399 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:50:38,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166453888] [2022-03-19 04:50:38,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166453888] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:50:38,400 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:50:38,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 24 [2022-03-19 04:50:38,400 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:50:38,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2051402176] [2022-03-19 04:50:38,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2051402176] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:50:38,400 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:50:38,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-19 04:50:38,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431814360] [2022-03-19 04:50:38,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:50:38,400 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-19 04:50:38,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:50:38,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-19 04:50:38,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 04:50:38,401 INFO L87 Difference]: Start difference. First operand 834 states and 1114 transitions. Second operand has 20 states, 20 states have (on average 5.6) internal successors, (112), 19 states have internal predecessors, (112), 19 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) [2022-03-19 04:50:38,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:50:38,976 INFO L93 Difference]: Finished difference Result 1021 states and 1392 transitions. [2022-03-19 04:50:38,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-19 04:50:38,976 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.6) internal successors, (112), 19 states have internal predecessors, (112), 19 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) Word has length 155 [2022-03-19 04:50:38,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:50:38,979 INFO L225 Difference]: With dead ends: 1021 [2022-03-19 04:50:38,979 INFO L226 Difference]: Without dead ends: 851 [2022-03-19 04:50:38,980 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 286 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=566, Invalid=916, Unknown=0, NotChecked=0, Total=1482 [2022-03-19 04:50:38,980 INFO L912 BasicCegarLoop]: 78 mSDtfsCounter, 267 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 04:50:38,980 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 368 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 04:50:38,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 851 states. [2022-03-19 04:50:39,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 851 to 851. [2022-03-19 04:50:39,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 641 states have (on average 1.1778471138845554) internal successors, (755), 648 states have internal predecessors, (755), 189 states have call successors, (189), 22 states have call predecessors, (189), 20 states have return successors, (187), 180 states have call predecessors, (187), 187 states have call successors, (187) [2022-03-19 04:50:39,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 1131 transitions. [2022-03-19 04:50:39,173 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 1131 transitions. Word has length 155 [2022-03-19 04:50:39,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:50:39,173 INFO L478 AbstractCegarLoop]: Abstraction has 851 states and 1131 transitions. [2022-03-19 04:50:39,173 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.6) internal successors, (112), 19 states have internal predecessors, (112), 19 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) [2022-03-19 04:50:39,173 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 1131 transitions. [2022-03-19 04:50:39,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-03-19 04:50:39,175 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:50:39,175 INFO L500 BasicCegarLoop]: trace histogram [18, 17, 17, 8, 8, 8, 8, 6, 6, 6, 6, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:50:39,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-03-19 04:50:39,380 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:50:39,380 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:50:39,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:50:39,380 INFO L85 PathProgramCache]: Analyzing trace with hash -61113684, now seen corresponding path program 17 times [2022-03-19 04:50:39,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:50:39,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [631102123] [2022-03-19 04:50:39,381 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:50:39,381 INFO L85 PathProgramCache]: Analyzing trace with hash -61113684, now seen corresponding path program 18 times [2022-03-19 04:50:39,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:50:39,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256145022] [2022-03-19 04:50:39,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:50:39,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:50:39,387 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:50:39,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [877886420] [2022-03-19 04:50:39,387 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:50:39,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:50:39,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:50:39,388 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:50:39,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-19 04:50:40,056 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-19 04:50:40,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:50:40,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-19 04:50:40,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:50:40,433 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 34 proven. 734 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:50:40,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:50:40,712 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 34 proven. 190 refuted. 0 times theorem prover too weak. 548 trivial. 0 not checked. [2022-03-19 04:50:40,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:50:40,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256145022] [2022-03-19 04:50:40,713 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:50:40,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877886420] [2022-03-19 04:50:40,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877886420] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:50:40,713 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:50:40,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 24 [2022-03-19 04:50:40,713 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:50:40,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [631102123] [2022-03-19 04:50:40,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [631102123] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:50:40,713 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:50:40,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-19 04:50:40,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169130010] [2022-03-19 04:50:40,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:50:40,714 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-19 04:50:40,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:50:40,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-19 04:50:40,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 04:50:40,714 INFO L87 Difference]: Start difference. First operand 851 states and 1131 transitions. Second operand has 21 states, 21 states have (on average 5.428571428571429) internal successors, (114), 20 states have internal predecessors, (114), 20 states have call successors, (22), 20 states have call predecessors, (22), 18 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) [2022-03-19 04:50:41,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:50:41,322 INFO L93 Difference]: Finished difference Result 902 states and 1201 transitions. [2022-03-19 04:50:41,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-19 04:50:41,323 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.428571428571429) internal successors, (114), 20 states have internal predecessors, (114), 20 states have call successors, (22), 20 states have call predecessors, (22), 18 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) Word has length 159 [2022-03-19 04:50:41,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:50:41,325 INFO L225 Difference]: With dead ends: 902 [2022-03-19 04:50:41,326 INFO L226 Difference]: Without dead ends: 897 [2022-03-19 04:50:41,326 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 294 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=519, Invalid=887, Unknown=0, NotChecked=0, Total=1406 [2022-03-19 04:50:41,326 INFO L912 BasicCegarLoop]: 81 mSDtfsCounter, 274 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 04:50:41,326 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 389 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 04:50:41,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2022-03-19 