/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 22:18:19,124 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 22:18:19,126 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 22:18:19,162 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 22:18:19,199 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 22:18:19,199 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 22:18:19,201 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 22:18:19,201 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-04-06 22:18:19,208 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 22:18:19,208 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 22:18:19,209 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 22:18:19,209 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 22:18:19,209 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 22:18:19,209 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 22:18:19,209 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 22:18:19,209 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 22:18:19,209 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 22:18:19,209 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 22:18:19,210 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 22:18:19,210 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 22:18:19,210 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 22:18:19,210 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 22:18:19,210 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 22:18:19,210 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 22:18:19,210 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 22:18:19,210 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 22:18:19,210 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 22:18:19,211 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 22:18:19,211 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 22:18:19,211 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-06 22:18:19,211 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 22:18:19,406 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 22:18:19,424 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 22:18:19,425 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 22:18:19,426 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 22:18:19,427 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 22:18:19,428 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound100.c [2022-04-06 22:18:19,471 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03ae830c8/8d078b610fbc435d8f7356cff93c610d/FLAGb244abfb8 [2022-04-06 22:18:19,778 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 22:18:19,778 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound100.c [2022-04-06 22:18:19,784 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03ae830c8/8d078b610fbc435d8f7356cff93c610d/FLAGb244abfb8 [2022-04-06 22:18:20,211 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03ae830c8/8d078b610fbc435d8f7356cff93c610d [2022-04-06 22:18:20,212 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 22:18:20,213 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 22:18:20,214 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 22:18:20,214 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 22:18:20,216 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 22:18:20,216 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 10:18:20" (1/1) ... [2022-04-06 22:18:20,217 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@499b658d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:18:20, skipping insertion in model container [2022-04-06 22:18:20,217 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 10:18:20" (1/1) ... [2022-04-06 22:18:20,221 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 22:18:20,229 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 22:18:20,347 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/egcd-ll_unwindbound100.c[489,502] [2022-04-06 22:18:20,371 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 22:18:20,378 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 22:18:20,386 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/egcd-ll_unwindbound100.c[489,502] [2022-04-06 22:18:20,406 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 22:18:20,414 INFO L208 MainTranslator]: Completed translation [2022-04-06 22:18:20,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:18:20 WrapperNode [2022-04-06 22:18:20,415 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 22:18:20,415 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 22:18:20,415 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 22:18:20,415 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 22:18:20,423 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:18:20" (1/1) ... [2022-04-06 22:18:20,423 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:18:20" (1/1) ... [2022-04-06 22:18:20,428 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:18:20" (1/1) ... [2022-04-06 22:18:20,428 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:18:20" (1/1) ... [2022-04-06 22:18:20,436 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:18:20" (1/1) ... [2022-04-06 22:18:20,439 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:18:20" (1/1) ... [2022-04-06 22:18:20,443 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:18:20" (1/1) ... [2022-04-06 22:18:20,445 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 22:18:20,446 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 22:18:20,446 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 22:18:20,446 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 22:18:20,447 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:18:20" (1/1) ... [2022-04-06 22:18:20,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 22:18:20,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:18:20,467 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-06 22:18:20,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-06 22:18:20,501 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 22:18:20,501 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 22:18:20,501 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 22:18:20,501 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 22:18:20,501 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 22:18:20,501 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 22:18:20,501 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 22:18:20,501 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 22:18:20,501 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 22:18:20,502 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 22:18:20,502 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 22:18:20,502 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 22:18:20,502 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 22:18:20,503 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 22:18:20,503 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 22:18:20,503 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 22:18:20,504 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 22:18:20,504 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 22:18:20,504 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 22:18:20,504 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 22:18:20,552 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 22:18:20,553 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 22:18:20,697 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 22:18:20,701 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 22:18:20,702 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-06 22:18:20,703 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 10:18:20 BoogieIcfgContainer [2022-04-06 22:18:20,703 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 22:18:20,704 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 22:18:20,704 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 22:18:20,706 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 22:18:20,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 10:18:20" (1/3) ... [2022-04-06 22:18:20,707 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1599ebd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 10:18:20, skipping insertion in model container [2022-04-06 22:18:20,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:18:20" (2/3) ... [2022-04-06 22:18:20,707 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1599ebd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 10:18:20, skipping insertion in model container [2022-04-06 22:18:20,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 10:18:20" (3/3) ... [2022-04-06 22:18:20,708 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_unwindbound100.c [2022-04-06 22:18:20,711 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 22:18:20,711 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 22:18:20,762 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 22:18:20,766 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 22:18:20,767 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 22:18:20,781 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 22:18:20,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-06 22:18:20,790 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:18:20,790 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:18:20,791 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:18:20,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:18:20,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1226702723, now seen corresponding path program 1 times [2022-04-06 22:18:20,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:20,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2146669565] [2022-04-06 22:18:20,814 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:18:20,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1226702723, now seen corresponding path program 2 times [2022-04-06 22:18:20,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:18:20,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256571484] [2022-04-06 22:18:20,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:18:20,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:18:20,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 22:18:20,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 22:18:20,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 22:18:20,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 22:18:20,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 22:18:20,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 22:18:20,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 22:18:20,975 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 22:18:20,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:18:20,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256571484] [2022-04-06 22:18:20,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256571484] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:18:20,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:18:20,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 22:18:20,978 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:18:20,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2146669565] [2022-04-06 22:18:20,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2146669565] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:18:20,979 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:18:20,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 22:18:20,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464577335] [2022-04-06 22:18:20,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:18:20,983 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 22:18:20,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:21,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 22:18:21,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 22:18:21,005 INFO L87 Difference]: Start difference. First operand has 35 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 22:18:21,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:18:21,085 INFO L93 Difference]: Finished difference Result 64 states and 97 transitions. [2022-04-06 22:18:21,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 22:18:21,087 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-04-06 22:18:21,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:18:21,093 INFO L225 Difference]: With dead ends: 64 [2022-04-06 22:18:21,093 INFO L226 Difference]: Without dead ends: 31 [2022-04-06 22:18:21,096 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 22:18:21,098 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 22:18:21,099 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 45 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 22:18:21,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-04-06 22:18:21,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2022-04-06 22:18:21,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-06 22:18:21,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2022-04-06 22:18:21,126 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 22 [2022-04-06 22:18:21,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:18:21,127 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2022-04-06 22:18:21,127 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 22:18:21,127 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2022-04-06 22:18:21,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 22:18:21,128 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:18:21,128 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:18:21,129 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 22:18:21,129 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:18:21,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:18:21,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1346542817, now seen corresponding path program 1 times [2022-04-06 22:18:21,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:21,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [420427680] [2022-04-06 22:18:21,131 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:18:21,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1346542817, now seen corresponding path program 2 times [2022-04-06 22:18:21,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:18:21,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494404310] [2022-04-06 22:18:21,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:18:21,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:18:21,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 22:18:21,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 22:18:21,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 22:18:21,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 22:18:21,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 22:18:21,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 22:18:21,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 22:18:21,221 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 22:18:21,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:18:21,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494404310] [2022-04-06 22:18:21,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494404310] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:18:21,222 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:18:21,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 22:18:21,222 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:18:21,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [420427680] [2022-04-06 22:18:21,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [420427680] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:18:21,223 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:18:21,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 22:18:21,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456687233] [2022-04-06 22:18:21,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:18:21,224 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 22:18:21,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:21,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 22:18:21,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 22:18:21,225 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 22:18:21,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:18:21,329 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2022-04-06 22:18:21,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 22:18:21,330 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), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-04-06 22:18:21,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:18:21,331 INFO L225 Difference]: With dead ends: 42 [2022-04-06 22:18:21,331 INFO L226 Difference]: Without dead ends: 32 [2022-04-06 22:18:21,332 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 22:18:21,333 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 13 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 22:18:21,333 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 65 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 22:18:21,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-04-06 22:18:21,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-04-06 22:18:21,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-06 22:18:21,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-04-06 22:18:21,358 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 23 [2022-04-06 22:18:21,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:18:21,359 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-04-06 22:18:21,359 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), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 22:18:21,360 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-04-06 22:18:21,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 22:18:21,360 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:18:21,360 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:18:21,360 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 22:18:21,361 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:18:21,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:18:21,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1348211113, now seen corresponding path program 1 times [2022-04-06 22:18:21,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:21,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1004113258] [2022-04-06 22:18:21,366 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:18:21,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1348211113, now seen corresponding path program 2 times [2022-04-06 22:18:21,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:18:21,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058280813] [2022-04-06 22:18:21,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:18:21,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:18:21,385 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:18:21,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [178915430] [2022-04-06 22:18:21,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:18:21,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:18:21,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:18:21,399 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:18:21,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 22:18:21,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-06 22:18:21,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:18:21,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 22:18:21,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:18:21,540 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 22:18:21,541 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 22:18:21,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:18:21,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058280813] [2022-04-06 22:18:21,541 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:18:21,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178915430] [2022-04-06 22:18:21,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178915430] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:18:21,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:18:21,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 22:18:21,542 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:18:21,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1004113258] [2022-04-06 22:18:21,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1004113258] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:18:21,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:18:21,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 22:18:21,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453545920] [2022-04-06 22:18:21,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:18:21,543 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 22:18:21,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:21,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 22:18:21,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 22:18:21,544 INFO L87 Difference]: Start difference. First operand 32 states and 41 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) [2022-04-06 22:18:21,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:18:21,592 INFO L93 Difference]: Finished difference Result 49 states and 66 transitions. [2022-04-06 22:18:21,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 22:18:21,592 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 [2022-04-06 22:18:21,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:18:21,595 INFO L225 Difference]: With dead ends: 49 [2022-04-06 22:18:21,595 INFO L226 Difference]: Without dead ends: 47 [2022-04-06 22:18:21,596 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 22:18:21,599 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 8 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 22:18:21,599 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 134 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 22:18:21,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-04-06 22:18:21,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2022-04-06 22:18:21,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 26 states have internal predecessors, (31), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-04-06 22:18:21,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2022-04-06 22:18:21,607 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 23 [2022-04-06 22:18:21,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:18:21,608 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2022-04-06 22:18:21,608 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) [2022-04-06 22:18:21,608 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2022-04-06 22:18:21,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 22:18:21,609 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:18:21,609 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:18:21,632 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-04-06 22:18:21,823 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:18:21,824 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:18:21,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:18:21,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1060153012, now seen corresponding path program 1 times [2022-04-06 22:18:21,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:21,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [699239358] [2022-04-06 22:18:21,825 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:18:21,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1060153012, now seen corresponding path program 2 times [2022-04-06 22:18:21,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:18:21,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595389240] [2022-04-06 22:18:21,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:18:21,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:18:21,841 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:18:21,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [160589165] [2022-04-06 22:18:21,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:18:21,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:18:21,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:18:21,843 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:18:21,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 22:18:21,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:18:21,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:18:21,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 22:18:21,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:18:21,950 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 22:18:21,951 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 22:18:21,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:18:21,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595389240] [2022-04-06 22:18:21,951 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:18:21,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160589165] [2022-04-06 22:18:21,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160589165] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:18:21,951 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:18:21,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 22:18:21,952 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:18:21,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [699239358] [2022-04-06 22:18:21,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [699239358] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:18:21,952 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:18:21,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 22:18:21,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538962233] [2022-04-06 22:18:21,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:18:21,953 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 22:18:21,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:21,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 22:18:21,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 22:18:21,953 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 22:18:21,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:18:21,993 INFO L93 Difference]: Finished difference Result 53 states and 69 transitions. [2022-04-06 22:18:21,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 22:18:21,993 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-04-06 22:18:21,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:18:21,994 INFO L225 Difference]: With dead ends: 53 [2022-04-06 22:18:21,994 INFO L226 Difference]: Without dead ends: 51 [2022-04-06 22:18:21,995 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 22:18:21,995 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 9 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 22:18:21,995 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 138 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 22:18:21,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-04-06 22:18:22,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-04-06 22:18:22,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 29 states have internal predecessors, (34), 17 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-04-06 22:18:22,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 66 transitions. [2022-04-06 22:18:22,002 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 66 transitions. Word has length 28 [2022-04-06 22:18:22,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:18:22,002 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 66 transitions. [2022-04-06 22:18:22,002 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 22:18:22,002 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 66 transitions. [2022-04-06 22:18:22,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 22:18:22,003 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:18:22,003 INFO L499 BasicCegarLoop]: trace histogram [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] [2022-04-06 22:18:22,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 22:18:22,219 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,SelfDestructingSolverStorable3 [2022-04-06 22:18:22,219 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:18:22,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:18:22,220 INFO L85 PathProgramCache]: Analyzing trace with hash -560761015, now seen corresponding path program 1 times [2022-04-06 22:18:22,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:22,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [881103046] [2022-04-06 22:18:22,221 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:18:22,221 INFO L85 PathProgramCache]: Analyzing trace with hash -560761015, now seen corresponding path program 2 times [2022-04-06 22:18:22,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:18:22,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373096872] [2022-04-06 22:18:22,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:18:22,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:18:22,236 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:18:22,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [774810176] [2022-04-06 22:18:22,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:18:22,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:18:22,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:18:22,238 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) [2022-04-06 22:18:22,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 22:18:22,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:18:22,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:18:22,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 22:18:22,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:18:22,382 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-04-06 22:18:22,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:18:22,503 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-06 22:18:22,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:18:22,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373096872] [2022-04-06 22:18:22,503 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:18:22,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774810176] [2022-04-06 22:18:22,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774810176] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 22:18:22,504 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 22:18:22,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2022-04-06 22:18:22,504 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:18:22,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [881103046] [2022-04-06 22:18:22,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [881103046] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:18:22,504 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:18:22,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 22:18:22,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635954867] [2022-04-06 22:18:22,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:18:22,505 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 22:18:22,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:22,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 22:18:22,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-04-06 22:18:22,505 INFO L87 Difference]: Start difference. First operand 50 states and 66 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 22:18:22,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:18:22,561 INFO L93 Difference]: Finished difference Result 75 states and 107 transitions. [2022-04-06 22:18:22,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 22:18:22,561 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-04-06 22:18:22,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:18:22,563 INFO L225 Difference]: With dead ends: 75 [2022-04-06 22:18:22,563 INFO L226 Difference]: Without dead ends: 71 [2022-04-06 22:18:22,564 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-04-06 22:18:22,564 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 9 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 22:18:22,564 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 128 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 22:18:22,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-04-06 22:18:22,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-04-06 22:18:22,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 36 states have (on average 1.3333333333333333) internal successors, (48), 40 states have internal predecessors, (48), 28 states have call successors, (28), 7 states have call predecessors, (28), 6 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-04-06 22:18:22,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 100 transitions. [2022-04-06 22:18:22,577 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 100 transitions. Word has length 33 [2022-04-06 22:18:22,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:18:22,577 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 100 transitions. [2022-04-06 22:18:22,577 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 22:18:22,577 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 100 transitions. [2022-04-06 22:18:22,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 22:18:22,578 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:18:22,578 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:18:22,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 22:18:22,791 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:18:22,792 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:18:22,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:18:22,792 INFO L85 PathProgramCache]: Analyzing trace with hash 201438379, now seen corresponding path program 1 times [2022-04-06 22:18:22,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:22,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [106808825] [2022-04-06 22:18:22,793 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:18:22,793 INFO L85 PathProgramCache]: Analyzing trace with hash 201438379, now seen corresponding path program 2 times [2022-04-06 22:18:22,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:18:22,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578276306] [2022-04-06 22:18:22,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:18:22,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:18:22,804 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:18:22,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [68016870] [2022-04-06 22:18:22,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:18:22,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:18:22,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:18:22,811 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) [2022-04-06 22:18:22,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 22:18:22,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:18:22,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:18:22,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 22:18:22,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:18:22,920 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 22:18:22,920 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 22:18:22,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:18:22,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578276306] [2022-04-06 22:18:22,920 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:18:22,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68016870] [2022-04-06 22:18:22,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68016870] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:18:22,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:18:22,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 22:18:22,921 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:18:22,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [106808825] [2022-04-06 22:18:22,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [106808825] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:18:22,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:18:22,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 22:18:22,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678993468] [2022-04-06 22:18:22,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:18:22,926 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 22:18:22,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:22,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 22:18:22,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 22:18:22,927 INFO L87 Difference]: Start difference. First operand 71 states and 100 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-04-06 22:18:22,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:18:22,966 INFO L93 Difference]: Finished difference Result 87 states and 123 transitions. [2022-04-06 22:18:22,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 22:18:22,966 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 39 [2022-04-06 22:18:22,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:18:22,980 INFO L225 Difference]: With dead ends: 87 [2022-04-06 22:18:22,980 INFO L226 Difference]: Without dead ends: 85 [2022-04-06 22:18:22,980 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 22:18:22,981 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 5 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 22:18:22,981 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 144 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 22:18:22,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-04-06 22:18:22,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 78. [2022-04-06 22:18:22,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 46 states have internal predecessors, (51), 31 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (27), 23 states have call predecessors, (27), 27 states have call successors, (27) [2022-04-06 22:18:22,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 109 transitions. [2022-04-06 22:18:22,991 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 109 transitions. Word has length 39 [2022-04-06 22:18:22,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:18:22,991 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 109 transitions. [2022-04-06 22:18:22,991 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-04-06 22:18:22,991 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 109 transitions. [2022-04-06 22:18:22,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 22:18:22,992 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:18:22,992 INFO L499 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] [2022-04-06 22:18:23,010 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 22:18:23,192 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:18:23,192 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:18:23,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:18:23,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1085077998, now seen corresponding path program 1 times [2022-04-06 22:18:23,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:23,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [652520294] [2022-04-06 22:18:23,194 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:18:23,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1085077998, now seen corresponding path program 2 times [2022-04-06 22:18:23,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:18:23,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485096891] [2022-04-06 22:18:23,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:18:23,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:18:23,210 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:18:23,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1664684434] [2022-04-06 22:18:23,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:18:23,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:18:23,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:18:23,212 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) [2022-04-06 22:18:23,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 22:18:23,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:18:23,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:18:23,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 22:18:23,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:18:23,332 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 22:18:23,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:18:23,413 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 22:18:23,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:18:23,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485096891] [2022-04-06 22:18:23,413 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:18:23,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664684434] [2022-04-06 22:18:23,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664684434] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:18:23,414 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:18:23,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-04-06 22:18:23,414 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:18:23,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [652520294] [2022-04-06 22:18:23,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [652520294] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:18:23,414 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:18:23,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 22:18:23,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730526489] [2022-04-06 22:18:23,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:18:23,415 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 22:18:23,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:23,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 22:18:23,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-04-06 22:18:23,416 INFO L87 Difference]: Start difference. First operand 78 states and 109 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-04-06 22:18:23,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:18:23,454 INFO L93 Difference]: Finished difference Result 121 states and 152 transitions. [2022-04-06 22:18:23,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 22:18:23,454 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2022-04-06 22:18:23,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:18:23,456 INFO L225 Difference]: With dead ends: 121 [2022-04-06 22:18:23,456 INFO L226 Difference]: Without dead ends: 102 [2022-04-06 22:18:23,457 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-04-06 22:18:23,458 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 13 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 22:18:23,458 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 130 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 22:18:23,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-04-06 22:18:23,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2022-04-06 22:18:23,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 57 states have (on average 1.2105263157894737) internal successors, (69), 63 states have internal predecessors, (69), 31 states have call successors, (31), 13 states have call predecessors, (31), 11 states have return successors, (27), 23 states have call