04:50:41,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 875. [2022-03-19 04:50:41,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 651 states have (on average 1.1781874039938556) internal successors, (767), 668 states have internal predecessors, (767), 202 states have call successors, (202), 23 states have call predecessors, (202), 21 states have return successors, (200), 183 states have call predecessors, (200), 200 states have call successors, (200) [2022-03-19 04:50:41,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 1169 transitions. [2022-03-19 04:50:41,515 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 1169 transitions. Word has length 159 [2022-03-19 04:50:41,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:50:41,515 INFO L478 AbstractCegarLoop]: Abstraction has 875 states and 1169 transitions. [2022-03-19 04:50:41,516 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.428571428571429) internal successors, (114), 20 states have internal predecessors, (114), 20 states have call successors, (22), 20 states have call predecessors, (22), 18 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) [2022-03-19 04:50:41,516 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 1169 transitions. [2022-03-19 04:50:41,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-03-19 04:50:41,517 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:50:41,517 INFO L500 BasicCegarLoop]: trace histogram [18, 17, 17, 9, 9, 9, 9, 6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:50:41,522 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-03-19 04:50:41,722 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:50:41,722 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:50:41,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:50:41,723 INFO L85 PathProgramCache]: Analyzing trace with hash -160708573, now seen corresponding path program 29 times [2022-03-19 04:50:41,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:50:41,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1738734718] [2022-03-19 04:50:41,723 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:50:41,723 INFO L85 PathProgramCache]: Analyzing trace with hash -160708573, now seen corresponding path program 30 times [2022-03-19 04:50:41,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:50:41,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55375676] [2022-03-19 04:50:41,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:50:41,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:50:41,728 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:50:41,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1228630123] [2022-03-19 04:50:41,728 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:50:41,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:50:41,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:50:41,730 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:50:41,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-19 04:50:42,753 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-19 04:50:42,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:50:42,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-19 04:50:42,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:50:43,087 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 40 proven. 750 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:50:43,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:50:43,331 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 40 proven. 206 refuted. 0 times theorem prover too weak. 548 trivial. 0 not checked. [2022-03-19 04:50:43,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:50:43,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55375676] [2022-03-19 04:50:43,332 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:50:43,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228630123] [2022-03-19 04:50:43,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228630123] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:50:43,332 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:50:43,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 24 [2022-03-19 04:50:43,332 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:50:43,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1738734718] [2022-03-19 04:50:43,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1738734718] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:50:43,332 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:50:43,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-19 04:50:43,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311805998] [2022-03-19 04:50:43,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:50:43,333 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-19 04:50:43,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:50:43,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-19 04:50:43,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 04:50:43,333 INFO L87 Difference]: Start difference. First operand 875 states and 1169 transitions. Second operand has 21 states, 21 states have (on average 5.523809523809524) internal successors, (116), 20 states have internal predecessors, (116), 20 states have call successors, (22), 20 states have call predecessors, (22), 18 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) [2022-03-19 04:50:43,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:50:43,934 INFO L93 Difference]: Finished difference Result 1079 states and 1471 transitions. [2022-03-19 04:50:43,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-19 04:50:43,935 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.523809523809524) internal successors, (116), 20 states have internal predecessors, (116), 20 states have call successors, (22), 20 states have call predecessors, (22), 18 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) Word has length 161 [2022-03-19 04:50:43,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:50:43,951 INFO L225 Difference]: With dead ends: 1079 [2022-03-19 04:50:43,951 INFO L226 Difference]: Without dead ends: 901 [2022-03-19 04:50:43,952 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 298 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=551, Invalid=931, Unknown=0, NotChecked=0, Total=1482 [2022-03-19 04:50:43,952 INFO L912 BasicCegarLoop]: 81 mSDtfsCounter, 306 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 280 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 04:50:43,952 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 366 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [280 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 04:50:43,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 901 states. [2022-03-19 04:50:44,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 901 to 890. [2022-03-19 04:50:44,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 666 states have (on average 1.1786786786786787) internal successors, (785), 678 states have internal predecessors, (785), 202 states have call successors, (202), 23 states have call predecessors, (202), 21 states have return successors, (200), 188 states have call predecessors, (200), 200 states have call successors, (200) [2022-03-19 04:50:44,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 1187 transitions. [2022-03-19 04:50:44,172 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 1187 transitions. Word has length 161 [2022-03-19 04:50:44,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:50:44,172 INFO L478 AbstractCegarLoop]: Abstraction has 890 states and 1187 transitions. [2022-03-19 04:50:44,172 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.523809523809524) internal successors, (116), 20 states have internal predecessors, (116), 20 states have call successors, (22), 20 states have call predecessors, (22), 18 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) [2022-03-19 04:50:44,172 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 1187 transitions. [2022-03-19 04:50:44,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-03-19 04:50:44,174 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:50:44,174 INFO L500 BasicCegarLoop]: trace histogram [18, 17, 17, 8, 7, 7, 7, 7, 6, 6, 6, 5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:50:44,180 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-03-19 04:50:44,380 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:50:44,380 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:50:44,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:50:44,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1942329766, now seen corresponding path program 25 times [2022-03-19 04:50:44,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:50:44,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1088077632] [2022-03-19 04:50:44,381 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:50:44,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1942329766, now seen corresponding path program 26 times [2022-03-19 04:50:44,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:50:44,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913587538] [2022-03-19 04:50:44,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:50:44,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:50:44,386 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:50:44,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [59393695] [2022-03-19 04:50:44,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:50:44,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:50:44,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:50:44,388 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:50:44,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-19 04:50:44,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:50:44,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:50:44,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-19 04:50:44,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:50:44,739 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 54 proven. 