predecessors, (27), 27 states have call successors, (27) [2022-04-06 22:18:23,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 127 transitions. [2022-04-06 22:18:23,482 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 127 transitions. Word has length 42 [2022-04-06 22:18:23,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:18:23,482 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 127 transitions. [2022-04-06 22:18:23,482 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-04-06 22:18:23,482 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 127 transitions. [2022-04-06 22:18:23,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 22:18:23,484 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:18:23,484 INFO L499 BasicCegarLoop]: trace histogram [4, 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, 1, 1, 1] [2022-04-06 22:18:23,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 22:18:23,700 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:18:23,701 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:18:23,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:18:23,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1083409702, now seen corresponding path program 1 times [2022-04-06 22:18:23,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:23,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1523636070] [2022-04-06 22:18:23,702 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:18:23,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1083409702, now seen corresponding path program 2 times [2022-04-06 22:18:23,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:18:23,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353907807] [2022-04-06 22:18:23,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:18:23,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:18:23,713 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:18:23,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [568496063] [2022-04-06 22:18:23,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:18:23,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:18:23,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:18:23,718 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) [2022-04-06 22:18:23,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 22:18:23,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:18:23,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:18:23,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 22:18:23,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:18:23,877 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-04-06 22:18:23,877 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 22:18:23,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:18:23,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353907807] [2022-04-06 22:18:23,878 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:18:23,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568496063] [2022-04-06 22:18:23,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568496063] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:18:23,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:18:23,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 22:18:23,879 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:18:23,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1523636070] [2022-04-06 22:18:23,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1523636070] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:18:23,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:18:23,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 22:18:23,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646039008] [2022-04-06 22:18:23,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:18:23,880 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 22:18:23,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:23,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 22:18:23,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 22:18:23,880 INFO L87 Difference]: Start difference. First operand 100 states and 127 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-06 22:18:23,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:18:23,916 INFO L93 Difference]: Finished difference Result 106 states and 132 transitions. [2022-04-06 22:18:23,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 22:18:23,917 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 42 [2022-04-06 22:18:23,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:18:23,919 INFO L225 Difference]: With dead ends: 106 [2022-04-06 22:18:23,919 INFO L226 Difference]: Without dead ends: 103 [2022-04-06 22:18:23,919 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 22:18:23,920 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 7 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 22:18:23,920 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 132 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 22:18:23,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-04-06 22:18:23,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-04-06 22:18:23,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 60 states have (on average 1.2) internal successors, (72), 66 states have internal predecessors, (72), 30 states have call successors, (30), 14 states have call predecessors, (30), 12 states have return successors, (26), 22 states have call predecessors, (26), 26 states have call successors, (26) [2022-04-06 22:18:23,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 128 transitions. [2022-04-06 22:18:23,932 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 128 transitions. Word has length 42 [2022-04-06 22:18:23,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:18:23,932 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 128 transitions. [2022-04-06 22:18:23,932 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-06 22:18:23,932 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 128 transitions. [2022-04-06 22:18:23,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-06 22:18:23,933 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:18:23,933 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 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] [2022-04-06 22:18:23,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 22:18:24,141 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:18:24,141 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:18:24,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:18:24,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1376219446, now seen corresponding path program 1 times [2022-04-06 22:18:24,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:24,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [743554094] [2022-04-06 22:18:24,142 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:18:24,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1376219446, now seen corresponding path program 2 times [2022-04-06 22:18:24,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:18:24,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92592165] [2022-04-06 22:18:24,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:18:24,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:18:24,149 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:18:24,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [108048997] [2022-04-06 22:18:24,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:18:24,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:18:24,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:18:24,167 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) [2022-04-06 22:18:24,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 22:18:24,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:18:24,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:18:24,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 22:18:24,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:18:24,344 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-04-06 22:18:24,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:18:24,464 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-04-06 22:18:24,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:18:24,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92592165] [2022-04-06 22:18:24,465 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:18:24,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108048997] [2022-04-06 22:18:24,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108048997] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:18:24,465 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:18:24,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-04-06 22:18:24,465 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:18:24,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [743554094] [2022-04-06 22:18:24,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [743554094] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:18:24,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:18:24,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 22:18:24,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320483726] [2022-04-06 22:18:24,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:18:24,466 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 22:18:24,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:24,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 22:18:24,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-04-06 22:18:24,466 INFO L87 Difference]: Start difference. First operand 103 states and 128 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-04-06 22:18:24,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:18:24,566 INFO L93 Difference]: Finished difference Result 118 states and 148 transitions. [2022-04-06 22:18:24,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 22:18:24,567 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 44 [2022-04-06 22:18:24,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:18:24,568 INFO L225 Difference]: With dead ends: 118 [2022-04-06 22:18:24,568 INFO L226 Difference]: Without dead ends: 106 [2022-04-06 22:18:24,568 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-04-06 22:18:24,568 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 16 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 22:18:24,569 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 122 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 22:18:24,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-04-06 22:18:24,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2022-04-06 22:18:24,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 67 states have internal predecessors, (71), 31 states have call successors, (31), 13 states have call predecessors, (31), 12 states have return successors, (28), 23 states have call predecessors, (28), 28 states have call successors, (28) [2022-04-06 22:18:24,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 130 transitions. [2022-04-06 22:18:24,576 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 130 transitions. Word has length 44 [2022-04-06 22:18:24,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:18:24,577 INFO L478 AbstractCegarLoop]: Abstraction has 104 states and 130 transitions. [2022-04-06 22:18:24,577 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-04-06 22:18:24,577 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 130 transitions. [2022-04-06 22:18:24,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 22:18:24,577 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:18:24,578 INFO L499 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] [2022-04-06 22:18:24,596 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-04-06 22:18:24,788 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:18:24,789 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:18:24,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:18:24,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1137310021, now seen corresponding path program 3 times [2022-04-06 22:18:24,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:24,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [51875958] [2022-04-06 22:18:24,790 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:18:24,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1137310021, now seen corresponding path program 4 times [2022-04-06 22:18:24,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:18:24,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595558860] [2022-04-06 22:18:24,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:18:24,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:18:24,795 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:18:24,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [278021178] [2022-04-06 22:18:24,796 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 22:18:24,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:18:24,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:18:24,797 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) [2022-04-06 22:18:24,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 22:18:24,834 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 22:18:24,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:18:24,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-06 22:18:24,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:18:25,001 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 22:18:25,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:18:25,098 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 22:18:25,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:18:25,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595558860] [2022-04-06 22:18:25,098 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:18:25,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278021178] [2022-04-06 22:18:25,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278021178] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:18:25,098 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:18:25,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-04-06 22:18:25,100 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:18:25,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [51875958] [2022-04-06 22:18:25,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [51875958] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:18:25,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:18:25,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 22:18:25,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763144749] [2022-04-06 22:18:25,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:18:25,102 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 22:18:25,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:25,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 22:18:25,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-04-06 22:18:25,102 INFO L87 Difference]: Start difference. First operand 104 states and 130 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-04-06 22:18:25,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:18:25,213 INFO L93 Difference]: Finished difference Result 131 states and 169 transitions. [2022-04-06 22:18:25,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 22:18:25,215 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 47 [2022-04-06 22:18:25,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:18:25,216 INFO L225 Difference]: With dead ends: 131 [2022-04-06 22:18:25,216 INFO L226 Difference]: Without dead ends: 129 [2022-04-06 22:18:25,216 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-04-06 22:18:25,217 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 9 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 22:18:25,217 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 168 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 22:18:25,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-04-06 22:18:25,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 124. [2022-04-06 22:18:25,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 72 states have (on average 1.2083333333333333) internal successors, (87), 79 states have internal predecessors, (87), 37 states have call successors, (37), 15 states have call predecessors, (37), 14 states have return successors, (34), 29 states have call predecessors, (34), 34 states have call successors, (34) [2022-04-06 22:18:25,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 158 transitions. [2022-04-06 22:18:25,226 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 158 transitions. Word has length 47 [2022-04-06 22:18:25,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:18:25,226 INFO L478 AbstractCegarLoop]: Abstraction has 124 states and 158 transitions. [2022-04-06 22:18:25,227 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-04-06 22:18:25,227 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 158 transitions. [2022-04-06 22:18:25,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-06 22:18:25,227 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:18:25,227 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 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] [2022-04-06 22:18:25,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 22:18:25,443 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,SelfDestructingSolverStorable9 [2022-04-06 22:18:25,444 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:18:25,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:18:25,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1475439812, now seen corresponding path program 1 times [2022-04-06 22:18:25,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:25,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1193551118] [2022-04-06 22:18:25,445 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:18:25,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1475439812, now seen corresponding path program 2 times [2022-04-06 22:18:25,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:18:25,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627684892] [2022-04-06 22:18:25,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:18:25,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:18:25,451 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:18:25,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [46763622] [2022-04-06 22:18:25,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:18:25,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:18:25,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:18:25,456 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) [2022-04-06 22:18:25,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 22:18:25,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:18:25,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:18:25,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-06 22:18:25,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:18:25,789 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 23 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-04-06 22:18:25,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:18:25,970 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 28 proven. 5 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-04-06 22:18:25,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:18:25,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627684892] [2022-04-06 22:18:25,970 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:18:25,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46763622] [2022-04-06 22:18:25,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46763622] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:18:25,970 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:18:25,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-04-06 22:18:25,971 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:18:25,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1193551118] [2022-04-06 22:18:25,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1193551118] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:18:25,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:18:25,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 22:18:25,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748883326] [2022-04-06 22:18:25,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:18:25,971 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 22:18:25,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:25,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 22:18:25,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-04-06 22:18:25,972 INFO L87 Difference]: Start difference. First operand 124 states and 158 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-04-06 22:18:26,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:18:26,193 INFO L93 Difference]: Finished difference Result 160 states and 210 transitions. [2022-04-06 22:18:26,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 22:18:26,193 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 52 [2022-04-06 22:18:26,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:18:26,194 INFO L225 Difference]: With dead ends: 160 [2022-04-06 22:18:26,195 INFO L226 Difference]: Without dead ends: 153 [2022-04-06 22:18:26,195 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-04-06 22:18:26,195 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 21 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 22:18:26,195 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 168 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 22:18:26,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-04-06 22:18:26,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2022-04-06 22:18:26,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 87 states have (on average 1.2183908045977012) internal successors, (106), 96 states have internal predecessors, (106), 48 states have call successors, (48), 18 states have call predecessors, (48), 17 states have return successors, (44), 38 states have call predecessors, (44), 44 states have call successors, (44) [2022-04-06 22:18:26,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 198 transitions. [2022-04-06 22:18:26,208 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 198 transitions. Word has length 52 [2022-04-06 22:18:26,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:18:26,208 INFO L478 AbstractCegarLoop]: Abstraction has 153 states and 198 transitions. [2022-04-06 22:18:26,208 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-04-06 22:18:26,208 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 198 transitions. [2022-04-06 22:18:26,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-06 22:18:26,209 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:18:26,209 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 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] [2022-04-06 22:18:26,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 22:18:26,409 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:18:26,409 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:18:26,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:18:26,410 INFO L85 PathProgramCache]: Analyzing trace with hash 220857665, now seen corresponding path program 3 times [2022-04-06 22:18:26,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:26,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [713980621] [2022-04-06 22:18:26,410 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:18:26,410 INFO L85 PathProgramCache]: Analyzing trace with hash 220857665, now seen corresponding path program 4 times [2022-04-06 22:18:26,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:18:26,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307691193] [2022-04-06 22:18:26,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:18:26,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:18:26,416 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:18:26,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1333896524] [2022-04-06 22:18:26,416 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 22:18:26,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:18:26,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:18:26,417 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) [2022-04-06 22:18:26,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 22:18:26,455 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 22:18:26,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:18:26,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 22:18:26,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:18:26,544 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 12 proven. 47 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 22:18:26,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:18:26,660 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-06 22:18:26,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:18:26,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307691193] [2022-04-06 22:18:26,661 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:18:26,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333896524] [2022-04-06 22:18:26,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333896524] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:18:26,661 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:18:26,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-04-06 22:18:26,661 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:18:26,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [713980621] [2022-04-06 22:18:26,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [713980621] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:18:26,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:18:26,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 22:18:26,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604177585] [2022-04-06 22:18:26,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:18:26,662 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 22:18:26,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:26,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 22:18:26,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-04-06 22:18:26,662 INFO L87 Difference]: Start difference. First operand 153 states and 198 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2022-04-06 22:18:26,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:18:26,714 INFO L93 Difference]: Finished difference Result 199 states and 251 transitions. [2022-04-06 22:18:26,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 22:18:26,715 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) Word has length 61 [2022-04-06 22:18:26,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:18:26,718 INFO L225 Difference]: With dead ends: 199 [2022-04-06 22:18:26,718 INFO L226 Difference]: Without dead ends: 173 [2022-04-06 22:18:26,720 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2022-04-06 22:18:26,723 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 15 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 22:18:26,723 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 136 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 22:18:26,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-04-06 22:18:26,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2022-04-06 22:18:26,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 104 states have (on average 1.1826923076923077) internal successors, (123), 113 states have internal predecessors, (123), 48 states have call successors, (48), 21 states have call predecessors, (48), 20 states have return successors, (44), 38 states have call predecessors, (44), 44 states have call successors, (44) [2022-04-06 22:18:26,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 215 transitions. [2022-04-06 22:18:26,738 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 215 transitions. Word has length 61 [2022-04-06 22:18:26,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:18:26,739 INFO L478 AbstractCegarLoop]: Abstraction has 173 states and 215 transitions. [2022-04-06 22:18:26,739 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2022-04-06 22:18:26,739 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 215 transitions. [2022-04-06 22:18:26,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-06 22:18:26,740 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:18:26,740 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 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] [2022-04-06 22:18:26,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-06 22:18:26,953 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,SelfDestructingSolverStorable11 [2022-04-06 22:18:26,953 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:18:26,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:18:26,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1997533323, now seen corresponding path program 1 times [2022-04-06 22:18:26,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:26,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1630891894] [2022-04-06 22:18:26,954 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:18:26,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1997533323, now seen corresponding path program 2 times [2022-04-06 22:18:26,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:18:26,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383280957] [2022-04-06 22:18:26,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:18:26,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:18:26,960 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:18:26,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1103081354] [2022-04-06 22:18:26,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:18:26,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:18:26,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:18:26,961 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) [2022-04-06 22:18:26,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 22:18:26,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:18:26,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:18:26,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 22:18:27,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:18:27,208 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-06 22:18:27,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:18:27,337 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-04-06 22:18:27,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:18:27,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383280957] [2022-04-06 22:18:27,337 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:18:27,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103081354] [2022-04-06 22:18:27,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103081354] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 22:18:27,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 22:18:27,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2022-04-06 22:18:27,337 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:18:27,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1630891894] [2022-04-06 22:18:27,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1630891894] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:18:27,338 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:18:27,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 22:18:27,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470068720] [2022-04-06 22:18:27,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:18:27,338 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 22:18:27,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:27,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 22:18:27,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-04-06 22:18:27,339 INFO L87 Difference]: Start difference. First operand 173 states and 215 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-06 22:18:27,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:18:27,381 INFO L93 Difference]: Finished difference Result 179 states and 220 transitions. [2022-04-06 22:18:27,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 22:18:27,381 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 61 [2022-04-06 22:18:27,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:18:27,382 INFO L225 Difference]: With dead ends: 179 [2022-04-06 22:18:27,382 INFO L226 Difference]: Without dead ends: 174 [2022-04-06 22:18:27,382 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 112 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-04-06 22:18:27,383 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 7 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 22:18:27,383 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 102 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 22:18:27,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-04-06 22:18:27,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 172. [2022-04-06 22:18:27,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 107 states have (on average 1.1682242990654206) internal successors, (125), 114 states have internal predecessors, (125), 43 states have call successors, (43), 22 states have call predecessors, (43), 21 states have return successors, (40), 35 states have call predecessors, (40), 40 states have call successors, (40) [2022-04-06 22:18:27,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 208 transitions. [2022-04-06 22:18:27,398 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 208 transitions. Word has length 61 [2022-04-06 22:18:27,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:18:27,398 INFO L478 AbstractCegarLoop]: Abstraction has 172 states and 208 transitions. [2022-04-06 22:18:27,398 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-06 22:18:27,398 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 208 transitions. [2022-04-06 22:18:27,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-04-06 22:18:27,398 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:18:27,398 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:18:27,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-06 22:18:27,607 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,SelfDestructingSolverStorable12 [2022-04-06 22:18:27,607 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:18:27,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:18:27,608 INFO L85 PathProgramCache]: Analyzing trace with hash 404368620, now seen corresponding path program 5 times [2022-04-06 22:18:27,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:27,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1796590319] [2022-04-06 22:18:27,608 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:18:27,608 INFO L85 PathProgramCache]: Analyzing trace with hash 404368620, now seen corresponding path program 6 times [2022-04-06 22:18:27,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:18:27,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924690912] [2022-04-06 22:18:27,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:18:27,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:18:27,614 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:18:27,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1064489738] [2022-04-06 22:18:27,614 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 22:18:27,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:18:27,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:18:27,615 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) [2022-04-06 22:18:27,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-06 22:18:27,672 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 22:18:27,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:18:27,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 36 conjunts are in the unsatisfiable core [2022-04-06 22:18:27,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:18:27,954 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 25 proven. 22 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-04-06 22:18:27,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:18:28,204 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 29 proven. 18 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-04-06 22:18:28,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:18:28,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924690912] [2022-04-06 22:18:28,204 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:18:28,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064489738] [2022-04-06 22:18:28,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064489738] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:18:28,205 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:18:28,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2022-04-06 22:18:28,205 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:18:28,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1796590319] [2022-04-06 22:18:28,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1796590319] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:18:28,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:18:28,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 22:18:28,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519985480] [2022-04-06 22:18:28,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:18:28,206 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 22:18:28,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:28,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 22:18:28,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-04-06 22:18:28,206 INFO L87 Difference]: Start difference. First operand 172 states and 208 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-04-06 22:18:28,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:18:28,443 INFO L93 Difference]: Finished difference Result 199 states and 247 transitions. [2022-04-06 22:18:28,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 22:18:28,443 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 66 [2022-04-06 22:18:28,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:18:28,444 INFO L225 Difference]: With dead ends: 199 [2022-04-06 22:18:28,444 INFO L226 Difference]: Without dead ends: 197 [2022-04-06 22:18:28,445 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-04-06 22:18:28,445 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 16 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 22:18:28,445 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 172 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 22:18:28,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-04-06 22:18:28,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 181. [2022-04-06 22:18:28,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 112 states have (on average 1.1696428571428572) internal successors, (131), 119 states have internal predecessors, (131), 46 states have call successors, (46), 23 states have call predecessors, (46), 22 states have return successors, (43), 38 states have call predecessors, (43), 43 states have call successors, (43) [2022-04-06 22:18:28,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 220 transitions. [2022-04-06 22:18:28,475 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 220 transitions. Word has length 66 [2022-04-06 22:18:28,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:18:28,476 INFO L478 AbstractCegarLoop]: Abstraction has 181 states and 220 transitions. [2022-04-06 22:18:28,476 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-04-06 22:18:28,476 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 220 transitions. [2022-04-06 22:18:28,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-04-06 22:18:28,476 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:18:28,476 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:18:28,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-06 22:18:28,687 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,SelfDestructingSolverStorable13 [2022-04-06 22:18:28,687 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:18:28,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:18:28,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1105968494, now seen corresponding path program 3 times [2022-04-06 22:18:28,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:28,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1240460294] [2022-04-06 22:18:28,688 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:18:28,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1105968494, now seen corresponding path program 4 times [2022-04-06 22:18:28,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:18:28,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692608037] [2022-04-06 22:18:28,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:18:28,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:18:28,694 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:18:28,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [429417624] [2022-04-06 22:18:28,694 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 22:18:28,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:18:28,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:18:28,695 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) [2022-04-06 22:18:28,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-06 22:18:28,730 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 22:18:28,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:18:28,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-06 22:18:28,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:18:29,051 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 30 proven. 29 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-04-06 22:18:29,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:18:29,304 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 43 proven. 16 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-04-06 22:18:29,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:18:29,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692608037] [2022-04-06 22:18:29,304 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:18:29,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429417624] [2022-04-06 22:18:29,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429417624] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:18:29,304 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:18:29,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2022-04-06 22:18:29,305 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:18:29,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1240460294] [2022-04-06 22:18:29,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1240460294] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:18:29,305 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:18:29,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 22:18:29,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785275226] [2022-04-06 22:18:29,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:18:29,306 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 22:18:29,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:29,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 22:18:29,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-04-06 22:18:29,306 INFO L87 Difference]: Start difference. First operand 181 states and 220 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-04-06 22:18:29,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:18:29,524 INFO L93 Difference]: Finished difference Result 208 states and 259 transitions. [2022-04-06 22:18:29,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 22:18:29,524 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 66 [2022-04-06 22:18:29,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:18:29,525 INFO L225 Difference]: With dead ends: 208 [2022-04-06 22:18:29,525 INFO L226 Difference]: Without dead ends: 206 [2022-04-06 22:18:29,526 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 117 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-04-06 22:18:29,526 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 15 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 22:18:29,526 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 198 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 22:18:29,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-04-06 22:18:29,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 190. [2022-04-06 22:18:29,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 117 states have (on average 1.170940170940171) internal successors, (137), 124 states have internal predecessors, (137), 49 states have call successors, (49), 24 states have call predecessors, (49), 23 states have return successors, (46), 41 states have call predecessors, (46), 46 states have call successors, (46) [2022-04-06 22:18:29,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 232 transitions. [2022-04-06 22:18:29,540 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 232 transitions. Word has length 66 [2022-04-06 22:18:29,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:18:29,540 INFO L478 AbstractCegarLoop]: Abstraction has 190 states and 232 transitions. [2022-04-06 22:18:29,540 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-04-06 22:18:29,540 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 232 transitions. [2022-04-06 22:18:29,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-04-06 22:18:29,543 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:18:29,543 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 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] [2022-04-06 22:18:29,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-06 22:18:29,751 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,SelfDestructingSolverStorable14 [2022-04-06 22:18:29,751 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:18:29,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:18:29,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1181721515, now seen corresponding path program 5 times [2022-04-06 22:18:29,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:29,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [884237718] [2022-04-06 22:18:29,752 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:18:29,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1181721515, now seen corresponding path program 6 times [2022-04-06 22:18:29,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:18:29,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988508889] [2022-04-06 22:18:29,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:18:29,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:18:29,757 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:18:29,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [794612826] [2022-04-06 22:18:29,758 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 22:18:29,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:18:29,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:18:29,759 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) [2022-04-06 22:18:29,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-06 22:18:29,804 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 22:18:29,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:18:29,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 32 conjunts are in the unsatisfiable core [2022-04-06 22:18:29,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:18:30,034 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 27 proven. 27 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-04-06 22:18:30,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:18:30,246 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 31 proven. 18 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-04-06 22:18:30,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:18:30,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988508889] [2022-04-06 22:18:30,247 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:18:30,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794612826] [2022-04-06 22:18:30,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794612826] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:18:30,247 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:18:30,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2022-04-06 22:18:30,247 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:18:30,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [884237718] [2022-04-06 22:18:30,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [884237718] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:18:30,247 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:18:30,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 22:18:30,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387787518] [2022-04-06 22:18:30,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:18:30,248 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 22:18:30,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:30,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 22:18:30,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-04-06 22:18:30,248 INFO L87 Difference]: Start difference. First operand 190 states and 232 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-04-06 22:18:30,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:18:30,439 INFO L93 Difference]: Finished difference Result 214 states and 271 transitions. [2022-04-06 22:18:30,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 22:18:30,439 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 71 [2022-04-06 22:18:30,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:18:30,440 INFO L225 Difference]: With dead ends: 214 [2022-04-06 22:18:30,440 INFO L226 Difference]: Without dead ends: 208 [2022-04-06 22:18:30,441 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 127 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-04-06 22:18:30,441 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 14 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 22:18:30,441 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 199 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 22:18:30,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-04-06 22:18:30,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 192. [2022-04-06 22:18:30,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 117 states have (on average 1.170940170940171) internal successors, (137), 125 states have internal predecessors, (137), 51 states have call successors, (51), 24 states have call predecessors, (51), 23 states have return successors, (48), 42 states have call predecessors, (48), 48 states have call successors, (48) [2022-04-06 22:18:30,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 236 transitions. [2022-04-06 22:18:30,455 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 236 transitions. Word has length 71 [2022-04-06 22:18:30,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:18:30,455 INFO L478 AbstractCegarLoop]: Abstraction has 192 states and 236 transitions. [2022-04-06 22:18:30,455 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-04-06 22:18:30,455 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 236 transitions. [2022-04-06 22:18:30,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-04-06 22:18:30,464 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:18:30,464 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:18:30,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-04-06 22:18:30,679 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:18:30,679 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:18:30,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:18:30,680 INFO L85 PathProgramCache]: Analyzing trace with hash 787354729, now seen corresponding path program 3 times [2022-04-06 22:18:30,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:30,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [592135078] [2022-04-06 22:18:30,680 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:18:30,680 INFO L85 PathProgramCache]: Analyzing trace with hash 787354729, now seen corresponding path program 4 times [2022-04-06 22:18:30,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:18:30,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84308874] [2022-04-06 22:18:30,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:18:30,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:18:30,686 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:18:30,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [732420522] [2022-04-06 22:18:30,686 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 22:18:30,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:18:30,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:18:30,687 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) [2022-04-06 22:18:30,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-06 22:18:30,732 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 22:18:30,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:18:30,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 32 conjunts are in the unsatisfiable core [2022-04-06 22:18:30,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:18:31,038 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 30 proven. 24 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-04-06 22:18:31,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:18:31,296 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 35 proven. 19 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-04-06 22:18:31,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:18:31,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84308874] [2022-04-06 22:18:31,297 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:18:31,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732420522] [2022-04-06 22:18:31,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732420522] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:18:31,297 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:18:31,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2022-04-06 22:18:31,297 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:18:31,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [592135078] [2022-04-06 22:18:31,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [592135078] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:18:31,297 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:18:31,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 22:18:31,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531426982] [2022-04-06 22:18:31,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:18:31,298 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 22:18:31,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:31,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 22:18:31,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-04-06 22:18:31,298 INFO L87 Difference]: Start difference. First operand 192 states and 236 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-04-06 22:18:31,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:18:31,582 INFO L93 Difference]: Finished difference Result 219 states and 281 transitions. [2022-04-06 22:18:31,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 22:18:31,582 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 71 [2022-04-06 22:18:31,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:18:31,583 INFO L225 Difference]: With dead ends: 219 [2022-04-06 22:18:31,583 INFO L226 Difference]: Without dead ends: 210 [2022-04-06 22:18:31,584 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 127 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-04-06 22:18:31,584 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 16 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 22:18:31,584 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 162 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 22:18:31,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-04-06 22:18:31,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 208. [2022-04-06 22:18:31,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 126 states have (on average 1.1825396825396826) internal successors, (149), 134 states have internal predecessors, (149), 57 states have call successors, (57), 25 states have call predecessors, (57), 24 states have return successors, (54), 48 states have call predecessors, (54), 54 states have call successors, (54) [2022-04-06 22:18:31,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 260 transitions. [2022-04-06 22:18:31,599 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 260 transitions. Word has length 71 [2022-04-06 22:18:31,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:18:31,599 INFO L478 AbstractCegarLoop]: Abstraction has 208 states and 260 transitions. [2022-04-06 22:18:31,599 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-04-06 22:18:31,599 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 260 transitions. [2022-04-06 22:18:31,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-04-06 22:18:31,600 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:18:31,600 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:18:31,617 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-04-06 22:18:31,811 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,SelfDestructingSolverStorable16 [2022-04-06 22:18:31,811 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:18:31,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:18:31,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1898774094, now seen corresponding path program 5 times [2022-04-06 22:18:31,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:31,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [349329124] [2022-04-06 22:18:31,812 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:18:31,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1898774094, now seen corresponding path program 6 times [2022-04-06 22:18:31,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:18:31,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486508207] [2022-04-06 22:18:31,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:18:31,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:18:31,817 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:18:31,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1410174011] [2022-04-06 22:18:31,818 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 22:18:31,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:18:31,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:18:31,819 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) [2022-04-06 22:18:31,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-06 22:18:31,863 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-04-06 22:18:31,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:18:31,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 22:18:31,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:18:31,981 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 18 proven. 135 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-06 22:18:31,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:18:32,133 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 18 proven. 27 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-04-06 22:18:32,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:18:32,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486508207] [2022-04-06 22:18:32,134 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:18:32,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410174011] [2022-04-06 22:18:32,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410174011] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:18:32,134 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:18:32,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-04-06 22:18:32,134 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:18:32,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [349329124] [2022-04-06 22:18:32,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [349329124] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:18:32,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:18:32,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 22:18:32,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672184786] [2022-04-06 22:18:32,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:18:32,135 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 22:18:32,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:32,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 22:18:32,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-04-06 22:18:32,136 INFO L87 Difference]: Start difference. First operand 208 states and 260 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2022-04-06 22:18:32,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:18:32,194 INFO L93 Difference]: Finished difference Result 277 states and 329 transitions. [2022-04-06 22:18:32,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 22:18:32,197 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) Word has length 80 [2022-04-06 22:18:32,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:18:32,198 INFO L225 Difference]: With dead ends: 277 [2022-04-06 22:18:32,198 INFO L226 Difference]: Without dead ends: 250 [2022-04-06 22:18:32,198 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2022-04-06 22:18:32,199 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 10 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 22:18:32,199 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 163 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 22:18:32,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-04-06 22:18:32,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 229. [2022-04-06 22:18:32,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 146 states have (on average 1.143835616438356) internal successors, (167), 153 states have internal predecessors, (167), 52 states have call successors, (52), 31 states have call predecessors, (52), 30 states have return successors, (49), 44 states have call predecessors, (49), 49 states have call successors, (49) [2022-04-06 22:18:32,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 268 transitions. [2022-04-06 22:18:32,221 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 268 transitions. Word has length 80 [2022-04-06 22:18:32,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:18:32,222 INFO L478 AbstractCegarLoop]: Abstraction has 229 states and 268 transitions. [2022-04-06 22:18:32,222 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2022-04-06 22:18:32,222 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 268 transitions. [2022-04-06 22:18:32,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-04-06 22:18:32,222 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:18:32,222 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:18:32,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-04-06 22:18:32,423 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,SelfDestructingSolverStorable17 [2022-04-06 22:18:32,423 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:18:32,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:18:32,424 INFO L85 PathProgramCache]: Analyzing trace with hash 629296923, now seen corresponding path program 7 times [2022-04-06 22:18:32,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:32,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [267989998] [2022-04-06 22:18:32,424 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:18:32,424 INFO L85 PathProgramCache]: Analyzing trace with hash 629296923, now seen corresponding path program 8 times [2022-04-06 22:18:32,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:18:32,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533705534] [2022-04-06 22:18:32,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:18:32,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:18:32,429 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:18:32,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [74994737] [2022-04-06 22:18:32,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:18:32,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:18:32,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:18:32,430 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) [2022-04-06 22:18:32,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-04-06 22:18:32,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:18:32,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:18:32,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-06 22:18:32,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:18:32,937 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 23 proven. 33 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2022-04-06 22:18:32,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:18:33,238 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 20 proven. 33 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-04-06 22:18:33,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:18:33,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533705534] [2022-04-06 22:18:33,238 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:18:33,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74994737] [2022-04-06 22:18:33,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74994737] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:18:33,239 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:18:33,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 15 [2022-04-06 22:18:33,239 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:18:33,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [267989998] [2022-04-06 22:18:33,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [267989998] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:18:33,239 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:18:33,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 22:18:33,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611095859] [2022-04-06 22:18:33,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:18:33,239 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 22:18:33,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:33,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 22:18:33,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-04-06 22:18:33,240 INFO L87 Difference]: Start difference. First operand 229 states and 268 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2022-04-06 22:18:33,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:18:33,588 INFO L93 Difference]: Finished difference Result 256 states and 307 transitions. [2022-04-06 22:18:33,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 22:18:33,589 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 85 [2022-04-06 22:18:33,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:18:33,590 INFO L225 Difference]: With dead ends: 256 [2022-04-06 22:18:33,590 INFO L226 Difference]: Without dead ends: 254 [2022-04-06 22:18:33,590 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 155 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-04-06 22:18:33,590 INFO L913 BasicCegarLoop]: 55 mSDtfsCounter, 25 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 22:18:33,591 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 257 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 22:18:33,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-04-06 22:18:33,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 238. [2022-04-06 22:18:33,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 151 states have (on average 1.1456953642384107) internal successors, (173), 158 states have internal predecessors, (173), 55 states have call successors, (55), 32 states have call predecessors, (55), 31 states have return successors, (52), 47 states have call predecessors, (52), 52 states have call successors, (52) [2022-04-06 22:18:33,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 280 transitions. [2022-04-06 22:18:33,609 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 280 transitions. Word has length 85 [2022-04-06 22:18:33,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:18:33,609 INFO L478 AbstractCegarLoop]: Abstraction has 238 states and 280 transitions. [2022-04-06 22:18:33,610 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2022-04-06 22:18:33,610 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 280 transitions. [2022-04-06 22:18:33,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-04-06 22:18:33,610 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:18:33,610 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 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] [2022-04-06 22:18:33,627 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-04-06 22:18:33,823 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:18:33,823 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:18:33,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:18:33,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1330896797, now seen corresponding path program 7 times [2022-04-06 22:18:33,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:33,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [123968053] [2022-04-06 22:18:33,824 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:18:33,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1330896797, now seen corresponding path program 8 times [2022-04-06 22:18:33,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:18:33,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765558755] [2022-04-06 22:18:33,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:18:33,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:18:33,831 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:18:33,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [613983061] [2022-04-06 22:18:33,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:18:33,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:18:33,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:18:33,834 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) [2022-04-06 22:18:33,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-04-06 22:18:33,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:18:33,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:18:33,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-06 22:18:33,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:18:34,415 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 20 proven. 33 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-04-06 22:18:34,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:18:34,847 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 20 proven. 33 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-04-06 22:18:34,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:18:34,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765558755] [2022-04-06 22:18:34,848 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:18:34,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613983061] [2022-04-06 22:18:34,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613983061] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:18:34,848 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:18:34,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2022-04-06 22:18:34,848 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:18:34,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [123968053] [2022-04-06 22:18:34,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [123968053] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:18:34,848 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:18:34,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 22:18:34,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319481519] [2022-04-06 22:18:34,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:18:34,849 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 22:18:34,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:34,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 22:18:34,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-04-06 22:18:34,849 INFO L87 Difference]: Start difference. First operand 238 states and 280 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 5 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) [2022-04-06 22:18:35,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:18:35,147 INFO L93 Difference]: Finished difference Result 286 states and 341 transitions. [2022-04-06 22:18:35,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 22:18:35,148 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 5 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 85 [2022-04-06 22:18:35,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:18:35,149 INFO L225 Difference]: With dead ends: 286 [2022-04-06 22:18:35,149 INFO L226 Difference]: Without dead ends: 284 [2022-04-06 22:18:35,150 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 158 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-04-06 22:18:35,151 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 9 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 22:18:35,151 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 246 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 22:18:35,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-04-06 22:18:35,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 268. [2022-04-06 22:18:35,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 171 states have (on average 1.1403508771929824) internal successors, (195), 178 states have internal predecessors, (195), 61 states have call successors, (61), 36 states have call predecessors, (61), 35 states have return successors, (58), 53 states have call predecessors, (58), 58 states have call successors, (58) [2022-04-06 22:18:35,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 314 transitions. [2022-04-06 22:18:35,177 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 314 transitions. Word has length 85 [2022-04-06 22:18:35,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:18:35,177 INFO L478 AbstractCegarLoop]: Abstraction has 268 states and 314 transitions. [2022-04-06 22:18:35,177 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 5 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) [2022-04-06 22:18:35,177 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 314 transitions. [2022-04-06 22:18:35,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-04-06 22:18:35,178 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:18:35,178 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 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] [2022-04-06 22:18:35,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-04-06 22:18:35,395 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:18:35,395 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:18:35,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:18:35,396 INFO L85 PathProgramCache]: Analyzing trace with hash 148216665, now seen corresponding path program 9 times [2022-04-06 22:18:35,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:35,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1600831409] [2022-04-06 22:18:35,396 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:18:35,396 INFO L85 PathProgramCache]: Analyzing trace with hash 148216665, now seen corresponding path program 10 times [2022-04-06 22:18:35,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:18:35,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749221252] [2022-04-06 22:18:35,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:18:35,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:18:35,404 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:18:35,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [943435443] [2022-04-06 22:18:35,404 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 22:18:35,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:18:35,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:18:35,405 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) [2022-04-06 22:18:35,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-04-06 22:18:35,443 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 22:18:35,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:18:35,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 48 conjunts are in the unsatisfiable core [2022-04-06 22:18:35,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:18:35,930 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 65 proven. 51 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-04-06 22:18:35,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:18:36,200 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 78 proven. 8 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-04-06 22:18:36,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:18:36,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749221252] [2022-04-06 22:18:36,201 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:18:36,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943435443] [2022-04-06 22:18:36,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943435443] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:18:36,201 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:18:36,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2022-04-06 22:18:36,201 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:18:36,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1600831409] [2022-04-06 22:18:36,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1600831409] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:18:36,202 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:18:36,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 22:18:36,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319078172] [2022-04-06 22:18:36,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:18:36,203 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 22:18:36,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:36,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 22:18:36,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-04-06 22:18:36,203 INFO L87 Difference]: Start difference. First operand 268 states and 314 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-04-06 22:18:36,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:18:36,666 INFO L93 Difference]: Finished difference Result 297 states and 355 transitions. [2022-04-06 22:18:36,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 22:18:36,667 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 85 [2022-04-06 22:18:36,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:18:36,669 INFO L225 Difference]: With dead ends: 297 [2022-04-06 22:18:36,669 INFO L226 Difference]: Without dead ends: 295 [2022-04-06 22:18:36,669 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 153 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-04-06 22:18:36,669 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 16 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 22:18:36,669 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 211 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 22:18:36,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-04-06 22:18:36,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 249. [2022-04-06 22:18:36,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 158 states have (on average 1.1455696202531647) internal successors, (181), 165 states have internal predecessors, (181), 58 states have call successors, (58), 33 states have call predecessors, (58), 32 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2022-04-06 22:18:36,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 294 transitions. [2022-04-06 22:18:36,694 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 294 transitions. Word has length 85 [2022-04-06 22:18:36,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:18:36,694 INFO L478 AbstractCegarLoop]: Abstraction has 249 states and 294 transitions. [2022-04-06 22:18:36,695 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-04-06 22:18:36,695 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 294 transitions. [2022-04-06 22:18:36,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-04-06 22:18:36,695 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:18:36,695 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 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] [2022-04-06 22:18:36,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-04-06 22:18:36,908 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:18:36,909 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:18:36,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:18:36,909 INFO L85 PathProgramCache]: Analyzing trace with hash 849816539, now seen corresponding path program 11 times [2022-04-06 22:18:36,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:36,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1734917123] [2022-04-06 22:18:36,909 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:18:36,909 INFO L85 PathProgramCache]: Analyzing trace with hash 849816539, now seen corresponding path program 12 times [2022-04-06 22:18:36,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:18:36,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974059668] [2022-04-06 22:18:36,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:18:36,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:18:36,918 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:18:36,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2001598078] [2022-04-06 22:18:36,918 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 22:18:36,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:18:36,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:18:36,920 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) [2022-04-06 22:18:36,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-04-06 22:18:36,991 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 22:18:36,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:18:36,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-06 22:18:36,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:18:37,275 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 66 proven. 33 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2022-04-06 22:18:37,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:18:37,433 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 22:18:37,436 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 22:18:51,432 WARN L232 SmtUtils]: Spent 12.14s on a formula simplification. DAG size of input: 63 DAG size of output: 62 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 22:18:51,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:18:51,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974059668] [2022-04-06 22:18:51,434 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:18:51,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001598078] [2022-04-06 22:18:51,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001598078] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 22:18:51,435 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 22:18:51,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-04-06 22:18:51,435 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:18:51,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1734917123] [2022-04-06 22:18:51,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1734917123] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:18:51,436 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:18:51,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 22:18:51,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367770517] [2022-04-06 22:18:51,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:18:51,437 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 22:18:51,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:51,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 22:18:51,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-04-06 22:18:51,437 INFO L87 Difference]: Start difference. First operand 249 states and 294 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-04-06 22:18:51,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:18:51,910 INFO L93 Difference]: Finished difference Result 315 states and 392 transitions. [2022-04-06 22:18:51,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 22:18:51,910 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) Word has length 85 [2022-04-06 22:18:51,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:18:51,912 INFO L225 Difference]: With dead ends: 315 [2022-04-06 22:18:51,912 INFO L226 Difference]: Without dead ends: 309 [2022-04-06 22:18:51,912 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-04-06 22:18:51,912 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 26 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 22:18:51,913 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 192 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 22:18:51,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2022-04-06 22:18:51,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 265. [2022-04-06 22:18:51,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 167 states have (on average 1.1437125748502994) internal successors, (191), 175 states have internal predecessors, (191), 63 states have call successors, (63), 35 states have call predecessors, (63), 34 states have return successors, (59), 54 states have call predecessors, (59), 59 states have call successors, (59) [2022-04-06 22:18:51,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 313 transitions. [2022-04-06 22:18:51,942 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 313 transitions. Word has length 85 [2022-04-06 22:18:51,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:18:51,942 INFO L478 AbstractCegarLoop]: Abstraction has 265 states and 313 transitions. [2022-04-06 22:18:51,942 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-04-06 22:18:51,942 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 313 transitions. [2022-04-06 22:18:51,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-04-06 22:18:51,943 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:18:51,943 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:18:51,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-04-06 22:18:52,159 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-04-06 22:18:52,160 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:18:52,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:18:52,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1358919972, now seen corresponding path program 13 times [2022-04-06 22:18:52,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:52,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [175163617] [2022-04-06 22:18:52,160 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:18:52,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1358919972, now seen corresponding path program 14 times [2022-04-06 22:18:52,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:18:52,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783003670] [2022-04-06 22:18:52,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:18:52,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:18:52,168 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:18:52,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [774605212] [2022-04-06 22:18:52,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:18:52,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:18:52,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:18:52,171 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) [2022-04-06 22:18:52,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-04-06 22:18:52,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:18:52,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:18:52,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-06 22:18:52,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:18:52,796 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 22 proven. 