726 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:50:44,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:50:44,910 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 54 proven. 182 refuted. 0 times theorem prover too weak. 548 trivial. 0 not checked. [2022-03-19 04:50:44,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:50:44,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913587538] [2022-03-19 04:50:44,911 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:50:44,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59393695] [2022-03-19 04:50:44,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59393695] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:50:44,911 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:50:44,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 24 [2022-03-19 04:50:44,911 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:50:44,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1088077632] [2022-03-19 04:50:44,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1088077632] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:50:44,911 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:50:44,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-19 04:50:44,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776062509] [2022-03-19 04:50:44,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:50:44,912 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-19 04:50:44,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:50:44,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-19 04:50:44,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 04:50:44,912 INFO L87 Difference]: Start difference. First operand 890 states and 1187 transitions. Second operand has 21 states, 21 states have (on average 5.619047619047619) internal successors, (118), 20 states have internal predecessors, (118), 20 states have call successors, (22), 20 states have call predecessors, (22), 18 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) [2022-03-19 04:50:45,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:50:45,423 INFO L93 Difference]: Finished difference Result 1077 states and 1465 transitions. [2022-03-19 04:50:45,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-19 04:50:45,423 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.619047619047619) internal successors, (118), 20 states have internal predecessors, (118), 20 states have call successors, (22), 20 states have call predecessors, (22), 18 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) Word has length 163 [2022-03-19 04:50:45,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:50:45,434 INFO L225 Difference]: With dead ends: 1077 [2022-03-19 04:50:45,434 INFO L226 Difference]: Without dead ends: 907 [2022-03-19 04:50:45,435 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 302 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=588, Invalid=972, Unknown=0, NotChecked=0, Total=1560 [2022-03-19 04:50:45,435 INFO L912 BasicCegarLoop]: 81 mSDtfsCounter, 324 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 311 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 311 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 04:50:45,435 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 365 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [311 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 04:50:45,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2022-03-19 04:50:45,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 907. [2022-03-19 04:50:45,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 907 states, 683 states have (on average 1.1742313323572475) internal successors, (802), 690 states have internal predecessors, (802), 202 states have call successors, (202), 23 states have call predecessors, (202), 21 states have return successors, (200), 193 states have call predecessors, (200), 200 states have call successors, (200) [2022-03-19 04:50:45,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 1204 transitions. [2022-03-19 04:50:45,645 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 1204 transitions. Word has length 163 [2022-03-19 04:50:45,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:50:45,645 INFO L478 AbstractCegarLoop]: Abstraction has 907 states and 1204 transitions. [2022-03-19 04:50:45,645 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.619047619047619) internal successors, (118), 20 states have internal predecessors, (118), 20 states have call successors, (22), 20 states have call predecessors, (22), 18 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) [2022-03-19 04:50:45,645 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 1204 transitions. [2022-03-19 04:50:45,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-03-19 04:50:45,647 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:50:45,647 INFO L500 BasicCegarLoop]: trace histogram [19, 18, 18, 9, 9, 9, 9, 6, 6, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:50:45,664 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-03-19 04:50:45,863 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-03-19 04:50:45,864 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:50:45,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:50:45,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1797417137, now seen corresponding path program 19 times [2022-03-19 04:50:45,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:50:45,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [661712209] [2022-03-19 04:50:45,864 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:50:45,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1797417137, now seen corresponding path program 20 times [2022-03-19 04:50:45,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:50:45,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695765027] [2022-03-19 04:50:45,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:50:45,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:50:45,870 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:50:45,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1949682203] [2022-03-19 04:50:45,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:50:45,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:50:45,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:50:45,871 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:50:45,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-19 04:50:45,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:50:45,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:50:45,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-19 04:50:45,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:50:46,176 INFO L134 CoverageAnalysis]: Checked inductivity of 874 backedges. 36 proven. 834 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:50:46,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:50:46,373 INFO L134 CoverageAnalysis]: Checked inductivity of 874 backedges. 36 proven. 