36 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-04-06 22:18:52,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:18:53,188 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 22 proven. 36 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-04-06 22:18:53,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:18:53,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783003670] [2022-04-06 22:18:53,189 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:18:53,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774605212] [2022-04-06 22:18:53,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774605212] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:18:53,189 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:18:53,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-04-06 22:18:53,189 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:18:53,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [175163617] [2022-04-06 22:18:53,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [175163617] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:18:53,189 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:18:53,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 22:18:53,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158813716] [2022-04-06 22:18:53,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:18:53,190 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 22:18:53,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:53,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 22:18:53,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-04-06 22:18:53,191 INFO L87 Difference]: Start difference. First operand 265 states and 313 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-04-06 22:18:53,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:18:53,917 INFO L93 Difference]: Finished difference Result 291 states and 354 transitions. [2022-04-06 22:18:53,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 22:18:53,918 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 90 [2022-04-06 22:18:53,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:18:53,919 INFO L225 Difference]: With dead ends: 291 [2022-04-06 22:18:53,919 INFO L226 Difference]: Without dead ends: 285 [2022-04-06 22:18:53,919 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 166 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-04-06 22:18:53,920 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 10 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 22:18:53,920 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 250 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 22:18:53,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-04-06 22:18:53,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 269. [2022-04-06 22:18:53,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 169 states have (on average 1.1420118343195267) internal successors, (193), 178 states have internal predecessors, (193), 65 states have call successors, (65), 35 states have call predecessors, (65), 34 states have return successors, (61), 55 states have call predecessors, (61), 61 states have call successors, (61) [2022-04-06 22:18:53,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 319 transitions. [2022-04-06 22:18:53,952 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 319 transitions. Word has length 90 [2022-04-06 22:18:53,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:18:53,952 INFO L478 AbstractCegarLoop]: Abstraction has 269 states and 319 transitions. [2022-04-06 22:18:53,953 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-04-06 22:18:53,953 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 319 transitions. [2022-04-06 22:18:53,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-04-06 22:18:53,953 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:18:53,953 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:18:53,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-04-06 22:18:54,167 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-04-06 22:18:54,167 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:18:54,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:18:54,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1753286758, now seen corresponding path program 15 times [2022-04-06 22:18:54,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:54,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1675212724] [2022-04-06 22:18:54,168 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:18:54,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1753286758, now seen corresponding path program 16 times [2022-04-06 22:18:54,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:18:54,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492033556] [2022-04-06 22:18:54,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:18:54,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:18:54,173 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:18:54,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2132760564] [2022-04-06 22:18:54,173 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 22:18:54,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:18:54,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:18:54,174 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) [2022-04-06 22:18:54,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-04-06 22:18:54,214 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 22:18:54,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:18:54,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 46 conjunts are in the unsatisfiable core [2022-04-06 22:18:54,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:18:54,684 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 70 proven. 60 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2022-04-06 22:18:54,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:18:54,929 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 82 proven. 15 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2022-04-06 22:18:54,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:18:54,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492033556] [2022-04-06 22:18:54,929 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:18:54,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132760564] [2022-04-06 22:18:54,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132760564] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:18:54,930 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:18:54,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2022-04-06 22:18:54,930 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:18:54,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1675212724] [2022-04-06 22:18:54,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1675212724] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:18:54,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:18:54,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 22:18:54,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338071808] [2022-04-06 22:18:54,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:18:54,931 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 22:18:54,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:54,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 22:18:54,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-04-06 22:18:54,931 INFO L87 Difference]: Start difference. First operand 269 states and 319 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-04-06 22:18:55,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:18:55,552 INFO L93 Difference]: Finished difference Result 310 states and 377 transitions. [2022-04-06 22:18:55,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 22:18:55,553 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 90 [2022-04-06 22:18:55,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:18:55,554 INFO L225 Difference]: With dead ends: 310 [2022-04-06 22:18:55,554 INFO L226 Difference]: Without dead ends: 304 [2022-04-06 22:18:55,555 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 164 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-04-06 22:18:55,555 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 15 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 22:18:55,555 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 211 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 22:18:55,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-04-06 22:18:55,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 284. [2022-04-06 22:18:55,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 179 states have (on average 1.1396648044692737) internal successors, (204), 188 states have internal predecessors, (204), 68 states have call successors, (68), 37 states have call predecessors, (68), 36 states have return successors, (64), 58 states have call predecessors, (64), 64 states have call successors, (64) [2022-04-06 22:18:55,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 336 transitions. [2022-04-06 22:18:55,591 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 336 transitions. Word has length 90 [2022-04-06 22:18:55,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:18:55,591 INFO L478 AbstractCegarLoop]: Abstraction has 284 states and 336 transitions. [2022-04-06 22:18:55,592 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-04-06 22:18:55,592 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 336 transitions. [2022-04-06 22:18:55,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-04-06 22:18:55,592 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:18:55,592 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:18:55,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-04-06 22:18:55,808 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:18:55,809 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:18:55,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:18:55,809 INFO L85 PathProgramCache]: Analyzing trace with hash 27865438, now seen corresponding path program 17 times [2022-04-06 22:18:55,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:55,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1644978339] [2022-04-06 22:18:55,809 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:18:55,810 INFO L85 PathProgramCache]: Analyzing trace with hash 27865438, now seen corresponding path program 18 times [2022-04-06 22:18:55,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:18:55,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777667275] [2022-04-06 22:18:55,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:18:55,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:18:55,815 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:18:55,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [162167482] [2022-04-06 22:18:55,815 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 22:18:55,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:18:55,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:18:55,818 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) [2022-04-06 22:18:55,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-04-06 22:18:55,932 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 22:18:55,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:18:55,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-06 22:18:55,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:19:02,414 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 71 proven. 34 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2022-04-06 22:19:02,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:19:02,676 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 90 proven. 5 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2022-04-06 22:19:02,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:19:02,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777667275] [2022-04-06 22:19:02,676 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:19:02,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162167482] [2022-04-06 22:19:02,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162167482] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:19:02,677 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:19:02,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 14 [2022-04-06 22:19:02,677 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:19:02,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1644978339] [2022-04-06 22:19:02,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1644978339] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:19:02,677 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:19:02,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 22:19:02,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520680659] [2022-04-06 22:19:02,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:19:02,677 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 22:19:02,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:19:02,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 22:19:02,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=143, Unknown=1, NotChecked=0, Total=182 [2022-04-06 22:19:02,678 INFO L87 Difference]: Start difference. First operand 284 states and 336 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 6 states have call predecessors, (11), 4 states have call successors, (11) [2022-04-06 22:19:04,672 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 22:19:14,211 WARN L232 SmtUtils]: Spent 9.52s on a formula simplification. DAG size of input: 57 DAG size of output: 31 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 22:19:17,562 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 22:19:19,575 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 22:19:21,626 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 22:19:23,746 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 22:19:25,793 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 22:19:28,159 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 22:19:30,258 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 [] [2022-04-06 22:19:31,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:19:31,007 INFO L93 Difference]: Finished difference Result 319 states and 384 transitions. [2022-04-06 22:19:31,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 22:19:31,008 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 6 states have call predecessors, (11), 4 states have call successors, (11) Word has length 90 [2022-04-06 22:19:31,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:19:31,009 INFO L225 Difference]: With dead ends: 319 [2022-04-06 22:19:31,009 INFO L226 Difference]: Without dead ends: 305 [2022-04-06 22:19:31,010 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 165 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=57, Invalid=214, Unknown=1, NotChecked=0, Total=272 [2022-04-06 22:19:31,010 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 20 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 19 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.7s IncrementalHoareTripleChecker+Time [2022-04-06 22:19:31,010 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 237 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 507 Invalid, 7 Unknown, 0 Unchecked, 18.7s Time] [2022-04-06 22:19:31,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2022-04-06 22:19:31,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 299. [2022-04-06 22:19:31,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 191 states have (on average 1.1413612565445026) internal successors, (218), 198 states have internal predecessors, (218), 69 states have call successors, (69), 39 states have call predecessors, (69), 38 states have return successors, (65), 61 states have call predecessors, (65), 65 states have call successors, (65) [2022-04-06 22:19:31,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 352 transitions. [2022-04-06 22:19:31,065 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 352 transitions. Word has length 90 [2022-04-06 22:19:31,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:19:31,066 INFO L478 AbstractCegarLoop]: Abstraction has 299 states and 352 transitions. [2022-04-06 22:19:31,066 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 6 states have call predecessors, (11), 4 states have call successors, (11) [2022-04-06 22:19:31,066 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 352 transitions. [2022-04-06 22:19:31,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-04-06 22:19:31,066 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:19:31,067 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:19:31,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-04-06 22:19:31,281 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:19:31,281 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:19:31,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:19:31,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1449122399, now seen corresponding path program 7 times [2022-04-06 22:19:31,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:19:31,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [360901033] [2022-04-06 22:19:31,282 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:19:31,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1449122399, now seen corresponding path program 8 times [2022-04-06 22:19:31,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:19:31,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902189669] [2022-04-06 22:19:31,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:19:31,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:19:31,287 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:19:31,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2056074612] [2022-04-06 22:19:31,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:19:31,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:19:31,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:19:31,289 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) [2022-04-06 22:19:31,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-04-06 22:19:31,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:19:31,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:19:31,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 22:19:31,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:19:31,482 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 24 proven. 266 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-04-06 22:19:31,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:19:31,639 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 24 proven. 50 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-04-06 22:19:31,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:19:31,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902189669] [2022-04-06 22:19:31,640 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:19:31,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056074612] [2022-04-06 22:19:31,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056074612] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:19:31,640 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:19:31,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-04-06 22:19:31,640 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:19:31,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [360901033] [2022-04-06 22:19:31,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [360901033] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:19:31,640 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:19:31,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 22:19:31,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341493245] [2022-04-06 22:19:31,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:19:31,641 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 22:19:31,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:19:31,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 22:19:31,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-04-06 22:19:31,642 INFO L87 Difference]: Start difference. First operand 299 states and 352 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, (17), 7 states have call predecessors, (17), 5 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2022-04-06 22:19:31,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:19:31,753 INFO L93 Difference]: Finished difference Result 386 states and 447 transitions. [2022-04-06 22:19:31,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 22:19:31,753 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, (17), 7 states have call predecessors, (17), 5 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) Word has length 99 [2022-04-06 22:19:31,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:19:31,755 INFO L225 Difference]: With dead ends: 386 [2022-04-06 22:19:31,755 INFO L226 Difference]: Without dead ends: 363 [2022-04-06 22:19:31,755 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=183, Unknown=0, NotChecked=0, Total=306 [2022-04-06 22:19:31,756 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 17 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 22:19:31,756 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 175 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 22:19:31,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2022-04-06 22:19:31,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 355. [2022-04-06 22:19:31,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 234 states have (on average 1.123931623931624) internal successors, (263), 240 states have internal predecessors, (263), 73 states have call successors, (73), 48 states have call predecessors, (73), 47 states have return successors, (69), 66 states have call predecessors, (69), 69 states have call successors, (69) [2022-04-06 22:19:31,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 405 transitions. [2022-04-06 22:19:31,814 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 405 transitions. Word has length 99 [2022-04-06 22:19:31,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:19:31,814 INFO L478 AbstractCegarLoop]: Abstraction has 355 states and 405 transitions. [2022-04-06 22:19:31,814 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, (17), 7 states have call predecessors, (17), 5 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2022-04-06 22:19:31,814 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 405 transitions. [2022-04-06 22:19:31,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-04-06 22:19:31,815 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:19:31,815 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:19:31,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-04-06 22:19:32,019 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-04-06 22:19:32,020 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:19:32,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:19:32,020 INFO L85 PathProgramCache]: Analyzing trace with hash 340347020, now seen corresponding path program 9 times [2022-04-06 22:19:32,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:19:32,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1969831876] [2022-04-06 22:19:32,021 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:19:32,021 INFO L85 PathProgramCache]: Analyzing trace with hash 340347020, now seen corresponding path program 10 times [2022-04-06 22:19:32,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:19:32,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655713544] [2022-04-06 22:19:32,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:19:32,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:19:32,026 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:19:32,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [394894039] [2022-04-06 22:19:32,026 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 22:19:32,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:19:32,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:19:32,027 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) [2022-04-06 22:19:32,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-04-06 22:19:32,073 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 22:19:32,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:19:32,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 52 conjunts are in the unsatisfiable core [2022-04-06 22:19:32,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:19:32,808 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 77 proven. 97 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2022-04-06 22:19:32,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:19:33,134 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 108 proven. 27 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2022-04-06 22:19:33,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:19:33,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655713544] [2022-04-06 22:19:33,135 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:19:33,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394894039] [2022-04-06 22:19:33,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394894039] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:19:33,135 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:19:33,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2022-04-06 22:19:33,135 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:19:33,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1969831876] [2022-04-06 22:19:33,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1969831876] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:19:33,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:19:33,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 22:19:33,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802338293] [2022-04-06 22:19:33,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:19:33,136 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 22:19:33,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:19:33,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 22:19:33,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2022-04-06 22:19:33,136 INFO L87 Difference]: Start difference. First operand 355 states and 405 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-04-06 22:19:34,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:19:34,008 INFO L93 Difference]: Finished difference Result 382 states and 444 transitions. [2022-04-06 22:19:34,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 22:19:34,008 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 104 [2022-04-06 22:19:34,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:19:34,010 INFO L225 Difference]: With dead ends: 382 [2022-04-06 22:19:34,010 INFO L226 Difference]: Without dead ends: 380 [2022-04-06 22:19:34,010 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 189 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2022-04-06 22:19:34,011 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 15 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 22:19:34,011 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 260 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 22:19:34,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2022-04-06 22:19:34,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 364. [2022-04-06 22:19:34,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 239 states have (on average 1.1255230125523012) internal successors, (269), 245 states have internal predecessors, (269), 76 states have call successors, (76), 49 states have call predecessors, (76), 48 states have return successors, (72), 69 states have call predecessors, (72), 72 states have call successors, (72) [2022-04-06 22:19:34,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 417 transitions. [2022-04-06 22:19:34,062 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 417 transitions. Word has length 104 [2022-04-06 22:19:34,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:19:34,062 INFO L478 AbstractCegarLoop]: Abstraction has 364 states and 417 transitions. [2022-04-06 22:19:34,062 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-04-06 22:19:34,062 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 417 transitions. [2022-04-06 22:19:34,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-04-06 22:19:34,063 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:19:34,063 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:19:34,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-04-06 22:19:34,280 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,SelfDestructingSolverStorable26 [2022-04-06 22:19:34,280 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:19:34,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:19:34,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1041946894, now seen corresponding path program 19 times [2022-04-06 22:19:34,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:19:34,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1381343423] [2022-04-06 22:19:34,281 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:19:34,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1041946894, now seen corresponding path program 20 times [2022-04-06 22:19:34,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:19:34,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423686393] [2022-04-06 22:19:34,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:19:34,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:19:34,286 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:19:34,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1537193696] [2022-04-06 22:19:34,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:19:34,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:19:34,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:19:34,288 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) [2022-04-06 22:19:34,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-04-06 22:19:34,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:19:34,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:19:34,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 45 conjunts are in the unsatisfiable core [2022-04-06 22:19:34,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:19:34,984 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 22:19:35,015 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 26 proven. 58 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-04-06 22:19:35,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:19:35,618 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 26 proven. 58 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-04-06 22:19:35,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:19:35,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423686393] [2022-04-06 22:19:35,619 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:19:35,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537193696] [2022-04-06 22:19:35,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537193696] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:19:35,619 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:19:35,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-04-06 22:19:35,619 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:19:35,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1381343423] [2022-04-06 22:19:35,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1381343423] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:19:35,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:19:35,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 22:19:35,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804733206] [2022-04-06 22:19:35,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:19:35,620 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 22:19:35,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:19:35,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 22:19:35,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-04-06 22:19:35,620 INFO L87 Difference]: Start difference. First operand 364 states and 417 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-04-06 22:19:35,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:19:35,998 INFO L93 Difference]: Finished difference Result 412 states and 478 transitions. [2022-04-06 22:19:35,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 22:19:35,998 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 104 [2022-04-06 22:19:35,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:19:36,000 INFO L225 Difference]: With dead ends: 412 [2022-04-06 22:19:36,000 INFO L226 Difference]: Without dead ends: 410 [2022-04-06 22:19:36,000 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 192 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-04-06 22:19:36,001 INFO L913 BasicCegarLoop]: 63 mSDtfsCounter, 10 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 22:19:36,001 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 294 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 22:19:36,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2022-04-06 22:19:36,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 394. [2022-04-06 22:19:36,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 259 states have (on average 1.1235521235521235) internal successors, (291), 265 states have internal predecessors, (291), 82 states have call successors, (82), 53 states have call predecessors, (82), 52 states have return successors, (78), 75 states have call predecessors, (78), 78 states have call successors, (78) [2022-04-06 22:19:36,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 451 transitions. [2022-04-06 22:19:36,060 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 451 transitions. Word has length 104 [2022-04-06 22:19:36,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:19:36,060 INFO L478 AbstractCegarLoop]: Abstraction has 394 states and 451 transitions. [2022-04-06 22:19:36,060 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-04-06 22:19:36,061 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 451 transitions. [2022-04-06 22:19:36,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-04-06 22:19:36,061 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:19:36,061 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:19:36,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-04-06 22:19:36,275 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,SelfDestructingSolverStorable27 [2022-04-06 22:19:36,275 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:19:36,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:19:36,276 INFO L85 PathProgramCache]: Analyzing trace with hash -140733238, now seen corresponding path program 21 times [2022-04-06 22:19:36,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:19:36,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1735033500] [2022-04-06 22:19:36,276 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:19:36,277 INFO L85 PathProgramCache]: Analyzing trace with hash -140733238, now seen corresponding path program 22 times [2022-04-06 22:19:36,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:19:36,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494080141] [2022-04-06 22:19:36,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:19:36,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:19:36,283 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:19:36,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [715729262] [2022-04-06 22:19:36,283 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 22:19:36,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:19:36,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:19:36,285 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) [2022-04-06 22:19:36,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-04-06 22:19:36,332 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 22:19:36,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:19:36,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 64 conjunts are in the unsatisfiable core [2022-04-06 22:19:36,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:19:36,940 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 93 proven. 111 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-04-06 22:19:36,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:19:37,211 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 109 proven. 8 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2022-04-06 22:19:37,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:19:37,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494080141] [2022-04-06 22:19:37,212 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:19:37,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715729262] [2022-04-06 22:19:37,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715729262] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:19:37,212 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:19:37,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2022-04-06 22:19:37,212 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:19:37,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1735033500] [2022-04-06 22:19:37,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1735033500] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:19:37,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:19:37,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 22:19:37,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232648816] [2022-04-06 22:19:37,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:19:37,213 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 22:19:37,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:19:37,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 22:19:37,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-04-06 22:19:37,213 INFO L87 Difference]: Start difference. First operand 394 states and 451 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-04-06 22:19:37,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:19:37,824 INFO L93 Difference]: Finished difference Result 446 states and 515 transitions. [2022-04-06 22:19:37,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 22:19:37,824 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 104 [2022-04-06 22:19:37,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:19:37,826 INFO L225 Difference]: With dead ends: 446 [2022-04-06 22:19:37,826 INFO L226 Difference]: Without dead ends: 444 [2022-04-06 22:19:37,826 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 189 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2022-04-06 22:19:37,826 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 16 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 22:19:37,827 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 246 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 22:19:37,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2022-04-06 22:19:37,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 398. [2022-04-06 22:19:37,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 262 states have (on average 1.1221374045801527) internal successors, (294), 268 states have internal predecessors, (294), 82 states have call successors, (82), 54 states have call predecessors, (82), 53 states have return successors, (78), 75 states have call predecessors, (78), 78 states have call successors, (78) [2022-04-06 22:19:37,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 454 transitions. [2022-04-06 22:19:37,888 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 454 transitions. Word has length 104 [2022-04-06 22:19:37,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:19:37,888 INFO L478 AbstractCegarLoop]: Abstraction has 398 states and 454 transitions. [2022-04-06 22:19:37,888 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-04-06 22:19:37,888 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 454 transitions. [2022-04-06 22:19:37,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-04-06 22:19:37,889 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:19:37,889 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:19:37,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-04-06 22:19:38,095 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,SelfDestructingSolverStorable28 [2022-04-06 22:19:38,095 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:19:38,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:19:38,096 INFO L85 PathProgramCache]: Analyzing trace with hash 560866636, now seen corresponding path program 23 times [2022-04-06 22:19:38,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:19:38,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [116611117] [2022-04-06 22:19:38,096 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:19:38,096 INFO L85 PathProgramCache]: Analyzing trace with hash 560866636, now seen corresponding path program 24 times [2022-04-06 22:19:38,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:19:38,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334812753] [2022-04-06 22:19:38,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:19:38,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:19:38,103 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:19:38,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [874855043] [2022-04-06 22:19:38,103 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 22:19:38,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:19:38,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:19:38,105 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) [2022-04-06 22:19:38,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-04-06 22:19:38,526 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-04-06 22:19:38,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:19:38,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-06 22:19:38,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:19:40,785 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 107 proven. 40 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-04-06 22:19:40,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:19:41,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:19:41,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334812753] [2022-04-06 22:19:41,837 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:19:41,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874855043] [2022-04-06 22:19:41,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874855043] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 22:19:41,837 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 22:19:41,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-04-06 22:19:41,838 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:19:41,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [116611117] [2022-04-06 22:19:41,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [116611117] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:19:41,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:19:41,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 22:19:41,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236229065] [2022-04-06 22:19:41,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:19:41,838 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 22:19:41,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:19:41,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 22:19:41,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2022-04-06 22:19:41,839 INFO L87 Difference]: Start difference. First operand 398 states and 454 transitions. Second operand has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) [2022-04-06 22:19:45,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:19:45,009 INFO L93 Difference]: Finished difference Result 494 states and 594 transitions. [2022-04-06 22:19:45,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 22:19:45,010 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) Word has length 104 [2022-04-06 22:19:45,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:19:45,017 INFO L225 Difference]: With dead ends: 494 [2022-04-06 22:19:45,017 INFO L226 Difference]: Without dead ends: 488 [2022-04-06 22:19:45,018 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2022-04-06 22:19:45,019 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 46 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-04-06 22:19:45,019 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 245 Invalid, 730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 681 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-04-06 22:19:45,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2022-04-06 22:19:45,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 456. [2022-04-06 22:19:45,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 298 states have (on average 1.1342281879194631) internal successors, (338), 306 states have internal predecessors, (338), 99 states have call successors, (99), 59 states have call predecessors, (99), 58 states have return successors, (95), 90 states have call predecessors, (95), 95 states have call successors, (95) [2022-04-06 22:19:45,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 532 transitions. [2022-04-06 22:19:45,107 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 532 transitions. Word has length 104 [2022-04-06 22:19:45,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:19:45,108 INFO L478 AbstractCegarLoop]: Abstraction has 456 states and 532 transitions. [2022-04-06 22:19:45,108 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) [2022-04-06 22:19:45,108 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 532 transitions. [2022-04-06 22:19:45,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-04-06 22:19:45,109 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:19:45,109 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:19:45,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-04-06 22:19:45,314 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:19:45,315 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:19:45,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:19:45,315 INFO L85 PathProgramCache]: Analyzing trace with hash -152279154, now seen corresponding path program 25 times [2022-04-06 22:19:45,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:19:45,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1209168722] [2022-04-06 22:19:45,315 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:19:45,315 INFO L85 PathProgramCache]: Analyzing trace with hash -152279154, now seen corresponding path program 26 times [2022-04-06 22:19:45,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:19:45,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856237951] [2022-04-06 22:19:45,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:19:45,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:19:45,321 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:19:45,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [240599462] [2022-04-06 22:19:45,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:19:45,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:19:45,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:19:45,325 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) [2022-04-06 22:19:45,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-04-06 22:19:45,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:19:45,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:19:45,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 53 conjunts are in the unsatisfiable core [2022-04-06 22:19:45,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:19:49,741 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 75 proven. 75 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2022-04-06 22:19:49,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:19:50,246 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 115 proven. 20 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2022-04-06 22:19:50,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:19:50,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856237951] [2022-04-06 22:19:50,248 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:19:50,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240599462] [2022-04-06 22:19:50,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240599462] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:19:50,248 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:19:50,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 18 [2022-04-06 22:19:50,248 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:19:50,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1209168722] [2022-04-06 22:19:50,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1209168722] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:19:50,249 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:19:50,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 22:19:50,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560363649] [2022-04-06 22:19:50,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:19:50,250 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 22:19:50,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:19:50,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 22:19:50,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-04-06 22:19:50,251 INFO L87 Difference]: Start difference. First operand 456 states and 532 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-04-06 22:19:51,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:19:51,141 INFO L93 Difference]: Finished difference Result 485 states and 573 transitions. [2022-04-06 22:19:51,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 22:19:51,142 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 104 [2022-04-06 22:19:51,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:19:51,144 INFO L225 Difference]: With dead ends: 485 [2022-04-06 22:19:51,144 INFO L226 Difference]: Without dead ends: 483 [2022-04-06 22:19:51,144 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 189 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2022-04-06 22:19:51,145 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 15 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 22:19:51,145 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 320 Invalid, 703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 693 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 22:19:51,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2022-04-06 22:19:51,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 456. [2022-04-06 22:19:51,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 298 states have (on average 1.1342281879194631) internal successors, (338), 306 states have internal predecessors, (338), 99 states have call successors, (99), 59 states have call predecessors, (99), 58 states have return successors, (95), 90 states have call predecessors, (95), 95 states have call successors, (95) [2022-04-06 22:19:51,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 532 transitions. [2022-04-06 22:19:51,243 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 532 transitions. Word has length 104 [2022-04-06 22:19:51,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:19:51,243 INFO L478 AbstractCegarLoop]: Abstraction has 456 states and 532 transitions. [2022-04-06 22:19:51,243 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-04-06 22:19:51,243 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 532 transitions. [2022-04-06 22:19:51,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-04-06 22:19:51,244 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:19:51,244 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:19:51,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-04-06 22:19:51,451 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:19:51,451 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:19:51,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:19:51,452 INFO L85 PathProgramCache]: Analyzing trace with hash 549320720, now seen corresponding path program 27 times [2022-04-06 22:19:51,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:19:51,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1712077689] [2022-04-06 22:19:51,452 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:19:51,452 INFO L85 PathProgramCache]: Analyzing trace with hash 549320720, now seen corresponding path program 28 times [2022-04-06 22:19:51,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:19:51,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123939448] [2022-04-06 22:19:51,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:19:51,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:19:51,458 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:19:51,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [966358413] [2022-04-06 22:19:51,458 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 22:19:51,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:19:51,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:19:51,459 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) [2022-04-06 22:19:51,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-04-06 22:19:51,511 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 22:19:51,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:19:51,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 52 conjunts are in the unsatisfiable core [2022-04-06 22:19:51,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:19:52,653 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 74 proven. 100 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2022-04-06 22:19:52,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:19:53,359 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 113 proven. 32 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2022-04-06 22:19:53,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:19:53,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123939448] [2022-04-06 22:19:53,360 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:19:53,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966358413] [2022-04-06 22:19:53,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966358413] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:19:53,360 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:19:53,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 19 [2022-04-06 22:19:53,360 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:19:53,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1712077689] [2022-04-06 22:19:53,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1712077689] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:19:53,360 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:19:53,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 22:19:53,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883478149] [2022-04-06 22:19:53,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:19:53,361 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 22:19:53,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:19:53,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 22:19:53,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-04-06 22:19:53,361 INFO L87 Difference]: Start difference. First operand 456 states and 532 transitions. Second operand has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2022-04-06 22:19:55,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:19:55,113 INFO L93 Difference]: Finished difference Result 484 states and 569 transitions. [2022-04-06 22:19:55,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 22:19:55,114 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) Word has length 104 [2022-04-06 22:19:55,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:19:55,116 INFO L225 Difference]: With dead ends: 484 [2022-04-06 22:19:55,116 INFO L226 Difference]: Without dead ends: 482 [2022-04-06 22:19:55,117 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 189 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2022-04-06 22:19:55,118 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 15 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-04-06 22:19:55,118 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 288 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-04-06 22:19:55,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2022-04-06 22:19:55,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 458. [2022-04-06 22:19:55,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 299 states have (on average 1.1337792642140467) internal successors, (339), 307 states have internal predecessors, (339), 99 states have call successors, (99), 60 states have call predecessors, (99), 59 states have return successors, (95), 90 states have call predecessors, (95), 95 states have call successors, (95) [2022-04-06 22:19:55,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 533 transitions. [2022-04-06 22:19:55,230 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 533 transitions. Word has length 104 [2022-04-06 22:19:55,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:19:55,230 INFO L478 AbstractCegarLoop]: Abstraction has 458 states and 533 transitions. [2022-04-06 22:19:55,230 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2022-04-06 22:19:55,230 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 533 transitions. [2022-04-06 22:19:55,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-04-06 22:19:55,231 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:19:55,231 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:19:55,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-04-06 22:19:55,437 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-04-06 22:19:55,437 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:19:55,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:19:55,437 INFO L85 PathProgramCache]: Analyzing trace with hash -633359412, now seen corresponding path program 29 times [2022-04-06 22:19:55,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:19:55,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1496931169] [2022-04-06 22:19:55,438 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:19:55,438 INFO L85 PathProgramCache]: Analyzing trace with hash -633359412, now seen corresponding path program 30 times [2022-04-06 22:19:55,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:19:55,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103366479] [2022-04-06 22:19:55,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:19:55,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:19:55,442 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:19:55,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [943561750] [2022-04-06 22:19:55,443 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 22:19:55,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:19:55,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:19:55,443 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) [2022-04-06 22:19:55,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-04-06 22:19:55,926 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 22:19:55,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:19:55,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 40 conjunts are in the unsatisfiable core [2022-04-06 22:19:55,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:19:56,505 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 58 proven. 41 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2022-04-06 22:19:56,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:20:02,795 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 62 proven. 25 refuted. 0 times theorem prover too weak. 313 trivial. 0 not checked. [2022-04-06 22:20:02,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:20:02,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103366479] [2022-04-06 22:20:02,795 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:20:02,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943561750] [2022-04-06 22:20:02,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943561750] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:20:02,796 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:20:02,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 18 [2022-04-06 22:20:02,796 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:20:02,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1496931169] [2022-04-06 22:20:02,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1496931169] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:20:02,796 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:20:02,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 22:20:02,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770013820] [2022-04-06 22:20:02,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:20:02,796 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 22:20:02,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:20:02,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 22:20:02,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=248, Unknown=2, NotChecked=0, Total=306 [2022-04-06 22:20:02,797 INFO L87 Difference]: Start difference. First operand 458 states and 533 transitions. Second operand has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) [2022-04-06 22:20:05,277 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 [] [2022-04-06 22:20:05,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:20:05,740 INFO L93 Difference]: Finished difference Result 537 states and 644 transitions. [2022-04-06 22:20:05,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 22:20:05,740 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) Word has length 104 [2022-04-06 22:20:05,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:20:05,742 INFO L225 Difference]: With dead ends: 537 [2022-04-06 22:20:05,742 INFO L226 Difference]: Without dead ends: 535 [2022-04-06 22:20:05,743 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 189 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=73, Invalid=345, Unknown=2, NotChecked=0, Total=420 [2022-04-06 22:20:05,743 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 41 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 27 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-04-06 22:20:05,743 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 186 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 441 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2022-04-06 22:20:05,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2022-04-06 22:20:05,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 481. [2022-04-06 22:20:05,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 312 states have (on average 1.1314102564102564) internal successors, (353), 323 states have internal predecessors, (353), 106 states have call successors, (106), 63 states have call predecessors, (106), 62 states have return successors, (102), 94 states have call predecessors, (102), 102 states have call successors, (102) [2022-04-06 22:20:05,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 561 transitions. [2022-04-06 22:20:05,843 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 561 transitions. Word has length 104 [2022-04-06 22:20:05,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:20:05,844 INFO L478 AbstractCegarLoop]: Abstraction has 481 states and 561 transitions. [2022-04-06 22:20:05,844 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) [2022-04-06 22:20:05,844 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 561 transitions. [2022-04-06 22:20:05,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-04-06 22:20:05,845 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:20:05,845 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:20:05,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-04-06 22:20:06,050 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:20:06,051 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:20:06,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:20:06,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1283404789, now seen corresponding path program 31 times [2022-04-06 22:20:06,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:20:06,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1569321958] [2022-04-06 22:20:06,052 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:20:06,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1283404789, now seen corresponding path program 32 times [2022-04-06 22:20:06,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:20:06,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688281222] [2022-04-06 22:20:06,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:20:06,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:20:06,057 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:20:06,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2082310409] [2022-04-06 22:20:06,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:20:06,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:20:06,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:20:06,058 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) [2022-04-06 22:20:06,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-04-06 22:20:06,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:20:06,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:20:06,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 22:20:06,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:20:06,562 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 28 proven. 62 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2022-04-06 22:20:06,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:20:06,805 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 28 proven. 62 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2022-04-06 22:20:06,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:20:06,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688281222] [2022-04-06 22:20:06,806 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:20:06,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082310409] [2022-04-06 22:20:06,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082310409] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:20:06,806 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:20:06,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-04-06 22:20:06,806 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:20:06,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1569321958] [2022-04-06 22:20:06,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1569321958] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:20:06,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:20:06,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 22:20:06,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920710869] [2022-04-06 22:20:06,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:20:06,807 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 22:20:06,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:20:06,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 22:20:06,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-04-06 22:20:06,808 INFO L87 Difference]: Start difference. First operand 481 states and 561 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 6 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-04-06 22:20:07,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:20:07,138 INFO L93 Difference]: Finished difference Result 507 states and 602 transitions. [2022-04-06 22:20:07,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 22:20:07,139 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 6 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 109 [2022-04-06 22:20:07,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:20:07,140 INFO L225 Difference]: With dead ends: 507 [2022-04-06 22:20:07,140 INFO L226 Difference]: Without dead ends: 501 [2022-04-06 22:20:07,141 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 204 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-04-06 22:20:07,141 INFO L913 BasicCegarLoop]: 63 mSDtfsCounter, 9 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 22:20:07,141 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 292 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 22:20:07,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2022-04-06 22:20:07,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 475. [2022-04-06 22:20:07,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 309 states have (on average 1.132686084142395) internal successors, (350), 319 states have internal predecessors, (350), 104 states have call successors, (104), 62 states have call predecessors, (104), 61 states have return successors, (100), 93 states have call predecessors, (100), 100 states have call successors, (100) [2022-04-06 22:20:07,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 554 transitions. [2022-04-06 22:20:07,246 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 554 transitions. Word has length 109 [2022-04-06 22:20:07,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:20:07,246 INFO L478 AbstractCegarLoop]: Abstraction has 475 states and 554 transitions. [2022-04-06 22:20:07,246 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 6 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-04-06 22:20:07,246 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 554 transitions. [2022-04-06 22:20:07,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-04-06 22:20:07,247 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:20:07,247 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:20:07,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-04-06 22:20:07,458 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:20:07,458 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:20:07,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:20:07,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1677771575, now seen corresponding path program 33 times [2022-04-06 22:20:07,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:20:07,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [849539194] [2022-04-06 22:20:07,459 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:20:07,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1677771575, now seen corresponding path program 34 times [2022-04-06 22:20:07,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:20:07,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583602920] [2022-04-06 22:20:07,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:20:07,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:20:07,464 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:20:07,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [383311638] [2022-04-06 22:20:07,464 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 22:20:07,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:20:07,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:20:07,465 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) [2022-04-06 22:20:07,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-04-06 22:20:07,518 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 22:20:07,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:20:07,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-06 22:20:07,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:20:08,113 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 30 proven. 99 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2022-04-06 22:20:08,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:20:10,715 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 34 proven. 95 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2022-04-06 22:20:10,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:20:10,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583602920] [2022-04-06 22:20:10,715 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:20:10,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383311638] [2022-04-06 22:20:10,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383311638] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:20:10,716 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:20:10,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2022-04-06 22:20:10,716 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:20:10,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [849539194] [2022-04-06 22:20:10,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [849539194] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:20:10,716 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:20:10,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 22:20:10,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986276624] [2022-04-06 22:20:10,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:20:10,716 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 22:20:10,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:20:10,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 22:20:10,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-04-06 22:20:10,717 INFO L87 Difference]: Start difference. First operand 475 states and 554 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-04-06 22:20:11,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:20:11,341 INFO L93 Difference]: Finished difference Result 511 states and 604 transitions. [2022-04-06 22:20:11,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 22:20:11,341 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 109 [2022-04-06 22:20:11,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:20:11,343 INFO L225 Difference]: With dead ends: 511 [2022-04-06 22:20:11,343 INFO L226 Difference]: Without dead ends: 505 [2022-04-06 22:20:11,344 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 198 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2022-04-06 22:20:11,344 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 16 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 22:20:11,344 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 274 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 22:20:11,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2022-04-06 22:20:11,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 485. [2022-04-06 22:20:11,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 317 states have (on average 1.1324921135646688) internal successors, (359), 326 states have internal predecessors, (359), 104 states have call successors, (104), 64 states have call predecessors, (104), 63 states have return successors, (100), 94 states have call predecessors, (100), 100 states have call successors, (100) [2022-04-06 22:20:11,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 563 transitions. [2022-04-06 22:20:11,460 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 563 transitions. Word has length 109 [2022-04-06 22:20:11,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:20:11,460 INFO L478 AbstractCegarLoop]: Abstraction has 485 states and 563 transitions. [2022-04-06 22:20:11,460 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-04-06 22:20:11,460 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 563 transitions. [2022-04-06 22:20:11,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-04-06 22:20:11,461 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:20:11,461 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:20:11,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-04-06 22:20:11,671 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,SelfDestructingSolverStorable34 [2022-04-06 22:20:11,671 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:20:11,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:20:11,672 INFO L85 PathProgramCache]: Analyzing trace with hash 103380621, now seen corresponding path program 35 times [2022-04-06 22:20:11,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:20:11,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1683319001] [2022-04-06 22:20:11,672 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:20:11,672 INFO L85 PathProgramCache]: Analyzing trace with hash 103380621, now seen corresponding path program 36 times [2022-04-06 22:20:11,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:20:11,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546108083] [2022-04-06 22:20:11,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:20:11,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:20:11,677 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:20:11,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [596821594] [2022-04-06 22:20:11,677 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 22:20:11,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:20:11,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:20:11,678 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) [2022-04-06 22:20:11,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-04-06 22:20:12,392 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 22:20:12,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:20:12,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 22:20:12,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:20:12,645 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 121 proven. 5 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2022-04-06 22:20:12,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:20:12,872 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 121 proven. 5 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2022-04-06 22:20:12,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:20:12,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546108083] [2022-04-06 22:20:12,873 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:20:12,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596821594] [2022-04-06 22:20:12,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596821594] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:20:12,873 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:20:12,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 15 [2022-04-06 22:20:12,873 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:20:12,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1683319001] [2022-04-06 22:20:12,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1683319001] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:20:12,873 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:20:12,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 22:20:12,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51263760] [2022-04-06 22:20:12,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:20:12,874 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 22:20:12,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:20:12,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 22:20:12,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-04-06 22:20:12,874 INFO L87 Difference]: Start difference. First operand 485 states and 563 transitions. Second operand has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2022-04-06 22:20:13,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:20:13,158 INFO L93 Difference]: Finished difference Result 495 states and 571 transitions. [2022-04-06 22:20:13,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 22:20:13,158 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 109 [2022-04-06 22:20:13,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:20:13,160 INFO L225 Difference]: With dead ends: 495 [2022-04-06 22:20:13,160 INFO L226 Difference]: Without dead ends: 474 [2022-04-06 22:20:13,160 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 201 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-04-06 22:20:13,161 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 25 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 22:20:13,161 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 116 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 22:20:13,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2022-04-06 22:20:13,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 468. [2022-04-06 22:20:13,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 312 states have (on average 1.1217948717948718) internal successors, (350), 319 states have internal predecessors, (350), 93 states have call successors, (93), 63 states have call predecessors, (93), 62 states have return successors, (90), 85 states have call predecessors, (90), 90 states have call successors, (90) [2022-04-06 22:20:13,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 533 transitions. [2022-04-06 22:20:13,273 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 533 transitions. Word has length 109 [2022-04-06 22:20:13,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:20:13,273 INFO L478 AbstractCegarLoop]: Abstraction has 468 states and 533 transitions. [2022-04-06 22:20:13,273 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2022-04-06 22:20:13,273 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 533 transitions. [2022-04-06 22:20:13,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-04-06 22:20:13,274 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:20:13,274 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:20:13,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-04-06 22:20:13,480 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-04-06 22:20:13,481 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:20:13,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:20:13,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1511605586, now seen corresponding path program 9 times [2022-04-06 22:20:13,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:20:13,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [200183817] [2022-04-06 22:20:13,481 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:20:13,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1511605586, now seen corresponding path program 10 times [2022-04-06 22:20:13,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:20:13,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264787098] [2022-04-06 22:20:13,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:20:13,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:20:13,486 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:20:13,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1440120939] [2022-04-06 22:20:13,486 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 22:20:13,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:20:13,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:20:13,487 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) [2022-04-06 22:20:13,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-04-06 22:20:13,544 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 22:20:13,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:20:13,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 22:20:13,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:20:13,720 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 30 proven. 440 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-06 22:20:13,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:20:13,924 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 30 proven. 