222 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-03-19 04:50:46,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:50:46,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695765027] [2022-03-19 04:50:46,373 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:50:46,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949682203] [2022-03-19 04:50:46,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949682203] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:50:46,373 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:50:46,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2022-03-19 04:50:46,374 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:50:46,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [661712209] [2022-03-19 04:50:46,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [661712209] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:50:46,374 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:50:46,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-19 04:50:46,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856971291] [2022-03-19 04:50:46,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:50:46,374 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-19 04:50:46,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:50:46,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-19 04:50:46,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 04:50:46,375 INFO L87 Difference]: Start difference. First operand 907 states and 1204 transitions. Second operand has 22 states, 22 states have (on average 5.454545454545454) internal successors, (120), 21 states have internal predecessors, (120), 21 states have call successors, (23), 21 states have call predecessors, (23), 19 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2022-03-19 04:50:46,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:50:46,951 INFO L93 Difference]: Finished difference Result 958 states and 1274 transitions. [2022-03-19 04:50:46,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-19 04:50:46,951 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.454545454545454) internal successors, (120), 21 states have internal predecessors, (120), 21 states have call successors, (23), 21 states have call predecessors, (23), 19 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) Word has length 167 [2022-03-19 04:50:46,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:50:46,959 INFO L225 Difference]: With dead ends: 958 [2022-03-19 04:50:46,959 INFO L226 Difference]: Without dead ends: 953 [2022-03-19 04:50:46,959 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 310 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=539, Invalid=943, Unknown=0, NotChecked=0, Total=1482 [2022-03-19 04:50:46,959 INFO L912 BasicCegarLoop]: 84 mSDtfsCounter, 365 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 366 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 366 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 04:50:46,960 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [365 Valid, 373 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [366 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 04:50:46,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2022-03-19 04:50:47,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 931. [2022-03-19 04:50:47,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 693 states have (on average 1.1746031746031746) internal successors, (814), 710 states have internal predecessors, (814), 215 states have call successors, (215), 24 states have call predecessors, (215), 22 states have return successors, (213), 196 states have call predecessors, (213), 213 states have call successors, (213) [2022-03-19 04:50:47,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 1242 transitions. [2022-03-19 04:50:47,189 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 1242 transitions. Word has length 167 [2022-03-19 04:50:47,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:50:47,189 INFO L478 AbstractCegarLoop]: Abstraction has 931 states and 1242 transitions. [2022-03-19 04:50:47,189 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.454545454545454) internal successors, (120), 21 states have internal predecessors, (120), 21 states have call successors, (23), 21 states have call predecessors, (23), 19 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2022-03-19 04:50:47,189 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 1242 transitions. [2022-03-19 04:50:47,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-03-19 04:50:47,191 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:50:47,191 INFO L500 BasicCegarLoop]: trace histogram [19, 18, 18, 10, 10, 10, 10, 7, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:50:47,208 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-03-19 04:50:47,403 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-03-19 04:50:47,403 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:50:47,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:50:47,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1993951238, now seen corresponding path program 31 times [2022-03-19 04:50:47,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:50:47,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1802797848] [2022-03-19 04:50:47,404 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:50:47,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1993951238, now seen corresponding path program 32 times [2022-03-19 04:50:47,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:50:47,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123617857] [2022-03-19 04:50:47,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:50:47,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:50:47,409 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:50:47,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1679350648] [2022-03-19 04:50:47,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:50:47,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:50:47,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:50:47,411 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:50:47,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-19 04:50:47,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:50:47,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:50:47,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-19 04:50:47,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:50:47,762 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 42 proven. 854 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:50:47,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:50:48,046 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 42 proven. 242 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-03-19 04:50:48,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:50:48,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123617857] [2022-03-19 04:50:48,047 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:50:48,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679350648] [2022-03-19 04:50:48,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679350648] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:50:48,047 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:50:48,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2022-03-19 04:50:48,047 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:50:48,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1802797848] [2022-03-19 04:50:48,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1802797848] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:50:48,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:50:48,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-19 04:50:48,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043452434] [2022-03-19 04:50:48,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:50:48,048 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-19 04:50:48,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:50:48,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-19 04:50:48,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 04:50:48,048 INFO L87 Difference]: Start difference. First operand 931 states and 1242 transitions. Second operand has 22 states, 22 states have (on average 5.545454545454546) internal successors, (122), 21 states have internal predecessors, (122), 21 states have call successors, (23), 21 states have call predecessors, (23), 19 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2022-03-19 04:50:48,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:50:48,710 INFO L93 Difference]: Finished difference Result 1135 states and 1544 transitions. [2022-03-19 04:50:48,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-19 04:50:48,710 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.545454545454546) internal successors, (122), 21 states have internal predecessors, (122), 21 states have call successors, (23), 21 states have call predecessors, (23), 19 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) Word has length 169 [2022-03-19 04:50:48,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:50:48,713 INFO L225 Difference]: With dead ends: 1135 [2022-03-19 04:50:48,713 INFO L226 Difference]: Without dead ends: 957 [2022-03-19 04:50:48,714 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 314 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=572, Invalid=988, Unknown=0, NotChecked=0, Total=1560 [2022-03-19 04:50:48,714 INFO L912 BasicCegarLoop]: 84 mSDtfsCounter, 292 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 04:50:48,714 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 379 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 04:50:48,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2022-03-19 04:50:48,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 946. [2022-03-19 04:50:48,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 946 states, 708 states have (on average 1.1751412429378532) internal successors, (832), 720 states have internal predecessors, (832), 215 states have call successors, (215), 24 states have call predecessors, (215), 22 states have return successors, (213), 201 states have call predecessors, (213), 213 states have call successors, (213) [2022-03-19 04:50:48,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 946 states to 946 states and 1260 transitions. [2022-03-19 04:50:48,951 INFO L78 Accepts]: Start accepts. Automaton has 946 states and 1260 transitions. Word has length 169 [2022-03-19 04:50:48,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:50:48,951 