80 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2022-04-06 22:20:13,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:20:13,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264787098] [2022-04-06 22:20:13,924 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:20:13,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440120939] [2022-04-06 22:20:13,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440120939] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:20:13,925 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:20:13,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-04-06 22:20:13,925 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:20:13,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [200183817] [2022-04-06 22:20:13,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [200183817] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:20:13,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:20:13,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 22:20:13,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762114292] [2022-04-06 22:20:13,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:20:13,925 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 22:20:13,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:20:13,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 22:20:13,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-04-06 22:20:13,926 INFO L87 Difference]: Start difference. First operand 468 states and 533 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 8 states have call successors, (20), 8 states have call predecessors, (20), 6 states have return successors, (18), 6 states have call predecessors, (18), 7 states have call successors, (18) [2022-04-06 22:20:14,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:20:14,144 INFO L93 Difference]: Finished difference Result 583 states and 668 transitions. [2022-04-06 22:20:14,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 22:20:14,144 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 8 states have call successors, (20), 8 states have call predecessors, (20), 6 states have return successors, (18), 6 states have call predecessors, (18), 7 states have call successors, (18) Word has length 118 [2022-04-06 22:20:14,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:20:14,146 INFO L225 Difference]: With dead ends: 583 [2022-04-06 22:20:14,146 INFO L226 Difference]: Without dead ends: 574 [2022-04-06 22:20:14,146 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=249, Unknown=0, NotChecked=0, Total=420 [2022-04-06 22:20:14,147 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 20 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 22:20:14,147 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 162 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 22:20:14,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2022-04-06 22:20:14,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 561. [2022-04-06 22:20:14,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 377 states have (on average 1.1087533156498675) internal successors, (418), 385 states have internal predecessors, (418), 108 states have call successors, (108), 76 states have call predecessors, (108), 75 states have return successors, (105), 99 states have call predecessors, (105), 105 states have call successors, (105) [2022-04-06 22:20:14,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 631 transitions. [2022-04-06 22:20:14,284 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 631 transitions. Word has length 118 [2022-04-06 22:20:14,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:20:14,284 INFO L478 AbstractCegarLoop]: Abstraction has 561 states and 631 transitions. [2022-04-06 22:20:14,284 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 8 states have call successors, (20), 8 states have call predecessors, (20), 6 states have return successors, (18), 6 states have call predecessors, (18), 7 states have call successors, (18) [2022-04-06 22:20:14,285 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 631 transitions. [2022-04-06 22:20:14,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-04-06 22:20:14,286 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:20:14,286 INFO L499 BasicCegarLoop]: trace histogram [19, 18, 18, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:20:14,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-04-06 22:20:14,495 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,SelfDestructingSolverStorable36 [2022-04-06 22:20:14,495 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:20:14,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:20:14,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1126498815, now seen corresponding path program 11 times [2022-04-06 22:20:14,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:20:14,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [791954289] [2022-04-06 22:20:14,496 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:20:14,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1126498815, now seen corresponding path program 12 times [2022-04-06 22:20:14,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:20:14,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251952644] [2022-04-06 22:20:14,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:20:14,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:20:14,501 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:20:14,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [566273159] [2022-04-06 22:20:14,501 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 22:20:14,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:20:14,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:20:14,502 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) [2022-04-06 22:20:14,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-04-06 22:20:14,568 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-04-06 22:20:14,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:20:14,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-06 22:20:14,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:20:14,760 INFO L134 CoverageAnalysis]: Checked inductivity of 769 backedges. 36 proven. 657 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-04-06 22:20:14,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:20:14,996 INFO L134 CoverageAnalysis]: Checked inductivity of 769 backedges. 36 proven. 117 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-04-06 22:20:14,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:20:14,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251952644] [2022-04-06 22:20:14,996 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:20:14,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566273159] [2022-04-06 22:20:14,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566273159] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:20:14,997 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:20:14,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-04-06 22:20:14,997 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:20:14,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [791954289] [2022-04-06 22:20:14,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [791954289] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:20:14,997 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:20:14,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 22:20:14,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844062231] [2022-04-06 22:20:14,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:20:14,997 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 22:20:14,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:20:14,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 22:20:14,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-04-06 22:20:14,998 INFO L87 Difference]: Start difference. First operand 561 states and 631 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 9 states have call successors, (23), 9 states have call predecessors, (23), 7 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) [2022-04-06 22:20:15,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:20:15,256 INFO L93 Difference]: Finished difference Result 690 states and 792 transitions. [2022-04-06 22:20:15,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 22:20:15,257 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 9 states have call successors, (23), 9 states have call predecessors, (23), 7 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) Word has length 137 [2022-04-06 22:20:15,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:20:15,259 INFO L225 Difference]: With dead ends: 690 [2022-04-06 22:20:15,259 INFO L226 Difference]: Without dead ends: 681 [2022-04-06 22:20:15,259 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=227, Invalid=325, Unknown=0, NotChecked=0, Total=552 [2022-04-06 22:20:15,260 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 22 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 22:20:15,260 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 164 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 22:20:15,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2022-04-06 22:20:15,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 679. [2022-04-06 22:20:15,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 679 states, 453 states have (on average 1.1059602649006623) internal successors, (501), 464 states have internal predecessors, (501), 136 states have call successors, (136), 90 states have call predecessors, (136), 89 states have return successors, (133), 124 states have call predecessors, (133), 133 states have call successors, (133) [2022-04-06 22:20:15,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 770 transitions. [2022-04-06 22:20:15,424 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 770 transitions. Word has length 137 [2022-04-06 22:20:15,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:20:15,424 INFO L478 AbstractCegarLoop]: Abstraction has 679 states and 770 transitions. [2022-04-06 22:20:15,424 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 9 states have call successors, (23), 9 states have call predecessors, (23), 7 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) [2022-04-06 22:20:15,424 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 770 transitions. [2022-04-06 22:20:15,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-04-06 22:20:15,426 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:20:15,426 INFO L499 BasicCegarLoop]: trace histogram [22, 21, 21, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:20:15,442 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-04-06 22:20:15,642 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:20:15,642 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:20:15,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:20:15,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1647300850, now seen corresponding path program 13 times [2022-04-06 22:20:15,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:20:15,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1313326700] [2022-04-06 22:20:15,643 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:20:15,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1647300850, now seen corresponding path program 14 times [2022-04-06 22:20:15,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:20:15,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365250785] [2022-04-06 22:20:15,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:20:15,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:20:15,648 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:20:15,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1216816780] [2022-04-06 22:20:15,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:20:15,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:20:15,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:20:15,654 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) [2022-04-06 22:20:15,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-04-06 22:20:15,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:20:15,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:20:15,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 22:20:15,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:20:15,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1047 backedges. 42 proven. 917 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-04-06 22:20:15,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:20:16,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1047 backedges. 42 proven. 161 refuted. 0 times theorem prover too weak. 844 trivial. 0 not checked. [2022-04-06 22:20:16,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:20:16,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365250785] [2022-04-06 22:20:16,189 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:20:16,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216816780] [2022-04-06 22:20:16,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216816780] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:20:16,189 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:20:16,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-04-06 22:20:16,189 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:20:16,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1313326700] [2022-04-06 22:20:16,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1313326700] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:20:16,189 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:20:16,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 22:20:16,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704699089] [2022-04-06 22:20:16,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:20:16,190 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 22:20:16,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:20:16,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 22:20:16,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-04-06 22:20:16,190 INFO L87 Difference]: Start difference. First operand 679 states and 770 transitions. Second operand has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 10 states have call successors, (26), 10 states have call predecessors, (26), 8 states have return successors, (24), 8 states have call predecessors, (24), 9 states have call successors, (24) [2022-04-06 22:20:16,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:20:16,484 INFO L93 Difference]: Finished difference Result 808 states and 931 transitions. [2022-04-06 22:20:16,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 22:20:16,485 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 10 states have call successors, (26), 10 states have call predecessors, (26), 8 states have return successors, (24), 8 states have call predecessors, (24), 9 states have call successors, (24) Word has length 156 [2022-04-06 22:20:16,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:20:16,487 INFO L225 Difference]: With dead ends: 808 [2022-04-06 22:20:16,487 INFO L226 Difference]: Without dead ends: 799 [2022-04-06 22:20:16,488 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 293 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=291, Invalid=411, Unknown=0, NotChecked=0, Total=702 [2022-04-06 22:20:16,488 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 22 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 22:20:16,488 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 196 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 22:20:16,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2022-04-06 22:20:16,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 797. [2022-04-06 22:20:16,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 797 states, 529 states have (on average 1.1039697542533082) internal successors, (584), 543 states have internal predecessors, (584), 164 states have call successors, (164), 104 states have call predecessors, (164), 103 states have return successors, (161), 149 states have call predecessors, (161), 161 states have call successors, (161) [2022-04-06 22:20:16,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 797 states to 797 states and 909 transitions. [2022-04-06 22:20:16,684 INFO L78 Accepts]: Start accepts. Automaton has 797 states and 909 transitions. Word has length 156 [2022-04-06 22:20:16,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:20:16,685 INFO L478 AbstractCegarLoop]: Abstraction has 797 states and 909 transitions. [2022-04-06 22:20:16,685 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 10 states have call successors, (26), 10 states have call predecessors, (26), 8 states have return successors, (24), 8 states have call predecessors, (24), 9 states have call successors, (24) [2022-04-06 22:20:16,685 INFO L276 IsEmpty]: Start isEmpty. Operand 797 states and 909 transitions. [2022-04-06 22:20:16,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-04-06 22:20:16,686 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:20:16,686 INFO L499 BasicCegarLoop]: trace histogram [25, 24, 24, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:20:16,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-04-06 22:20:16,899 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,SelfDestructingSolverStorable38 [2022-04-06 22:20:16,899 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:20:16,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:20:16,900 INFO L85 PathProgramCache]: Analyzing trace with hash -980382111, now seen corresponding path program 15 times [2022-04-06 22:20:16,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:20:16,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [887461272] [2022-04-06 22:20:16,900 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:20:16,900 INFO L85 PathProgramCache]: Analyzing trace with hash -980382111, now seen corresponding path program 16 times [2022-04-06 22:20:16,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:20:16,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68759622] [2022-04-06 22:20:16,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:20:16,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:20:16,905 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:20:16,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1373770831] [2022-04-06 22:20:16,906 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 22:20:16,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:20:16,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:20:16,907 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) [2022-04-06 22:20:16,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-04-06 22:20:16,971 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 22:20:16,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:20:16,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-06 22:20:16,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:20:17,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1368 backedges. 48 proven. 1220 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-04-06 22:20:17,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:20:17,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1368 backedges. 48 proven. 212 refuted. 0 times theorem prover too weak. 1108 trivial. 0 not checked. [2022-04-06 22:20:17,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:20:17,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68759622] [2022-04-06 22:20:17,519 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:20:17,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373770831] [2022-04-06 22:20:17,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373770831] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:20:17,519 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:20:17,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2022-04-06 22:20:17,519 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:20:17,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [887461272] [2022-04-06 22:20:17,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [887461272] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:20:17,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:20:17,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 22:20:17,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018305488] [2022-04-06 22:20:17,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:20:17,520 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 22:20:17,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:20:17,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 22:20:17,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-04-06 22:20:17,521 INFO L87 Difference]: Start difference. First operand 797 states and 909 transitions. Second operand has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 11 states have call successors, (29), 11 states have call predecessors, (29), 9 states have return successors, (27), 9 states have call predecessors, (27), 10 states have call successors, (27) [2022-04-06 22:20:17,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:20:17,867 INFO L93 Difference]: Finished difference Result 926 states and 1070 transitions. [2022-04-06 22:20:17,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 22:20:17,868 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 11 states have call successors, (29), 11 states have call predecessors, (29), 9 states have return successors, (27), 9 states have call predecessors, (27), 10 states have call successors, (27) Word has length 175 [2022-04-06 22:20:17,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:20:17,871 INFO L225 Difference]: With dead ends: 926 [2022-04-06 22:20:17,871 INFO L226 Difference]: Without dead ends: 917 [2022-04-06 22:20:17,871 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=363, Invalid=507, Unknown=0, NotChecked=0, Total=870 [2022-04-06 22:20:17,871 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 20 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 22:20:17,872 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 198 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 22:20:17,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 917 states. [2022-04-06 22:20:18,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 917 to 915. [2022-04-06 22:20:18,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 915 states, 605 states have (on average 1.1024793388429752) internal successors, (667), 622 states have internal predecessors, (667), 192 states have call successors, (192), 118 states have call predecessors, (192), 117 states have return successors, (189), 174 states have call predecessors, (189), 189 states have call successors, (189) [2022-04-06 22:20:18,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 915 states to 915 states and 1048 transitions. [2022-04-06 22:20:18,099 INFO L78 Accepts]: Start accepts. Automaton has 915 states and 1048 transitions. Word has length 175 [2022-04-06 22:20:18,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:20:18,099 INFO L478 AbstractCegarLoop]: Abstraction has 915 states and 1048 transitions. [2022-04-06 22:20:18,100 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 11 states have call successors, (29), 11 states have call predecessors, (29), 9 states have return successors, (27), 9 states have call predecessors, (27), 10 states have call successors, (27) [2022-04-06 22:20:18,100 INFO L276 IsEmpty]: Start isEmpty. Operand 915 states and 1048 transitions. [2022-04-06 22:20:18,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-04-06 22:20:18,102 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:20:18,102 INFO L499 BasicCegarLoop]: trace histogram [28, 27, 27, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:20:18,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-04-06 22:20:18,313 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,SelfDestructingSolverStorable39 [2022-04-06 22:20:18,313 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:20:18,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:20:18,314 INFO L85 PathProgramCache]: Analyzing trace with hash -794778478, now seen corresponding path program 17 times [2022-04-06 22:20:18,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:20:18,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [575195227] [2022-04-06 22:20:18,314 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:20:18,314 INFO L85 PathProgramCache]: Analyzing trace with hash -794778478, now seen corresponding path program 18 times [2022-04-06 22:20:18,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:20:18,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876362136] [2022-04-06 22:20:18,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:20:18,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:20:18,320 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:20:18,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [568334819] [2022-04-06 22:20:18,320 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 22:20:18,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:20:18,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:20:18,334 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) [2022-04-06 22:20:18,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-04-06 22:20:18,469 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-04-06 22:20:18,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:20:18,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 22:20:18,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:20:18,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1732 backedges. 54 proven. 1566 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 22:20:18,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:20:19,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1732 backedges. 54 proven. 270 refuted. 0 times theorem prover too weak. 1408 trivial. 0 not checked. [2022-04-06 22:20:19,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:20:19,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876362136] [2022-04-06 22:20:19,110 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:20:19,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568334819] [2022-04-06 22:20:19,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568334819] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:20:19,110 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:20:19,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-04-06 22:20:19,110 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:20:19,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [575195227] [2022-04-06 22:20:19,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [575195227] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:20:19,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:20:19,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 22:20:19,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766153338] [2022-04-06 22:20:19,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:20:19,111 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 22:20:19,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:20:19,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 22:20:19,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-04-06 22:20:19,111 INFO L87 Difference]: Start difference. First operand 915 states and 1048 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 states have internal predecessors, (75), 12 states have call successors, (32), 12 states have call predecessors, (32), 10 states have return successors, (30), 10 states have call predecessors, (30), 11 states have call successors, (30) [2022-04-06 22:20:19,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:20:19,496 INFO L93 Difference]: Finished difference Result 1044 states and 1209 transitions. [2022-04-06 22:20:19,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 22:20:19,497 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 states have internal predecessors, (75), 12 states have call successors, (32), 12 states have call predecessors, (32), 10 states have return successors, (30), 10 states have call predecessors, (30), 11 states have call successors, (30) Word has length 194 [2022-04-06 22:20:19,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:20:19,500 INFO L225 Difference]: With dead ends: 1044 [2022-04-06 22:20:19,500 INFO L226 Difference]: Without dead ends: 1035 [2022-04-06 22:20:19,500 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 365 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=443, Invalid=613, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 22:20:19,501 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 25 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 22:20:19,501 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 210 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 22:20:19,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1035 states. [2022-04-06 22:20:19,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1035 to 1033. [2022-04-06 22:20:19,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1033 states, 681 states have (on average 1.1013215859030836) internal successors, (750), 701 states have internal predecessors, (750), 220 states have call successors, (220), 132 states have call predecessors, (220), 131 states have return successors, (217), 199 states have call predecessors, (217), 217 states have call successors, (217) [2022-04-06 22:20:19,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 1187 transitions. [2022-04-06 22:20:19,771 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 1187 transitions. Word has length 194 [2022-04-06 22:20:19,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:20:19,771 INFO L478 AbstractCegarLoop]: Abstraction has 1033 states and 1187 transitions. [2022-04-06 22:20:19,775 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 states have internal predecessors, (75), 12 states have call successors, (32), 12 states have call predecessors, (32), 10 states have return successors, (30), 10 states have call predecessors, (30), 11 states have call successors, (30) [2022-04-06 22:20:19,775 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 1187 transitions. [2022-04-06 22:20:19,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-04-06 22:20:19,777 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:20:19,777 INFO L499 BasicCegarLoop]: trace histogram [31, 30, 30, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:20:19,782 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-04-06 22:20:19,982 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:20:19,982 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:20:19,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:20:19,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1980311871, now seen corresponding path program 19 times [2022-04-06 22:20:19,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:20:19,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1697499760] [2022-04-06 22:20:19,983 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:20:19,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1980311871, now seen corresponding path program 20 times [2022-04-06 22:20:19,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:20:19,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027887792] [2022-04-06 22:20:19,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:20:19,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:20:19,990 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:20:19,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1335181735] [2022-04-06 22:20:19,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:20:19,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:20:19,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:20:19,991 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) [2022-04-06 22:20:19,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-04-06 22:20:20,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:20:20,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:20:20,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-06 22:20:20,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:20:20,384 INFO L134 CoverageAnalysis]: Checked inductivity of 2139 backedges. 60 proven. 1955 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-04-06 22:20:20,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:20:20,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2139 backedges. 60 proven. 335 refuted. 0 times theorem prover too weak. 1744 trivial. 0 not checked. [2022-04-06 22:20:20,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:20:20,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027887792] [2022-04-06 22:20:20,765 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:20:20,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335181735] [2022-04-06 22:20:20,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335181735] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:20:20,765 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:20:20,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-04-06 22:20:20,766 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:20:20,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1697499760] [2022-04-06 22:20:20,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1697499760] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:20:20,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:20:20,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 22:20:20,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278479120] [2022-04-06 22:20:20,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:20:20,766 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 22:20:20,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:20:20,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 22:20:20,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-04-06 22:20:20,767 INFO L87 Difference]: Start difference. First operand 1033 states and 1187 transitions. Second operand has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 13 states have internal predecessors, (82), 13 states have call successors, (35), 13 states have call predecessors, (35), 11 states have return successors, (33), 11 states have call predecessors, (33), 12 states have call successors, (33) [2022-04-06 22:20:21,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:20:21,281 INFO L93 Difference]: Finished difference Result 1162 states and 1348 transitions. [2022-04-06 22:20:21,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 22:20:21,282 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 13 states have internal predecessors, (82), 13 states have call successors, (35), 13 states have call predecessors, (35), 11 states have return successors, (33), 11 states have call predecessors, (33), 12 states have call successors, (33) Word has length 213 [2022-04-06 22:20:21,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:20:21,285 INFO L225 Difference]: With dead ends: 1162 [2022-04-06 22:20:21,285 INFO L226 Difference]: Without dead ends: 1153 [2022-04-06 22:20:21,286 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 401 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=531, Invalid=729, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 22:20:21,286 INFO L913 BasicCegarLoop]: 62 mSDtfsCounter, 36 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 22:20:21,286 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 232 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 22:20:21,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2022-04-06 22:20:21,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 1151. [2022-04-06 22:20:21,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1151 states, 757 states have (on average 1.1003963011889035) internal successors, (833), 780 states have internal predecessors, (833), 248 states have call successors, (248), 146 states have call predecessors, (248), 145 states have return successors, (245), 224 states have call predecessors, (245), 245 states have call successors, (245) [2022-04-06 22:20:21,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1151 states to 1151 states and 1326 transitions. [2022-04-06 22:20:21,584 INFO L78 Accepts]: Start accepts. Automaton has 1151 states and 1326 transitions. Word has length 213 [2022-04-06 22:20:21,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:20:21,584 INFO L478 AbstractCegarLoop]: Abstraction has 1151 states and 1326 transitions. [2022-04-06 22:20:21,584 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 13 states have internal predecessors, (82), 13 states have call successors, (35), 13 states have call predecessors, (35), 11 states have return successors, (33), 11 states have call predecessors, (33), 12 states have call successors, (33) [2022-04-06 22:20:21,584 INFO L276 IsEmpty]: Start isEmpty. Operand 1151 states and 1326 transitions. [2022-04-06 22:20:21,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2022-04-06 22:20:21,586 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:20:21,586 INFO L499 BasicCegarLoop]: trace histogram [34, 33, 33, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:20:21,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-04-06 22:20:21,787 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,SelfDestructingSolverStorable41 [2022-04-06 22:20:21,787 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:20:21,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:20:21,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1467334706, now seen corresponding path program 21 times [2022-04-06 22:20:21,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:20:21,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [366757719] [2022-04-06 22:20:21,788 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:20:21,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1467334706, now seen corresponding path program 22 times [2022-04-06 22:20:21,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:20:21,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302647246] [2022-04-06 22:20:21,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:20:21,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:20:21,795 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:20:21,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [459694511] [2022-04-06 22:20:21,795 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 22:20:21,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:20:21,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:20:21,796 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) [2022-04-06 22:20:21,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-04-06 22:20:21,877 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 22:20:21,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:20:21,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-06 22:20:21,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:20:22,256 INFO L134 CoverageAnalysis]: Checked inductivity of 2589 backedges. 66 proven. 2387 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-04-06 22:20:22,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:20:22,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2589 backedges. 66 proven. 407 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2022-04-06 22:20:22,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:20:22,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302647246] [2022-04-06 22:20:22,687 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:20:22,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459694511] [2022-04-06 22:20:22,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459694511] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:20:22,687 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:20:22,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2022-04-06 22:20:22,687 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:20:22,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [366757719] [2022-04-06 22:20:22,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [366757719] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:20:22,687 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:20:22,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 22:20:22,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975809053] [2022-04-06 22:20:22,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:20:22,688 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 22:20:22,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:20:22,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 22:20:22,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-04-06 22:20:22,688 INFO L87 Difference]: Start difference. First operand 1151 states and 1326 transitions. Second operand has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 14 states have internal predecessors, (89), 14 states have call successors, (38), 14 states have call predecessors, (38), 12 states have return successors, (36), 12 states have call predecessors, (36), 13 states have call successors, (36) [2022-04-06 22:20:23,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:20:23,202 INFO L93 Difference]: Finished difference Result 1280 states and 1487 transitions. [2022-04-06 22:20:23,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-06 22:20:23,203 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 14 states have internal predecessors, (89), 14 states have call successors, (38), 14 states have call predecessors, (38), 12 states have return successors, (36), 12 states have call predecessors, (36), 13 states have call successors, (36) Word has length 232 [2022-04-06 22:20:23,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:20:23,207 INFO L225 Difference]: With dead ends: 1280 [2022-04-06 22:20:23,207 INFO L226 Difference]: Without dead ends: 1271 [2022-04-06 22:20:23,208 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 437 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=627, Invalid=855, Unknown=0, NotChecked=0, Total=1482 [2022-04-06 22:20:23,208 INFO L913 BasicCegarLoop]: 65 mSDtfsCounter, 47 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 22:20:23,208 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 224 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 22:20:23,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1271 states. [2022-04-06 22:20:23,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1271 to 1269. [2022-04-06 22:20:23,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1269 states, 833 states have (on average 1.099639855942377) internal successors, (916), 859 states have internal predecessors, (916), 276 states have call successors, (276), 160 states have call predecessors, (276), 159 states have return successors, (273), 249 states have call predecessors, (273), 273 states have call successors, (273) [2022-04-06 22:20:23,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1269 states to 1269 states and 1465 transitions. [2022-04-06 22:20:23,532 INFO L78 Accepts]: Start accepts. Automaton has 1269 states and 1465 transitions. Word has length 232 [2022-04-06 22:20:23,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:20:23,533 INFO L478 AbstractCegarLoop]: Abstraction has 1269 states and 1465 transitions. [2022-04-06 22:20:23,533 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 14 states have internal predecessors, (89), 14 states have call successors, (38), 14 states have call predecessors, (38), 12 states have return successors, (36), 12 states have call predecessors, (36), 13 states have call successors, (36) [2022-04-06 22:20:23,533 INFO L276 IsEmpty]: Start isEmpty. Operand 1269 states and 1465 transitions. [2022-04-06 22:20:23,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2022-04-06 22:20:23,535 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:20:23,535 INFO L499 BasicCegarLoop]: trace histogram [37, 36, 36, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:20:23,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-04-06 22:20:23,751 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:20:23,751 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:20:23,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:20:23,752 INFO L85 PathProgramCache]: Analyzing trace with hash 2009323297, now seen corresponding path program 23 times [2022-04-06 22:20:23,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:20:23,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1744143733] [2022-04-06 22:20:23,752 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:20:23,752 INFO L85 PathProgramCache]: Analyzing trace with hash 2009323297, now seen corresponding path program 24 times [2022-04-06 22:20:23,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:20:23,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165176920] [2022-04-06 22:20:23,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:20:23,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:20:23,759 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:20:23,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [10305355] [2022-04-06 22:20:23,759 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 22:20:23,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:20:23,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:20:23,760 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) [2022-04-06 22:20:23,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-04-06 22:20:23,879 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2022-04-06 22:20:23,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:20:23,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 29 conjunts are in the unsatisfiable core [2022-04-06 22:20:23,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:20:24,303 INFO L134 CoverageAnalysis]: Checked inductivity of 3082 backedges. 