INFO L478 AbstractCegarLoop]: Abstraction has 946 states and 1260 transitions. [2022-03-19 04:50:48,951 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.545454545454546) internal successors, (122), 21 states have internal predecessors, (122), 21 states have call successors, (23), 21 states have call predecessors, (23), 19 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2022-03-19 04:50:48,952 INFO L276 IsEmpty]: Start isEmpty. Operand 946 states and 1260 transitions. [2022-03-19 04:50:48,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-03-19 04:50:48,954 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:50:48,954 INFO L500 BasicCegarLoop]: trace histogram [19, 18, 18, 9, 8, 8, 8, 7, 6, 6, 6, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:50:48,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-03-19 04:50:49,172 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-03-19 04:50:49,172 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:50:49,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:50:49,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1121656631, now seen corresponding path program 27 times [2022-03-19 04:50:49,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:50:49,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [643978010] [2022-03-19 04:50:49,173 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:50:49,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1121656631, now seen corresponding path program 28 times [2022-03-19 04:50:49,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:50:49,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850028680] [2022-03-19 04:50:49,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:50:49,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:50:49,178 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:50:49,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [271508885] [2022-03-19 04:50:49,178 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:50:49,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:50:49,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:50:49,190 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:50:49,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-19 04:50:49,311 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:50:49,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:50:49,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-19 04:50:49,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:50:49,700 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 56 proven. 824 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:50:49,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:50:49,938 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 56 proven. 212 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-03-19 04:50:49,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:50:49,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850028680] [2022-03-19 04:50:49,939 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:50:49,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271508885] [2022-03-19 04:50:49,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271508885] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:50:49,939 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:50:49,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2022-03-19 04:50:49,939 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:50:49,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [643978010] [2022-03-19 04:50:49,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [643978010] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:50:49,940 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:50:49,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-19 04:50:49,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142826396] [2022-03-19 04:50:49,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:50:49,940 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-19 04:50:49,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:50:49,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-19 04:50:49,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 04:50:49,941 INFO L87 Difference]: Start difference. First operand 946 states and 1260 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 21 states have internal predecessors, (124), 21 states have call successors, (23), 21 states have call predecessors, (23), 19 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2022-03-19 04:50:50,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:50:50,672 INFO L93 Difference]: Finished difference Result 1133 states and 1538 transitions. [2022-03-19 04:50:50,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-19 04:50:50,673 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 21 states have internal predecessors, (124), 21 states have call successors, (23), 21 states have call predecessors, (23), 19 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) Word has length 171 [2022-03-19 04:50:50,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:50:50,682 INFO L225 Difference]: With dead ends: 1133 [2022-03-19 04:50:50,682 INFO L226 Difference]: Without dead ends: 963 [2022-03-19 04:50:50,683 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 318 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=610, Invalid=1030, Unknown=0, NotChecked=0, Total=1640 [2022-03-19 04:50:50,684 INFO L912 BasicCegarLoop]: 84 mSDtfsCounter, 338 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 291 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 291 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 04:50:50,684 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 359 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [291 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 04:50:50,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2022-03-19 04:50:50,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 963. [2022-03-19 04:50:50,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 725 states have (on average 1.1710344827586208) internal successors, (849), 732 states have internal predecessors, (849), 215 states have call successors, (215), 24 states have call predecessors, (215), 22 states have return successors, (213), 206 states have call predecessors, (213), 213 states have call successors, (213) [2022-03-19 04:50:50,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 1277 transitions. [2022-03-19 04:50:50,994 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 1277 transitions. Word has length 171 [2022-03-19 04:50:50,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:50:50,994 INFO L478 AbstractCegarLoop]: Abstraction has 963 states and 1277 transitions. [2022-03-19 04:50:50,994 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 21 states have internal predecessors, (124), 21 states have call successors, (23), 21 states have call predecessors, (23), 19 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2022-03-19 04:50:50,994 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 1277 transitions. [2022-03-19 04:50:50,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-03-19 04:50:50,997 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:50:50,997 INFO L500 BasicCegarLoop]: trace histogram [20, 19, 19, 10, 10, 10, 10, 7, 6, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:50:51,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-03-19 04:50:51,219 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:50:51,219 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:50:51,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:50:51,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1863737586, now seen corresponding path program 21 times [2022-03-19 04:50:51,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:50:51,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [15911988] [2022-03-19 04:50:51,220 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:50:51,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1863737586, now seen corresponding path program 22 times [2022-03-19 04:50:51,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:50:51,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400932824] [2022-03-19 04:50:51,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:50:51,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:50:51,226 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:50:51,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1238846727] [2022-03-19 04:50:51,226 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:50:51,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:50:51,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:50:51,227 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:50:51,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-19 04:50:51,303 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:50:51,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:50:51,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-19 04:50:51,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:50:51,753 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 38 proven. 