72 proven. 2862 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-04-06 22:20:24,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:20:24,782 INFO L134 CoverageAnalysis]: Checked inductivity of 3082 backedges. 72 proven. 486 refuted. 0 times theorem prover too weak. 2524 trivial. 0 not checked. [2022-04-06 22:20:24,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:20:24,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165176920] [2022-04-06 22:20:24,782 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:20:24,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10305355] [2022-04-06 22:20:24,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10305355] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:20:24,782 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:20:24,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2022-04-06 22:20:24,783 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:20:24,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1744143733] [2022-04-06 22:20:24,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1744143733] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:20:24,783 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:20:24,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 22:20:24,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190493912] [2022-04-06 22:20:24,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:20:24,783 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 22:20:24,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:20:24,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 22:20:24,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-04-06 22:20:24,784 INFO L87 Difference]: Start difference. First operand 1269 states and 1465 transitions. Second operand has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 15 states have call successors, (41), 15 states have call predecessors, (41), 13 states have return successors, (39), 13 states have call predecessors, (39), 14 states have call successors, (39) [2022-04-06 22:20:25,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:20:25,326 INFO L93 Difference]: Finished difference Result 1398 states and 1626 transitions. [2022-04-06 22:20:25,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-06 22:20:25,327 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 15 states have call successors, (41), 15 states have call predecessors, (41), 13 states have return successors, (39), 13 states have call predecessors, (39), 14 states have call successors, (39) Word has length 251 [2022-04-06 22:20:25,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:20:25,330 INFO L225 Difference]: With dead ends: 1398 [2022-04-06 22:20:25,331 INFO L226 Difference]: Without dead ends: 1389 [2022-04-06 22:20:25,332 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 473 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=731, Invalid=991, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 22:20:25,332 INFO L913 BasicCegarLoop]: 68 mSDtfsCounter, 34 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 22:20:25,333 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 256 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 22:20:25,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1389 states. [2022-04-06 22:20:25,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1389 to 1387. [2022-04-06 22:20:25,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1387 states, 909 states have (on average 1.099009900990099) internal successors, (999), 938 states have internal predecessors, (999), 304 states have call successors, (304), 174 states have call predecessors, (304), 173 states have return successors, (301), 274 states have call predecessors, (301), 301 states have call successors, (301) [2022-04-06 22:20:25,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1387 states to 1387 states and 1604 transitions. [2022-04-06 22:20:25,679 INFO L78 Accepts]: Start accepts. Automaton has 1387 states and 1604 transitions. Word has length 251 [2022-04-06 22:20:25,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:20:25,680 INFO L478 AbstractCegarLoop]: Abstraction has 1387 states and 1604 transitions. [2022-04-06 22:20:25,680 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 15 states have call successors, (41), 15 states have call predecessors, (41), 13 states have return successors, (39), 13 states have call predecessors, (39), 14 states have call successors, (39) [2022-04-06 22:20:25,680 INFO L276 IsEmpty]: Start isEmpty. Operand 1387 states and 1604 transitions. [2022-04-06 22:20:25,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2022-04-06 22:20:25,682 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:20:25,682 INFO L499 BasicCegarLoop]: trace histogram [40, 39, 39, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:20:25,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-04-06 22:20:25,891 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:20:25,891 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:20:25,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:20:25,892 INFO L85 PathProgramCache]: Analyzing trace with hash -784784430, now seen corresponding path program 25 times [2022-04-06 22:20:25,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:20:25,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1115626782] [2022-04-06 22:20:25,895 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:20:25,895 INFO L85 PathProgramCache]: Analyzing trace with hash -784784430, now seen corresponding path program 26 times [2022-04-06 22:20:25,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:20:25,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636865225] [2022-04-06 22:20:25,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:20:25,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:20:25,903 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:20:25,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1358855010] [2022-04-06 22:20:25,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:20:25,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:20:25,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:20:25,904 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) [2022-04-06 22:20:25,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-04-06 22:20:25,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:20:25,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:20:25,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 31 conjunts are in the unsatisfiable core [2022-04-06 22:20:26,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:20:26,437 INFO L134 CoverageAnalysis]: Checked inductivity of 3618 backedges. 78 proven. 3380 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2022-04-06 22:20:26,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:20:26,975 INFO L134 CoverageAnalysis]: Checked inductivity of 3618 backedges. 78 proven. 572 refuted. 0 times theorem prover too weak. 2968 trivial. 0 not checked. [2022-04-06 22:20:26,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:20:26,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636865225] [2022-04-06 22:20:26,975 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:20:26,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358855010] [2022-04-06 22:20:26,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358855010] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:20:26,976 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:20:26,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2022-04-06 22:20:26,976 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:20:26,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1115626782] [2022-04-06 22:20:26,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1115626782] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:20:26,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:20:26,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 22:20:26,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002433227] [2022-04-06 22:20:26,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:20:26,977 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 22:20:26,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:20:26,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 22:20:26,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-04-06 22:20:26,977 INFO L87 Difference]: Start difference. First operand 1387 states and 1604 transitions. Second operand has 17 states, 17 states have (on average 6.0588235294117645) internal successors, (103), 16 states have internal predecessors, (103), 16 states have call successors, (44), 16 states have call predecessors, (44), 14 states have return successors, (42), 14 states have call predecessors, (42), 15 states have call successors, (42) [2022-04-06 22:20:27,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:20:27,580 INFO L93 Difference]: Finished difference Result 1516 states and 1765 transitions. [2022-04-06 22:20:27,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-06 22:20:27,581 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 6.0588235294117645) internal successors, (103), 16 states have internal predecessors, (103), 16 states have call successors, (44), 16 states have call predecessors, (44), 14 states have return successors, (42), 14 states have call predecessors, (42), 15 states have call successors, (42) Word has length 270 [2022-04-06 22:20:27,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:20:27,585 INFO L225 Difference]: With dead ends: 1516 [2022-04-06 22:20:27,585 INFO L226 Difference]: Without dead ends: 1507 [2022-04-06 22:20:27,586 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 552 GetRequests, 509 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=843, Invalid=1137, Unknown=0, NotChecked=0, Total=1980 [2022-04-06 22:20:27,586 INFO L913 BasicCegarLoop]: 71 mSDtfsCounter, 43 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 22:20:27,586 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 248 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 22:20:27,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1507 states. [2022-04-06 22:20:27,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1507 to 1505. [2022-04-06 22:20:27,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1505 states, 985 states have (on average 1.0984771573604062) internal successors, (1082), 1017 states have internal predecessors, (1082), 332 states have call successors, (332), 188 states have call predecessors, (332), 187 states have return successors, (329), 299 states have call predecessors, (329), 329 states have call successors, (329) [2022-04-06 22:20:27,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1505 states to 1505 states and 1743 transitions. [2022-04-06 22:20:27,963 INFO L78 Accepts]: Start accepts. Automaton has 1505 states and 1743 transitions. Word has length 270 [2022-04-06 22:20:27,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:20:27,963 INFO L478 AbstractCegarLoop]: Abstraction has 1505 states and 1743 transitions. [2022-04-06 22:20:27,963 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.0588235294117645) internal successors, (103), 16 states have internal predecessors, (103), 16 states have call successors, (44), 16 states have call predecessors, (44), 14 states have return successors, (42), 14 states have call predecessors, (42), 15 states have call successors, (42) [2022-04-06 22:20:27,963 INFO L276 IsEmpty]: Start isEmpty. Operand 1505 states and 1743 transitions. [2022-04-06 22:20:27,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2022-04-06 22:20:27,966 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:20:27,966 INFO L499 BasicCegarLoop]: trace histogram [43, 42, 42, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:20:27,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-04-06 22:20:28,173 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,SelfDestructingSolverStorable44 [2022-04-06 22:20:28,174 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:20:28,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:20:28,174 INFO L85 PathProgramCache]: Analyzing trace with hash 70094721, now seen corresponding path program 27 times [2022-04-06 22:20:28,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:20:28,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2008291363] [2022-04-06 22:20:28,175 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:20:28,175 INFO L85 PathProgramCache]: Analyzing trace with hash 70094721, now seen corresponding path program 28 times [2022-04-06 22:20:28,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:20:28,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023140900] [2022-04-06 22:20:28,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:20:28,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:20:28,181 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:20:28,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1532602511] [2022-04-06 22:20:28,182 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 22:20:28,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:20:28,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:20:28,184 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) [2022-04-06 22:20:28,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-04-06 22:20:28,285 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 22:20:28,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:20:28,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 33 conjunts are in the unsatisfiable core [2022-04-06 22:20:28,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:20:28,779 INFO L134 CoverageAnalysis]: Checked inductivity of 4197 backedges. 84 proven. 3941 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-04-06 22:20:28,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:20:29,357 INFO L134 CoverageAnalysis]: Checked inductivity of 4197 backedges. 84 proven. 665 refuted. 0 times theorem prover too weak. 3448 trivial. 0 not checked. [2022-04-06 22:20:29,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:20:29,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023140900] [2022-04-06 22:20:29,357 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:20:29,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532602511] [2022-04-06 22:20:29,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532602511] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:20:29,357 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:20:29,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2022-04-06 22:20:29,358 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:20:29,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2008291363] [2022-04-06 22:20:29,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2008291363] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:20:29,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:20:29,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 22:20:29,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54980961] [2022-04-06 22:20:29,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:20:29,358 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 22:20:29,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:20:29,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 22:20:29,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 22:20:29,359 INFO L87 Difference]: Start difference. First operand 1505 states and 1743 transitions. Second operand has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 17 states have internal predecessors, (110), 17 states have call successors, (47), 17 states have call predecessors, (47), 15 states have return successors, (45), 15 states have call predecessors, (45), 16 states have call successors, (45) [2022-04-06 22:20:30,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:20:30,027 INFO L93 Difference]: Finished difference Result 1634 states and 1904 transitions. [2022-04-06 22:20:30,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-06 22:20:30,028 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 17 states have internal predecessors, (110), 17 states have call successors, (47), 17 states have call predecessors, (47), 15 states have return successors, (45), 15 states have call predecessors, (45), 16 states have call successors, (45) Word has length 289 [2022-04-06 22:20:30,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:20:30,033 INFO L225 Difference]: With dead ends: 1634 [2022-04-06 22:20:30,034 INFO L226 Difference]: Without dead ends: 1625 [2022-04-06 22:20:30,035 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 591 GetRequests, 545 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=963, Invalid=1293, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 22:20:30,035 INFO L913 BasicCegarLoop]: 74 mSDtfsCounter, 58 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 22:20:30,035 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 260 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 22:20:30,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1625 states. [2022-04-06 22:20:30,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1625 to 1623. [2022-04-06 22:20:30,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1623 states, 1061 states have (on average 1.0980207351555136) internal successors, (1165), 1096 states have internal predecessors, (1165), 360 states have call successors, (360), 202 states have call predecessors, (360), 201 states have return successors, (357), 324 states have call predecessors, (357), 357 states have call successors, (357) [2022-04-06 22:20:30,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1623 states to 1623 states and 1882 transitions. [2022-04-06 22:20:30,453 INFO L78 Accepts]: Start accepts. Automaton has 1623 states and 1882 transitions. Word has length 289 [2022-04-06 22:20:30,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:20:30,454 INFO L478 AbstractCegarLoop]: Abstraction has 1623 states and 1882 transitions. [2022-04-06 22:20:30,454 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 17 states have internal predecessors, (110), 17 states have call successors, (47), 17 states have call predecessors, (47), 15 states have return successors, (45), 15 states have call predecessors, (45), 16 states have call successors, (45) [2022-04-06 22:20:30,454 INFO L276 IsEmpty]: Start isEmpty. Operand 1623 states and 1882 transitions. [2022-04-06 22:20:30,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2022-04-06 22:20:30,457 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:20:30,457 INFO L499 BasicCegarLoop]: trace histogram [46, 45, 45, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:20:30,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-04-06 22:20:30,683 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-04-06 22:20:30,683 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:20:30,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:20:30,684 INFO L85 PathProgramCache]: Analyzing trace with hash -520827022, now seen corresponding path program 29 times [2022-04-06 22:20:30,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:20:30,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1797735031] [2022-04-06 22:20:30,684 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:20:30,684 INFO L85 PathProgramCache]: Analyzing trace with hash -520827022, now seen corresponding path program 30 times [2022-04-06 22:20:30,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:20:30,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822137416] [2022-04-06 22:20:30,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:20:30,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:20:30,693 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:20:30,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2048927799] [2022-04-06 22:20:30,694 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 22:20:30,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:20:30,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:20:30,697 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) [2022-04-06 22:20:30,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-04-06 22:20:30,876 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 30 check-sat command(s) [2022-04-06 22:20:30,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:20:30,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 699 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-06 22:20:30,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:20:31,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4819 backedges. 90 proven. 4545 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-04-06 22:20:31,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:20:31,982 INFO L134 CoverageAnalysis]: Checked inductivity of 4819 backedges. 90 proven. 765 refuted. 0 times theorem prover too weak. 3964 trivial. 0 not checked. [2022-04-06 22:20:31,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:20:31,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822137416] [2022-04-06 22:20:31,982 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:20:31,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048927799] [2022-04-06 22:20:31,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048927799] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:20:31,982 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:20:31,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2022-04-06 22:20:31,983 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:20:31,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1797735031] [2022-04-06 22:20:31,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1797735031] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:20:31,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:20:31,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 22:20:31,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268455728] [2022-04-06 22:20:31,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:20:31,983 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 22:20:31,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:20:31,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 22:20:31,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 22:20:31,984 INFO L87 Difference]: Start difference. First operand 1623 states and 1882 transitions. Second operand has 19 states, 19 states have (on average 6.157894736842105) internal successors, (117), 18 states have internal predecessors, (117), 18 states have call successors, (50), 18 states have call predecessors, (50), 16 states have return successors, (48), 16 states have call predecessors, (48), 17 states have call successors, (48) [2022-04-06 22:20:32,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:20:32,684 INFO L93 Difference]: Finished difference Result 1752 states and 2043 transitions. [2022-04-06 22:20:32,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-06 22:20:32,685 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 6.157894736842105) internal successors, (117), 18 states have internal predecessors, (117), 18 states have call successors, (50), 18 states have call predecessors, (50), 16 states have return successors, (48), 16 states have call predecessors, (48), 17 states have call successors, (48) Word has length 308 [2022-04-06 22:20:32,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:20:32,690 INFO L225 Difference]: With dead ends: 1752 [2022-04-06 22:20:32,690 INFO L226 Difference]: Without dead ends: 1743 [2022-04-06 22:20:32,691 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 630 GetRequests, 581 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1091, Invalid=1459, Unknown=0, NotChecked=0, Total=2550 [2022-04-06 22:20:32,691 INFO L913 BasicCegarLoop]: 77 mSDtfsCounter, 70 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 22:20:32,691 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 292 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 22:20:32,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1743 states. [2022-04-06 22:20:33,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1743 to 1741. [2022-04-06 22:20:33,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1741 states, 1137 states have (on average 1.0976253298153034) internal successors, (1248), 1175 states have internal predecessors, (1248), 388 states have call successors, (388), 216 states have call predecessors, (388), 215 states have return successors, (385), 349 states have call predecessors, (385), 385 states have call successors, (385) [2022-04-06 22:20:33,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1741 states to 1741 states and 2021 transitions. [2022-04-06 22:20:33,129 INFO L78 Accepts]: Start accepts. Automaton has 1741 states and 2021 transitions. Word has length 308 [2022-04-06 22:20:33,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:20:33,129 INFO L478 AbstractCegarLoop]: Abstraction has 1741 states and 2021 transitions. [2022-04-06 22:20:33,129 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.157894736842105) internal successors, (117), 18 states have internal predecessors, (117), 18 states have call successors, (50), 18 states have call predecessors, (50), 16 states have return successors, (48), 16 states have call predecessors, (48), 17 states have call successors, (48) [2022-04-06 22:20:33,130 INFO L276 IsEmpty]: Start isEmpty. Operand 1741 states and 2021 transitions. [2022-04-06 22:20:33,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2022-04-06 22:20:33,133 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:20:33,133 INFO L499 BasicCegarLoop]: trace histogram [49, 48, 48, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:20:33,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-04-06 22:20:33,333 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,SelfDestructingSolverStorable46 [2022-04-06 22:20:33,333 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:20:33,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:20:33,334 INFO L85 PathProgramCache]: Analyzing trace with hash 199884769, now seen corresponding path program 31 times [2022-04-06 22:20:33,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:20:33,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1348222582] [2022-04-06 22:20:33,334 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:20:33,334 INFO L85 PathProgramCache]: Analyzing trace with hash 199884769, now seen corresponding path program 32 times [2022-04-06 22:20:33,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:20:33,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315695404] [2022-04-06 22:20:33,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:20:33,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:20:33,341 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:20:33,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2069529411] [2022-04-06 22:20:33,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:20:33,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:20:33,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:20:33,342 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) [2022-04-06 22:20:33,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-04-06 22:20:33,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:20:33,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:20:33,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 739 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-06 22:20:33,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:20:33,962 INFO L134 CoverageAnalysis]: Checked inductivity of 5484 backedges. 96 proven. 5192 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-04-06 22:20:33,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:20:34,619 INFO L134 CoverageAnalysis]: Checked inductivity of 5484 backedges. 96 proven. 872 refuted. 0 times theorem prover too weak. 4516 trivial. 0 not checked. [2022-04-06 22:20:34,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:20:34,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315695404] [2022-04-06 22:20:34,619 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:20:34,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069529411] [2022-04-06 22:20:34,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069529411] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:20:34,619 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:20:34,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2022-04-06 22:20:34,620 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:20:34,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1348222582] [2022-04-06 22:20:34,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1348222582] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:20:34,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:20:34,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 22:20:34,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069091117] [2022-04-06 22:20:34,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:20:34,620 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 22:20:34,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:20:34,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 22:20:34,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 22:20:34,621 INFO L87 Difference]: Start difference. First operand 1741 states and 2021 transitions. Second operand has 20 states, 20 states have (on average 6.2) internal successors, (124), 19 states have internal predecessors, (124), 19 states have call successors, (53), 19 states have call predecessors, (53), 17 states have return successors, (51), 17 states have call predecessors, (51), 18 states have call successors, (51) [2022-04-06 22:20:35,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:20:35,367 INFO L93 Difference]: Finished difference Result 1870 states and 2182 transitions. [2022-04-06 22:20:35,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-06 22:20:35,368 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 6.2) internal successors, (124), 19 states have internal predecessors, (124), 19 states have call successors, (53), 19 states have call predecessors, (53), 17 states have return successors, (51), 17 states have call predecessors, (51), 18 states have call successors, (51) Word has length 327 [2022-04-06 22:20:35,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:20:35,373 INFO L225 Difference]: With dead ends: 1870 [2022-04-06 22:20:35,373 INFO L226 Difference]: Without dead ends: 1861 [2022-04-06 22:20:35,374 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 669 GetRequests, 617 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1227, Invalid=1635, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 22:20:35,374 INFO L913 BasicCegarLoop]: 80 mSDtfsCounter, 59 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 22:20:35,374 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 314 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 22:20:35,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1861 states. [2022-04-06 22:20:35,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1861 to 1859. [2022-04-06 22:20:35,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1859 states, 1213 states have (on average 1.0972794723825228) internal successors, (1331), 1254 states have internal predecessors, (1331), 416 states have call successors, (416), 230 states have call predecessors, (416), 229 states have return successors, (413), 374 states have call predecessors, (413), 413 states have call successors, (413) [2022-04-06 22:20:35,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1859 states to 1859 states and 2160 transitions. [2022-04-06 22:20:35,844 INFO L78 Accepts]: Start accepts. Automaton has 1859 states and 2160 transitions. Word has length 327 [2022-04-06 22:20:35,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:20:35,844 INFO L478 AbstractCegarLoop]: Abstraction has 1859 states and 2160 transitions. [2022-04-06 22:20:35,845 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 6.2) internal successors, (124), 19 states have internal predecessors, (124), 19 states have call successors, (53), 19 states have call predecessors, (53), 17 states have return successors, (51), 17 states have call predecessors, (51), 18 states have call successors, (51) [2022-04-06 22:20:35,845 INFO L276 IsEmpty]: Start isEmpty. Operand 1859 states and 2160 transitions. [2022-04-06 22:20:35,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2022-04-06 22:20:35,848 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:20:35,848 INFO L499 BasicCegarLoop]: trace histogram [52, 51, 51, 18, 17, 17, 17, 17, 17, 17, 17, 17, 17, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:20:35,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-04-06 22:20:36,063 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:20:36,063 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:20:36,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:20:36,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1842167022, now seen corresponding path program 33 times [2022-04-06 22:20:36,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:20:36,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [930773856] [2022-04-06 22:20:36,064 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:20:36,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1842167022, now seen corresponding path program 34 times [2022-04-06 22:20:36,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:20:36,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637341743] [2022-04-06 22:20:36,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:20:36,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:20:36,075 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:20:36,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2055524957] [2022-04-06 22:20:36,075 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 22:20:36,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:20:36,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:20:36,077 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) [2022-04-06 22:20:36,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-04-06 22:20:36,204 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 22:20:36,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:20:36,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 779 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-06 22:20:36,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:20:36,808 INFO L134 CoverageAnalysis]: Checked inductivity of 6192 backedges. 102 proven. 5882 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2022-04-06 22:20:36,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:20:37,566 INFO L134 CoverageAnalysis]: Checked inductivity of 6192 backedges. 102 proven. 986 refuted. 0 times theorem prover too weak. 5104 trivial. 0 not checked. [2022-04-06 22:20:37,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:20:37,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637341743] [2022-04-06 22:20:37,567 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:20:37,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055524957] [2022-04-06 22:20:37,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055524957] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:20:37,567 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:20:37,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 40 [2022-04-06 22:20:37,567 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:20:37,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [930773856] [2022-04-06 22:20:37,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [930773856] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:20:37,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:20:37,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 22:20:37,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85872730] [2022-04-06 22:20:37,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:20:37,568 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 22:20:37,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:20:37,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 22:20:37,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=708, Invalid=852, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 22:20:37,569 INFO L87 Difference]: Start difference. First operand 1859 states and 2160 transitions. Second operand has 21 states, 21 states have (on average 6.238095238095238) internal successors, (131), 20 states have internal predecessors, (131), 20 states have call successors, (56), 20 states have call predecessors, (56), 18 states have return successors, (54), 18 states have call predecessors, (54), 19 states have call successors, (54) [2022-04-06 22:20:38,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:20:38,387 INFO L93 Difference]: Finished difference Result 1988 states and 2321 transitions. [2022-04-06 22:20:38,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 22:20:38,388 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 6.238095238095238) internal successors, (131), 20 states have internal predecessors, (131), 20 states have call successors, (56), 20 states have call predecessors, (56), 18 states have return successors, (54), 18 states have call predecessors, (54), 19 states have call successors, (54) Word has length 346 [2022-04-06 22:20:38,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:20:38,393 INFO L225 Difference]: With dead ends: 1988 [2022-04-06 22:20:38,393 INFO L226 Difference]: Without dead ends: 1979 [2022-04-06 22:20:38,394 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 708 GetRequests, 653 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1371, Invalid=1821, Unknown=0, NotChecked=0, Total=3192 [2022-04-06 22:20:38,394 INFO L913 BasicCegarLoop]: 83 mSDtfsCounter, 59 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 22:20:38,394 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 306 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 22:20:38,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1979 states. [2022-04-06 22:20:38,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1979 to 1977. [2022-04-06 22:20:38,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1977 states, 1289 states have (on average 1.0969743987587277) internal successors, (1414), 1333 states have internal predecessors, (1414), 444 states have call successors, (444), 244 states have call predecessors, (444), 243 states have return successors, (441), 399 states have call predecessors, (441), 441 states have call successors, (441) [2022-04-06 22:20:38,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1977 states to 1977 states and 2299 transitions. [2022-04-06 22:20:38,900 INFO L78 Accepts]: Start accepts. Automaton has 1977 states and 2299 transitions. Word has length 346 [2022-04-06 22:20:38,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:20:38,900 INFO L478 AbstractCegarLoop]: Abstraction has 1977 states and 2299 transitions. [2022-04-06 22:20:38,900 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 6.238095238095238) internal successors, (131), 20 states have internal predecessors, (131), 20 states have call successors, (56), 20 states have call predecessors, (56), 18 states have return successors, (54), 18 states have call predecessors, (54), 19 states have call successors, (54) [2022-04-06 22:20:38,900 INFO L276 IsEmpty]: Start isEmpty. Operand 1977 states and 2299 transitions. [2022-04-06 22:20:38,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2022-04-06 22:20:38,904 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:20:38,904 INFO L499 BasicCegarLoop]: trace histogram [55, 54, 54, 19, 18, 18, 18, 18, 18, 18, 18, 18, 18, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:20:38,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-04-06 22:20:39,105 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-04-06 22:20:39,105 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:20:39,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:20:39,105 INFO L85 PathProgramCache]: Analyzing trace with hash 858728513, now seen corresponding path program 35 times [2022-04-06 22:20:39,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:20:39,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1062352410] [2022-04-06 22:20:39,106 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:20:39,106 INFO L85 PathProgramCache]: Analyzing trace with hash 858728513, now seen corresponding path program 36 times [2022-04-06 22:20:39,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:20:39,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066874242] [2022-04-06 22:20:39,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:20:39,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:20:39,114 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:20:39,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [582510949] [2022-04-06 22:20:39,114 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 22:20:39,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:20:39,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:20:39,115 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) [2022-04-06 22:20:39,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-04-06 22:20:40,940 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2022-04-06 22:20:40,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:20:40,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 819 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 22:20:40,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:20:41,571 INFO L134 CoverageAnalysis]: Checked inductivity of 6943 backedges. 108 proven. 6615 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-04-06 22:20:41,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:20:42,367 INFO L134 CoverageAnalysis]: Checked inductivity of 6943 backedges. 108 proven. 1107 refuted. 0 times theorem prover too weak. 5728 trivial. 