942 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:50:51,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:50:52,048 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 38 proven. 258 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2022-03-19 04:50:52,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:50:52,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400932824] [2022-03-19 04:50:52,048 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:50:52,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238846727] [2022-03-19 04:50:52,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238846727] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:50:52,049 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:50:52,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2022-03-19 04:50:52,049 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:50:52,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [15911988] [2022-03-19 04:50:52,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [15911988] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:50:52,049 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:50:52,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-19 04:50:52,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703593550] [2022-03-19 04:50:52,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:50:52,049 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-19 04:50:52,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:50:52,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-19 04:50:52,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2022-03-19 04:50:52,050 INFO L87 Difference]: Start difference. First operand 963 states and 1277 transitions. Second operand has 23 states, 23 states have (on average 5.478260869565218) internal successors, (126), 22 states have internal predecessors, (126), 22 states have call successors, (24), 22 states have call predecessors, (24), 20 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) [2022-03-19 04:50:52,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:50:52,777 INFO L93 Difference]: Finished difference Result 1014 states and 1347 transitions. [2022-03-19 04:50:52,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-19 04:50:52,777 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.478260869565218) internal successors, (126), 22 states have internal predecessors, (126), 22 states have call successors, (24), 22 states have call predecessors, (24), 20 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) Word has length 175 [2022-03-19 04:50:52,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:50:52,785 INFO L225 Difference]: With dead ends: 1014 [2022-03-19 04:50:52,785 INFO L226 Difference]: Without dead ends: 1009 [2022-03-19 04:50:52,786 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 327 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=540, Invalid=942, Unknown=0, NotChecked=0, Total=1482 [2022-03-19 04:50:52,787 INFO L912 BasicCegarLoop]: 87 mSDtfsCounter, 368 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 356 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 356 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 04:50:52,789 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [368 Valid, 397 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [356 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 04:50:52,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2022-03-19 04:50:53,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 987. [2022-03-19 04:50:53,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 987 states, 735 states have (on average 1.1714285714285715) internal successors, (861), 752 states have internal predecessors, (861), 228 states have call successors, (228), 25 states have call predecessors, (228), 23 states have return successors, (226), 209 states have call predecessors, (226), 226 states have call successors, (226) [2022-03-19 04:50:53,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 987 states to 987 states and 1315 transitions. [2022-03-19 04:50:53,044 INFO L78 Accepts]: Start accepts. Automaton has 987 states and 1315 transitions. Word has length 175 [2022-03-19 04:50:53,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:50:53,044 INFO L478 AbstractCegarLoop]: Abstraction has 987 states and 1315 transitions. [2022-03-19 04:50:53,044 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.478260869565218) internal successors, (126), 22 states have internal predecessors, (126), 22 states have call successors, (24), 22 states have call predecessors, (24), 20 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) [2022-03-19 04:50:53,044 INFO L276 IsEmpty]: Start isEmpty. Operand 987 states and 1315 transitions. [2022-03-19 04:50:53,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-03-19 04:50:53,046 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:50:53,047 INFO L500 BasicCegarLoop]: trace histogram [20, 19, 19, 9, 9, 9, 9, 7, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:50:53,063 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-03-19 04:50:53,251 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:50:53,251 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:50:53,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:50:53,252 INFO L85 PathProgramCache]: Analyzing trace with hash -743527641, now seen corresponding path program 33 times [2022-03-19 04:50:53,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:50:53,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [321196290] [2022-03-19 04:50:53,252 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:50:53,252 INFO L85 PathProgramCache]: Analyzing trace with hash -743527641, now seen corresponding path program 34 times [2022-03-19 04:50:53,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:50:53,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169272449] [2022-03-19 04:50:53,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:50:53,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:50:53,257 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:50:53,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1933146316] [2022-03-19 04:50:53,257 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:50:53,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:50:53,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:50:53,259 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:50:53,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-19 04:50:53,348 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:50:53,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:50:53,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-19 04:50:53,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:50:53,780 INFO L134 CoverageAnalysis]: Checked inductivity of 974 backedges. 46 proven. 924 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:50:53,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:50:54,053 INFO L134 CoverageAnalysis]: Checked inductivity of 974 backedges. 46 proven. 240 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2022-03-19 04:50:54,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:50:54,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169272449] [2022-03-19 04:50:54,053 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:50:54,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933146316] [2022-03-19 04:50:54,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933146316] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:50:54,054 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:50:54,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2022-03-19 04:50:54,054 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:50:54,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [321196290] [2022-03-19 04:50:54,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [321196290] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:50:54,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:50:54,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-19 04:50:54,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827111979] [2022-03-19 04:50:54,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:50:54,054 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-19 04:50:54,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:50:54,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-19 04:50:54,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2022-03-19 04:50:54,055 INFO L87 Difference]: Start difference. First operand 987 states and 1315 transitions. Second operand has 23 states, 23 states have (on average 5.565217391304348) internal successors, (128), 22 states have internal predecessors, (128), 22 states have call successors, (24), 22 states have call predecessors, (24), 20 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) [2022-03-19 04:50:54,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:50:54,736 INFO L93 Difference]: Finished difference Result 1191 states and 1617 transitions. [2022-03-19 04:50:54,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-19 04:50:54,738 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.565217391304348) internal successors, (128), 22 states have internal predecessors, (128), 22 states have call successors, (24), 22 states have call predecessors, (24), 20 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) Word has length 177 [2022-03-19 04:50:54,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:50:54,740 INFO L225 Difference]: With dead ends: 1191 [2022-03-19 04:50:54,740 INFO L226 Difference]: Without dead ends: 1013 [2022-03-19 04:50:54,741 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 331 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=573, Invalid=987, Unknown=0, NotChecked=0, Total=1560 [2022-03-19 04:50:54,741 INFO L912 BasicCegarLoop]: 87 mSDtfsCounter, 356 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 04:50:54,741 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 417 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [292 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 04:50:54,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2022-03-19 04:50:55,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 1002. [2022-03-19 04:50:55,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1002 states, 750 states have (on average 1.172) internal successors, (879), 762 states have internal predecessors, (879), 228 states have call successors, (228), 25 states have call predecessors, (228), 23 states have return successors, (226), 214 states have call predecessors, (226), 226 states have call successors, (226) [2022-03-19 04:50:55,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 1333 transitions. [2022-03-19 04:50:55,008 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 1333 transitions. Word has length 177 [2022-03-19 04:50:55,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:50:55,009 INFO L478 AbstractCegarLoop]: Abstraction has 1002 states and 1333 transitions. [2022-03-19 04:50:55,009 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.565217391304348) internal successors, (128), 22 states have internal predecessors, (128), 22 states have call successors, (24), 22 states have call predecessors, (24), 20 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) [2022-03-19 04:50:55,009 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 1333 transitions. [2022-03-19 04:50:55,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-03-19 04:50:55,011 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:50:55,011 INFO L500 BasicCegarLoop]: trace histogram [20, 19, 19, 10, 9, 9, 9, 7, 6, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:50:55,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-03-19 04:50:55,215 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:50:55,216 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:50:55,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:50:55,216 INFO L85 PathProgramCache]: Analyzing trace with hash 2007520492, now seen corresponding path program 29 times [2022-03-19 04:50:55,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:50:55,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1819597004] [2022-03-19 04:50:55,217 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:50:55,217 INFO L85 PathProgramCache]: Analyzing trace with hash 2007520492, now seen corresponding path program 30 times [2022-03-19 04:50:55,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:50:55,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264335459] [2022-03-19 04:50:55,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:50:55,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:50:55,227 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:50:55,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1794973719] [2022-03-19 04:50:55,227 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:50:55,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:50:55,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:50:55,229 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:50:55,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-19 04:50:56,325 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-03-19 04:50:56,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:50:56,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-19 04:50:56,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:50:56,771 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 58 proven. 930 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:50:56,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:50:57,039 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 58 proven. 246 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2022-03-19 04:50:57,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:50:57,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264335459] [2022-03-19 04:50:57,039 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:50:57,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794973719] [2022-03-19 04:50:57,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794973719] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:50:57,040 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:50:57,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2022-03-19 04:50:57,040 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:50:57,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1819597004] [2022-03-19 04:50:57,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1819597004] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:50:57,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:50:57,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-19 04:50:57,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401855575] [2022-03-19 04:50:57,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:50:57,040 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-19 04:50:57,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:50:57,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-19 04:50:57,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2022-03-19 04:50:57,041 INFO L87 Difference]: Start difference. First operand 1002 states and 1333 transitions. Second operand has 23 states, 23 states have (on average 5.6521739130434785) internal successors, (130), 22 states have internal predecessors, (130), 22 states have call successors, (24), 22 states have call predecessors, (24), 20 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) [2022-03-19 04:50:57,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:50:57,699 INFO L93 Difference]: Finished difference Result 1189 states and 1611 transitions. [2022-03-19 04:50:57,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-19 04:50:57,700 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.6521739130434785) internal successors, (130), 22 states have internal predecessors, (130), 22 states have call successors, (24), 22 states have call predecessors, (24), 20 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) Word has length 179 [2022-03-19 04:50:57,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:50:57,702 INFO L225 Difference]: With dead ends: 1189 [2022-03-19 04:50:57,702 INFO L226 Difference]: Without dead ends: 1019 [2022-03-19 04:50:57,703 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 335 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=611, Invalid=1029, Unknown=0, NotChecked=0, Total=1640 [2022-03-19 04:50:57,703 INFO L912 BasicCegarLoop]: 87 mSDtfsCounter, 361 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 313 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 313 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 04:50:57,704 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [361 Valid, 402 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [313 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 04:50:57,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1019 states. [2022-03-19 04:50:57,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1019 to 1019. [2022-03-19 04:50:57,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1019 states, 767 states have (on average 1.1681877444589308) internal successors, (896), 774 states have internal predecessors, (896), 228 states have call successors, (228), 25 states have call predecessors, (228), 23 states have return successors, (226), 219 states have call predecessors, (226), 226 states have call successors, (226) [2022-03-19 04:50:57,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 1350 transitions. [2022-03-19 04:50:57,947 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 1350 transitions. Word has length 179 [2022-03-19 04:50:57,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:50:57,947 INFO L478 AbstractCegarLoop]: Abstraction has 1019 states and 1350 transitions. [2022-03-19 04:50:57,947 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.6521739130434785) internal successors, (130), 22 states have internal predecessors, (130), 22 states have call successors, (24), 22 states have call predecessors, (24), 20 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) [2022-03-19 04:50:57,947 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 1350 transitions. [2022-03-19 04:50:57,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-03-19 04:50:57,949 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:50:57,949 INFO L500 BasicCegarLoop]: trace histogram [21, 20, 20, 11, 11, 11, 11, 8, 6, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:50:57,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-03-19 04:50:58,155 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2022-03-19 04:50:58,155 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:50:58,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:50:58,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1274488939, now seen corresponding path program 23 times [2022-03-19 04:50:58,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:50:58,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1122465889] [2022-03-19 04:50:58,156 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:50:58,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1274488939, now seen corresponding path program 24 times [2022-03-19 04:50:58,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:50:58,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596474745] [2022-03-19 04:50:58,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:50:58,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:50:58,173 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:50:58,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [876319483] [2022-03-19 04:50:58,174 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:50:58,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:50:58,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:50:58,188 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:50:58,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-19 04:50:59,457 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-03-19 04:50:59,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-03-19 04:50:59,457 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 04:50:59,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 04:50:59,703 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 04:50:59,703 INFO L130 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found a feasible trace [2022-03-19 04:50:59,703 INFO L614 BasicCegarLoop]: Counterexample is feasible [2022-03-19 04:50:59,710 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-19 04:50:59,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-03-19 04:50:59,917 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:50:59,920 INFO L718 BasicCegarLoop]: Path program histogram: [34, 30, 24, 8, 8, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2] [2022-03-19 04:50:59,922 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-19 04:50:59,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.03 04:50:59 BoogieIcfgContainer [2022-03-19 04:50:59,943 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-19 04:50:59,944 INFO L158 Benchmark]: Toolchain (without parser) took 86306.14ms. Allocated memory was 255.9MB in the beginning and 639.6MB in the end (delta: 383.8MB). Free memory was 230.1MB in the beginning and 256.0MB in the end (delta: -25.9MB). Peak memory consumption was 358.2MB. Max. memory is 8.0GB. [2022-03-19 04:50:59,944 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 255.9MB. Free memory is still 217.5MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-19 04:50:59,944 INFO L158 Benchmark]: CACSL2BoogieTranslator took 208.30ms. Allocated memory is still 255.9MB. Free memory was 230.0MB in the beginning and 229.7MB in the end (delta: 236.6kB). Peak memory consumption was 7.3MB. Max. memory is 8.0GB. [2022-03-19 04:50:59,944 INFO L158 Benchmark]: Boogie Preprocessor took 27.52ms. Allocated memory is still 255.9MB. Free memory was 229.7MB in the beginning and 228.2MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-19 04:50:59,944 INFO L158 Benchmark]: RCFGBuilder took 282.25ms. Allocated memory is still 255.9MB. Free memory was 228.2MB in the beginning and 217.2MB in the end (delta: 11.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-19 04:50:59,944 INFO L158 Benchmark]: TraceAbstraction took 85783.78ms. Allocated memory was 255.9MB in the beginning and 639.6MB in the end (delta: 383.8MB). Free memory was 216.7MB in the beginning and 256.0MB in the end (delta: -39.3MB). Peak memory consumption was 345.7MB. Max. memory is 8.0GB. [2022-03-19 04:50:59,944 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 255.9MB. Free memory is still 217.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 208.30ms. Allocated memory is still 255.9MB. Free memory was 230.0MB in the beginning and 229.7MB in the end (delta: 236.6kB). Peak memory consumption was 7.3MB. Max. memory is 8.0GB. * Boogie Preprocessor took 27.52ms. Allocated memory is still 255.9MB. Free memory was 229.7MB in the beginning and 228.2MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 282.25ms. Allocated memory is still 255.9MB. Free memory was 228.2MB in the beginning and 217.2MB in the end (delta: 11.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 85783.78ms. Allocated memory was 255.9MB in the beginning and 639.6MB in the end (delta: 383.8MB). Free memory was 216.7MB in the beginning and 256.0MB in the end (delta: -39.3MB). Peak memory consumption was 345.7MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 14]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int counter = 0; [L21] int A, R; [L22] long long u, v, r; [L23] A = __VERIFIER_nondet_int() [L24] R = __VERIFIER_nondet_int() [L25] CALL assume_abort_if_not((((long long) R - 1) * ((long long) R - 1)) < A) [L9] COND FALSE !(!cond) [L25] RET assume_abort_if_not((((long long) R - 1) * ((long long) R - 1)) < A) [L27] CALL assume_abort_if_not(A % 2 == 1) [L9] COND FALSE !(!cond) [L27] RET assume_abort_if_not(A % 2 == 1) [L29] u = ((long long) 2 * R) + 1 [L30] v = 1 [L31] r = ((long long) R * R) - A [L34] EXPR counter++ [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L36] COND FALSE !(!(r != 0)) [L39] EXPR counter++ [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L41] COND TRUE !(r > 0) [L47] EXPR counter++ [L47] COND TRUE counter++<20 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L49] COND FALSE !(!(r < 0)) [L51] r = r + u [L52] u = u + 2 [L47] EXPR counter++ [L47] COND TRUE counter++<20 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L49] COND TRUE !(r < 0) [L34] EXPR counter++ [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L36] COND FALSE !(!(r != 0)) [L39] EXPR counter++ [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 [L39] EXPR counter++ [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 [L39] EXPR counter++ [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L41] COND TRUE !(r > 0) [L47] EXPR counter++ [L47] COND TRUE counter++<20 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L49] COND FALSE !(!(r < 0)) [L51] r = r + u [L52] u = u + 2 [L47] EXPR counter++ [L47] COND TRUE counter++<20 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L49] COND TRUE !(r < 0) [L34] EXPR counter++ [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L36] COND FALSE !(!(r != 0)) [L39] EXPR counter++ [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 [L39] EXPR counter++ [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 [L39] EXPR counter++ [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 [L39] EXPR counter++ [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 [L39] EXPR counter++ [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 [L39] EXPR counter++ [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 [L39] EXPR counter++ [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L41] COND TRUE !(r > 0) [L47] EXPR counter++ [L47] COND TRUE counter++<20 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L49] COND FALSE !(!(r < 0)) [L51] r = r + u [L52] u = u + 2 [L47] EXPR counter++ [L47] COND TRUE counter++<20 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L49] COND TRUE !(r < 0) [L34] EXPR counter++ [L34] COND FALSE !(counter++<20) [L56] CALL __VERIFIER_assert(((long long) 4*A) == u*u - v*v - 2*u + 2*v) [L12] COND TRUE !(cond) [L14] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 85.7s, OverallIterations: 64, TraceHistogramMax: 21, PathProgramHistogramMax: 34, EmptinessCheckTime: 0.1s, AutomataDifference: 26.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 3 mSolverCounterUnknown, 8961 SdHoareTripleChecker+Valid, 16.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 8938 mSDsluCounter, 16058 SdHoareTripleChecker+Invalid, 14.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 171 IncrementalHoareTripleChecker+Unchecked, 12173 mSDsCounter, 7610 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 8312 IncrementalHoareTripleChecker+Invalid, 16096 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 7610 mSolverCounterUnsat, 3885 mSDtfsCounter, 8312 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 12935 GetRequests, 11415 SyntacticMatches, 33 SemanticMatches, 1487 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 3975 ImplicationChecksByTransitivity, 11.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1019occurred in iteration=63, InterpolantAutomatonStates: 1260, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 6.1s AutomataMinimizationTime, 63 MinimizatonAttempts, 871 StatesRemovedByMinimization, 42 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-03-19 04:50:59,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...