0 not checked. [2022-04-06 22:20:42,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:20:42,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066874242] [2022-04-06 22:20:42,367 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:20:42,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582510949] [2022-04-06 22:20:42,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582510949] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:20:42,368 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:20:42,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2022-04-06 22:20:42,368 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:20:42,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1062352410] [2022-04-06 22:20:42,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1062352410] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:20:42,368 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:20:42,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 22:20:42,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973810292] [2022-04-06 22:20:42,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:20:42,369 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 22:20:42,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:20:42,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 22:20:42,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=937, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 22:20:42,370 INFO L87 Difference]: Start difference. First operand 1977 states and 2299 transitions. Second operand has 22 states, 22 states have (on average 6.2727272727272725) internal successors, (138), 21 states have internal predecessors, (138), 21 states have call successors, (59), 21 states have call predecessors, (59), 19 states have return successors, (57), 19 states have call predecessors, (57), 20 states have call successors, (57) [2022-04-06 22:20:43,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:20:43,283 INFO L93 Difference]: Finished difference Result 2106 states and 2460 transitions. [2022-04-06 22:20:43,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-06 22:20:43,283 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 6.2727272727272725) internal successors, (138), 21 states have internal predecessors, (138), 21 states have call successors, (59), 21 states have call predecessors, (59), 19 states have return successors, (57), 19 states have call predecessors, (57), 20 states have call successors, (57) Word has length 365 [2022-04-06 22:20:43,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:20:43,296 INFO L225 Difference]: With dead ends: 2106 [2022-04-06 22:20:43,296 INFO L226 Difference]: Without dead ends: 2097 [2022-04-06 22:20:43,298 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 747 GetRequests, 689 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1523, Invalid=2017, Unknown=0, NotChecked=0, Total=3540 [2022-04-06 22:20:43,298 INFO L913 BasicCegarLoop]: 86 mSDtfsCounter, 59 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 22:20:43,298 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 328 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 22:20:43,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2022-04-06 22:20:43,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 2095. [2022-04-06 22:20:43,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2095 states, 1365 states have (on average 1.0967032967032968) internal successors, (1497), 1412 states have internal predecessors, (1497), 472 states have call successors, (472), 258 states have call predecessors, (472), 257 states have return successors, (469), 424 states have call predecessors, (469), 469 states have call successors, (469) [2022-04-06 22:20:43,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2095 states to 2095 states and 2438 transitions. [2022-04-06 22:20:43,833 INFO L78 Accepts]: Start accepts. Automaton has 2095 states and 2438 transitions. Word has length 365 [2022-04-06 22:20:43,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:20:43,833 INFO L478 AbstractCegarLoop]: Abstraction has 2095 states and 2438 transitions. [2022-04-06 22:20:43,834 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 6.2727272727272725) internal successors, (138), 21 states have internal predecessors, (138), 21 states have call successors, (59), 21 states have call predecessors, (59), 19 states have return successors, (57), 19 states have call predecessors, (57), 20 states have call successors, (57) [2022-04-06 22:20:43,834 INFO L276 IsEmpty]: Start isEmpty. Operand 2095 states and 2438 transitions. [2022-04-06 22:20:43,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2022-04-06 22:20:43,838 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:20:43,838 INFO L499 BasicCegarLoop]: trace histogram [58, 57, 57, 20, 19, 19, 19, 19, 19, 19, 19, 19, 19, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:20:43,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-04-06 22:20:44,043 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,SelfDestructingSolverStorable49 [2022-04-06 22:20:44,043 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:20:44,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:20:44,044 INFO L85 PathProgramCache]: Analyzing trace with hash -117637454, now seen corresponding path program 37 times [2022-04-06 22:20:44,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:20:44,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [401785080] [2022-04-06 22:20:44,044 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:20:44,044 INFO L85 PathProgramCache]: Analyzing trace with hash -117637454, now seen corresponding path program 38 times [2022-04-06 22:20:44,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:20:44,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039434769] [2022-04-06 22:20:44,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:20:44,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:20:44,052 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:20:44,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [151609815] [2022-04-06 22:20:44,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:20:44,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:20:44,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:20:44,053 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) [2022-04-06 22:20:44,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-04-06 22:20:44,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:20:44,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:20:44,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 859 conjuncts, 43 conjunts are in the unsatisfiable core [2022-04-06 22:20:44,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:20:44,785 INFO L134 CoverageAnalysis]: Checked inductivity of 7737 backedges. 114 proven. 7391 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2022-04-06 22:20:44,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:20:45,586 INFO L134 CoverageAnalysis]: Checked inductivity of 7737 backedges. 114 proven. 1235 refuted. 0 times theorem prover too weak. 6388 trivial. 0 not checked. [2022-04-06 22:20:45,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:20:45,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039434769] [2022-04-06 22:20:45,586 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:20:45,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151609815] [2022-04-06 22:20:45,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151609815] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:20:45,586 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:20:45,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 44 [2022-04-06 22:20:45,587 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:20:45,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [401785080] [2022-04-06 22:20:45,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [401785080] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:20:45,587 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:20:45,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 22:20:45,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218850615] [2022-04-06 22:20:45,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:20:45,587 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 22:20:45,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:20:45,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 22:20:45,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=866, Invalid=1026, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 22:20:45,588 INFO L87 Difference]: Start difference. First operand 2095 states and 2438 transitions. Second operand has 23 states, 23 states have (on average 6.304347826086956) internal successors, (145), 22 states have internal predecessors, (145), 22 states have call successors, (62), 22 states have call predecessors, (62), 20 states have return successors, (60), 20 states have call predecessors, (60), 21 states have call successors, (60) [2022-04-06 22:20:46,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:20:46,500 INFO L93 Difference]: Finished difference Result 2224 states and 2599 transitions. [2022-04-06 22:20:46,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-04-06 22:20:46,501 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 6.304347826086956) internal successors, (145), 22 states have internal predecessors, (145), 22 states have call successors, (62), 22 states have call predecessors, (62), 20 states have return successors, (60), 20 states have call predecessors, (60), 21 states have call successors, (60) Word has length 384 [2022-04-06 22:20:46,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:20:46,506 INFO L225 Difference]: With dead ends: 2224 [2022-04-06 22:20:46,506 INFO L226 Difference]: Without dead ends: 2215 [2022-04-06 22:20:46,507 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 786 GetRequests, 725 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1683, Invalid=2223, Unknown=0, NotChecked=0, Total=3906 [2022-04-06 22:20:46,507 INFO L913 BasicCegarLoop]: 89 mSDtfsCounter, 109 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 22:20:46,508 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 320 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 22:20:46,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2215 states. [2022-04-06 22:20:47,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2215 to 2213. [2022-04-06 22:20:47,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2213 states, 1441 states have (on average 1.0964607911172797) internal successors, (1580), 1491 states have internal predecessors, (1580), 500 states have call successors, (500), 272 states have call predecessors, (500), 271 states have return successors, (497), 449 states have call predecessors, (497), 497 states have call successors, (497) [2022-04-06 22:20:47,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2213 states to 2213 states and 2577 transitions. [2022-04-06 22:20:47,083 INFO L78 Accepts]: Start accepts. Automaton has 2213 states and 2577 transitions. Word has length 384 [2022-04-06 22:20:47,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:20:47,083 INFO L478 AbstractCegarLoop]: Abstraction has 2213 states and 2577 transitions. [2022-04-06 22:20:47,083 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 6.304347826086956) internal successors, (145), 22 states have internal predecessors, (145), 22 states have call successors, (62), 22 states have call predecessors, (62), 20 states have return successors, (60), 20 states have call predecessors, (60), 21 states have call successors, (60) [2022-04-06 22:20:47,083 INFO L276 IsEmpty]: Start isEmpty. Operand 2213 states and 2577 transitions. [2022-04-06 22:20:47,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2022-04-06 22:20:47,088 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:20:47,088 INFO L499 BasicCegarLoop]: trace histogram [61, 60, 60, 21, 20, 20, 20, 20, 20, 20, 20, 20, 20, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:20:47,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-04-06 22:20:47,294 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:20:47,294 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:20:47,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:20:47,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1169361057, now seen corresponding path program 39 times [2022-04-06 22:20:47,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:20:47,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1409349371] [2022-04-06 22:20:47,295 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:20:47,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1169361057, now seen corresponding path program 40 times [2022-04-06 22:20:47,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:20:47,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904543287] [2022-04-06 22:20:47,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:20:47,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:20:47,303 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:20:47,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1158389197] [2022-04-06 22:20:47,303 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 22:20:47,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:20:47,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:20:47,304 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) [2022-04-06 22:20:47,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-04-06 22:20:47,424 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 22:20:47,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:20:47,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 899 conjuncts, 45 conjunts are in the unsatisfiable core [2022-04-06 22:20:47,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:20:48,099 INFO L134 CoverageAnalysis]: Checked inductivity of 8574 backedges. 120 proven. 8210 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2022-04-06 22:20:48,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:20:48,975 INFO L134 CoverageAnalysis]: Checked inductivity of 8574 backedges. 120 proven. 1370 refuted. 0 times theorem prover too weak. 7084 trivial. 0 not checked. [2022-04-06 22:20:48,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:20:48,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904543287] [2022-04-06 22:20:48,976 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:20:48,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158389197] [2022-04-06 22:20:48,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158389197] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:20:48,976 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:20:48,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2022-04-06 22:20:48,976 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:20:48,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1409349371] [2022-04-06 22:20:48,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1409349371] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:20:48,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:20:48,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 22:20:48,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70029256] [2022-04-06 22:20:48,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:20:48,977 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 22:20:48,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:20:48,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 22:20:48,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=951, Invalid=1119, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 22:20:48,978 INFO L87 Difference]: Start difference. First operand 2213 states and 2577 transitions. Second operand has 24 states, 24 states have (on average 6.333333333333333) internal successors, (152), 23 states have internal predecessors, (152), 23 states have call successors, (65), 23 states have call predecessors, (65), 21 states have return successors, (63), 21 states have call predecessors, (63), 22 states have call successors, (63) [2022-04-06 22:20:49,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:20:49,958 INFO L93 Difference]: Finished difference Result 2342 states and 2738 transitions. [2022-04-06 22:20:49,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-04-06 22:20:49,959 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 6.333333333333333) internal successors, (152), 23 states have internal predecessors, (152), 23 states have call successors, (65), 23 states have call predecessors, (65), 21 states have return successors, (63), 21 states have call predecessors, (63), 22 states have call successors, (63) Word has length 403 [2022-04-06 22:20:49,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:20:49,964 INFO L225 Difference]: With dead ends: 2342 [2022-04-06 22:20:49,964 INFO L226 Difference]: Without dead ends: 2333 [2022-04-06 22:20:49,965 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 825 GetRequests, 761 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1851, Invalid=2439, Unknown=0, NotChecked=0, Total=4290 [2022-04-06 22:20:49,965 INFO L913 BasicCegarLoop]: 92 mSDtfsCounter, 57 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 22:20:49,966 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 382 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 22:20:49,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2333 states. [2022-04-06 22:20:50,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2333 to 2331. [2022-04-06 22:20:50,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2331 states, 1517 states have (on average 1.096242584047462) internal successors, (1663), 1570 states have internal predecessors, (1663), 528 states have call successors, (528), 286 states have call predecessors, (528), 285 states have return successors, (525), 474 states have call predecessors, (525), 525 states have call successors, (525) [2022-04-06 22:20:50,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 2716 transitions. [2022-04-06 22:20:50,563 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 2716 transitions. Word has length 403 [2022-04-06 22:20:50,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:20:50,563 INFO L478 AbstractCegarLoop]: Abstraction has 2331 states and 2716 transitions. [2022-04-06 22:20:50,564 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.333333333333333) internal successors, (152), 23 states have internal predecessors, (152), 23 states have call successors, (65), 23 states have call predecessors, (65), 21 states have return successors, (63), 21 states have call predecessors, (63), 22 states have call successors, (63) [2022-04-06 22:20:50,564 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 2716 transitions. [2022-04-06 22:20:50,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2022-04-06 22:20:50,568 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:20:50,568 INFO L499 BasicCegarLoop]: trace histogram [64, 63, 63, 22, 21, 21, 21, 21, 21, 21, 21, 21, 21, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:20:50,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-04-06 22:20:50,769 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,SelfDestructingSolverStorable51 [2022-04-06 22:20:50,769 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:20:50,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:20:50,769 INFO L85 PathProgramCache]: Analyzing trace with hash -774012334, now seen corresponding path program 41 times [2022-04-06 22:20:50,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:20:50,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1497719866] [2022-04-06 22:20:50,770 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:20:50,770 INFO L85 PathProgramCache]: Analyzing trace with hash -774012334, now seen corresponding path program 42 times [2022-04-06 22:20:50,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:20:50,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482051742] [2022-04-06 22:20:50,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:20:50,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:20:50,779 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:20:50,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2002691541] [2022-04-06 22:20:50,779 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 22:20:50,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:20:50,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:20:50,780 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) [2022-04-06 22:20:50,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-04-06 22:20:52,803 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 42 check-sat command(s) [2022-04-06 22:20:52,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:20:52,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 939 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-06 22:20:52,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:20:53,533 INFO L134 CoverageAnalysis]: Checked inductivity of 9454 backedges. 126 proven. 9072 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2022-04-06 22:20:53,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:20:54,456 INFO L134 CoverageAnalysis]: Checked inductivity of 9454 backedges. 126 proven. 1512 refuted. 0 times theorem prover too weak. 7816 trivial. 0 not checked. [2022-04-06 22:20:54,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:20:54,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482051742] [2022-04-06 22:20:54,456 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:20:54,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002691541] [2022-04-06 22:20:54,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002691541] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:20:54,456 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:20:54,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2022-04-06 22:20:54,456 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:20:54,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1497719866] [2022-04-06 22:20:54,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1497719866] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:20:54,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:20:54,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 22:20:54,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583223095] [2022-04-06 22:20:54,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:20:54,457 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 22:20:54,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:20:54,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 22:20:54,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1040, Invalid=1216, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 22:20:54,458 INFO L87 Difference]: Start difference. First operand 2331 states and 2716 transitions. Second operand has 25 states, 25 states have (on average 6.36) internal successors, (159), 24 states have internal predecessors, (159), 24 states have call successors, (68), 24 states have call predecessors, (68), 22 states have return successors, (66), 22 states have call predecessors, (66), 23 states have call successors, (66) [2022-04-06 22:20:55,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:20:55,538 INFO L93 Difference]: Finished difference Result 2460 states and 2877 transitions. [2022-04-06 22:20:55,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-04-06 22:20:55,539 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 6.36) internal successors, (159), 24 states have internal predecessors, (159), 24 states have call successors, (68), 24 states have call predecessors, (68), 22 states have return successors, (66), 22 states have call predecessors, (66), 23 states have call successors, (66) Word has length 422 [2022-04-06 22:20:55,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:20:55,544 INFO L225 Difference]: With dead ends: 2460 [2022-04-06 22:20:55,544 INFO L226 Difference]: Without dead ends: 2451 [2022-04-06 22:20:55,545 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 864 GetRequests, 797 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2027, Invalid=2665, Unknown=0, NotChecked=0, Total=4692 [2022-04-06 22:20:55,545 INFO L913 BasicCegarLoop]: 95 mSDtfsCounter, 60 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 22:20:55,545 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 354 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 22:20:55,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2451 states. [2022-04-06 22:20:56,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2451 to 2449. [2022-04-06 22:20:56,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2449 states, 1593 states have (on average 1.0960451977401129) internal successors, (1746), 1649 states have internal predecessors, (1746), 556 states have call successors, (556), 300 states have call predecessors, (556), 299 states have return successors, (553), 499 states have call predecessors, (553), 553 states have call successors, (553) [2022-04-06 22:20:56,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2449 states to 2449 states and 2855 transitions. [2022-04-06 22:20:56,169 INFO L78 Accepts]: Start accepts. Automaton has 2449 states and 2855 transitions. Word has length 422 [2022-04-06 22:20:56,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:20:56,169 INFO L478 AbstractCegarLoop]: Abstraction has 2449 states and 2855 transitions. [2022-04-06 22:20:56,169 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.36) internal successors, (159), 24 states have internal predecessors, (159), 24 states have call successors, (68), 24 states have call predecessors, (68), 22 states have return successors, (66), 22 states have call predecessors, (66), 23 states have call successors, (66) [2022-04-06 22:20:56,169 INFO L276 IsEmpty]: Start isEmpty. Operand 2449 states and 2855 transitions. [2022-04-06 22:20:56,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 442 [2022-04-06 22:20:56,174 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:20:56,174 INFO L499 BasicCegarLoop]: trace histogram [67, 66, 66, 23, 22, 22, 22, 22, 22, 22, 22, 22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:20:56,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-04-06 22:20:56,374 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:20:56,374 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:20:56,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:20:56,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1767137023, now seen corresponding path program 43 times [2022-04-06 22:20:56,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:20:56,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [545455262] [2022-04-06 22:20:56,375 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:20:56,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1767137023, now seen corresponding path program 44 times [2022-04-06 22:20:56,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:20:56,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980053082] [2022-04-06 22:20:56,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:20:56,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:20:56,384 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:20:56,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1104483223] [2022-04-06 22:20:56,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:20:56,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:20:56,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:20:56,385 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) [2022-04-06 22:20:56,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-04-06 22:20:56,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:20:56,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:20:56,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 979 conjuncts, 49 conjunts are in the unsatisfiable core [2022-04-06 22:20:56,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:20:57,247 INFO L134 CoverageAnalysis]: Checked inductivity of 10377 backedges. 132 proven. 9977 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-04-06 22:20:57,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:20:58,218 INFO L134 CoverageAnalysis]: Checked inductivity of 10377 backedges. 132 proven. 1661 refuted. 0 times theorem prover too weak. 8584 trivial. 0 not checked. [2022-04-06 22:20:58,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:20:58,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980053082] [2022-04-06 22:20:58,218 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:20:58,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104483223] [2022-04-06 22:20:58,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104483223] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:20:58,218 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:20:58,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2022-04-06 22:20:58,219 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:20:58,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [545455262] [2022-04-06 22:20:58,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [545455262] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:20:58,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:20:58,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 22:20:58,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740366963] [2022-04-06 22:20:58,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:20:58,219 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 22:20:58,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:20:58,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 22:20:58,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 22:20:58,230 INFO L87 Difference]: Start difference. First operand 2449 states and 2855 transitions. Second operand has 26 states, 26 states have (on average 6.384615384615385) internal successors, (166), 25 states have internal predecessors, (166), 25 states have call successors, (71), 25 states have call predecessors, (71), 23 states have return successors, (69), 23 states have call predecessors, (69), 24 states have call successors, (69) [2022-04-06 22:20:59,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:20:59,343 INFO L93 Difference]: Finished difference Result 2578 states and 3016 transitions. [2022-04-06 22:20:59,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-04-06 22:20:59,344 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 6.384615384615385) internal successors, (166), 25 states have internal predecessors, (166), 25 states have call successors, (71), 25 states have call predecessors, (71), 23 states have return successors, (69), 23 states have call predecessors, (69), 24 states have call successors, (69) Word has length 441 [2022-04-06 22:20:59,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:20:59,349 INFO L225 Difference]: With dead ends: 2578 [2022-04-06 22:20:59,349 INFO L226 Difference]: Without dead ends: 2569 [2022-04-06 22:20:59,350 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 903 GetRequests, 833 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2211, Invalid=2901, Unknown=0, NotChecked=0, Total=5112 [2022-04-06 22:20:59,350 INFO L913 BasicCegarLoop]: 98 mSDtfsCounter, 96 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 22:20:59,350 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 406 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 22:20:59,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2569 states. [2022-04-06 22:21:00,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2569 to 2567. [2022-04-06 22:21:00,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2567 states, 1669 states have (on average 1.0958657878969442) internal successors, (1829), 1728 states have internal predecessors, (1829), 584 states have call successors, (584), 314 states have call predecessors, (584), 313 states have return successors, (581), 524 states have call predecessors, (581), 581 states have call successors, (581) [2022-04-06 22:21:00,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2567 states to 2567 states and 2994 transitions. [2022-04-06 22:21:00,013 INFO L78 Accepts]: Start accepts. Automaton has 2567 states and 2994 transitions. Word has length 441 [2022-04-06 22:21:00,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:21:00,014 INFO L478 AbstractCegarLoop]: Abstraction has 2567 states and 2994 transitions. [2022-04-06 22:21:00,014 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.384615384615385) internal successors, (166), 25 states have internal predecessors, (166), 25 states have call successors, (71), 25 states have call predecessors, (71), 23 states have return successors, (69), 23 states have call predecessors, (69), 24 states have call successors, (69) [2022-04-06 22:21:00,014 INFO L276 IsEmpty]: Start isEmpty. Operand 2567 states and 2994 transitions. [2022-04-06 22:21:00,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2022-04-06 22:21:00,021 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:21:00,021 INFO L499 BasicCegarLoop]: trace histogram [70, 69, 69, 24, 23, 23, 23, 23, 23, 23, 23, 23, 23, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:21:00,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-04-06 22:21:00,221 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,SelfDestructingSolverStorable53 [2022-04-06 22:21:00,221 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:21:00,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:21:00,222 INFO L85 PathProgramCache]: Analyzing trace with hash 568217074, now seen corresponding path program 45 times [2022-04-06 22:21:00,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:21:00,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1907554043] [2022-04-06 22:21:00,222 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:21:00,222 INFO L85 PathProgramCache]: Analyzing trace with hash 568217074, now seen corresponding path program 46 times [2022-04-06 22:21:00,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:21:00,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964621954] [2022-04-06 22:21:00,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:21:00,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:21:00,230 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:21:00,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1782358653] [2022-04-06 22:21:00,231 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 22:21:00,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:21:00,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:21:00,231 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) [2022-04-06 22:21:00,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-04-06 22:21:00,361 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 22:21:00,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:21:00,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 1019 conjuncts, 51 conjunts are in the unsatisfiable core [2022-04-06 22:21:00,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:21:01,129 INFO L134 CoverageAnalysis]: Checked inductivity of 11343 backedges. 138 proven. 10925 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2022-04-06 22:21:01,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:21:02,165 INFO L134 CoverageAnalysis]: Checked inductivity of 11343 backedges. 138 proven. 1817 refuted. 0 times theorem prover too weak. 9388 trivial. 0 not checked. [2022-04-06 22:21:02,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:21:02,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964621954] [2022-04-06 22:21:02,166 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:21:02,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782358653] [2022-04-06 22:21:02,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782358653] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:21:02,166 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:21:02,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2022-04-06 22:21:02,166 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:21:02,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1907554043] [2022-04-06 22:21:02,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1907554043] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:21:02,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:21:02,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 22:21:02,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168863738] [2022-04-06 22:21:02,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:21:02,167 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 22:21:02,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:21:02,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 22:21:02,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1230, Invalid=1422, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 22:21:02,168 INFO L87 Difference]: Start difference. First operand 2567 states and 2994 transitions. Second operand has 27 states, 27 states have (on average 6.407407407407407) internal successors, (173), 26 states have internal predecessors, (173), 26 states have call successors, (74), 26 states have call predecessors, (74), 24 states have return successors, (72), 24 states have call predecessors, (72), 25 states have call successors, (72) [2022-04-06 22:21:03,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:21:03,312 INFO L93 Difference]: Finished difference Result 2696 states and 3155 transitions. [2022-04-06 22:21:03,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-04-06 22:21:03,315 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 6.407407407407407) internal successors, (173), 26 states have internal predecessors, (173), 26 states have call successors, (74), 26 states have call predecessors, (74), 24 states have return successors, (72), 24 states have call predecessors, (72), 25 states have call successors, (72) Word has length 460 [2022-04-06 22:21:03,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:21:03,322 INFO L225 Difference]: With dead ends: 2696 [2022-04-06 22:21:03,322 INFO L226 Difference]: Without dead ends: 2687 [2022-04-06 22:21:03,323 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 942 GetRequests, 869 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2403, Invalid=3147, Unknown=0, NotChecked=0, Total=5550 [2022-04-06 22:21:03,323 INFO L913 BasicCegarLoop]: 101 mSDtfsCounter, 82 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 22:21:03,323 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 388 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 22:21:03,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2687 states. [2022-04-06 22:21:04,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2687 to 2685. [2022-04-06 22:21:04,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2685 states, 1745 states have (on average 1.095702005730659) internal successors, (1912), 1807 states have internal predecessors, (1912), 612 states have call successors, (612), 328 states have call predecessors, (612), 327 states have return successors, (609), 549 states have call predecessors, (609), 609 states have call successors, (609) [2022-04-06 22:21:04,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2685 states to 2685 states and 3133 transitions. [2022-04-06 22:21:04,021 INFO L78 Accepts]: Start accepts. Automaton has 2685 states and 3133 transitions. Word has length 460 [2022-04-06 22:21:04,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:21:04,021 INFO L478 AbstractCegarLoop]: Abstraction has 2685 states and 3133 transitions. [2022-04-06 22:21:04,022 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 6.407407407407407) internal successors, (173), 26 states have internal predecessors, (173), 26 states have call successors, (74), 26 states have call predecessors, (74), 24 states have return successors, (72), 24 states have call predecessors, (72), 25 states have call successors, (72) [2022-04-06 22:21:04,022 INFO L276 IsEmpty]: Start isEmpty. Operand 2685 states and 3133 transitions. [2022-04-06 22:21:04,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2022-04-06 22:21:04,027 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:21:04,027 INFO L499 BasicCegarLoop]: trace histogram [73, 72, 72, 25, 24, 24, 24, 24, 24, 24, 24, 24, 24, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:21:04,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-04-06 22:21:04,227 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-04-06 22:21:04,227 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:21:04,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:21:04,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1624174945, now seen corresponding path program 47 times [2022-04-06 22:21:04,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:21:04,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [787733009] [2022-04-06 22:21:04,228 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:21:04,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1624174945, now seen corresponding path program 48 times [2022-04-06 22:21:04,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:21:04,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864413951] [2022-04-06 22:21:04,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:21:04,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:21:04,237 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:21:04,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1187633149] [2022-04-06 22:21:04,237 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 22:21:04,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:21:04,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:21:04,238 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) [2022-04-06 22:21:04,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-04-06 22:21:04,562 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 45 check-sat command(s) [2022-04-06 22:21:04,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:21:04,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 1032 conjuncts, 53 conjunts are in the unsatisfiable core [2022-04-06 22:21:04,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:21:05,397 INFO L134 CoverageAnalysis]: Checked inductivity of 12352 backedges. 144 proven. 11916 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2022-04-06 22:21:05,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:21:06,505 INFO L134 CoverageAnalysis]: Checked inductivity of 12352 backedges. 144 proven. 1980 refuted. 0 times theorem prover too weak. 10228 trivial. 0 not checked. [2022-04-06 22:21:06,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:21:06,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864413951] [2022-04-06 22:21:06,506 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:21:06,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187633149] [2022-04-06 22:21:06,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187633149] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:21:06,506 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:21:06,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 54 [2022-04-06 22:21:06,506 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:21:06,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [787733009] [2022-04-06 22:21:06,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [787733009] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:21:06,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:21:06,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-04-06 22:21:06,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916647672] [2022-04-06 22:21:06,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:21:06,507 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-04-06 22:21:06,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:21:06,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-04-06 22:21:06,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 22:21:06,508 INFO L87 Difference]: Start difference. First operand 2685 states and 3133 transitions. Second operand has 28 states, 28 states have (on average 6.428571428571429) internal successors, (180), 27 states have internal predecessors, (180), 27 states have call successors, (77), 27 states have call predecessors, (77), 25 states have return successors, (75), 25 states have call predecessors, (75), 26 states have call successors, (75) [2022-04-06 22:21:07,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:21:07,674 INFO L93 Difference]: Finished difference Result 2814 states and 3294 transitions. [2022-04-06 22:21:07,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-04-06 22:21:07,675 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 6.428571428571429) internal successors, (180), 27 states have internal predecessors, (180), 27 states have call successors, (77), 27 states have call predecessors, (77), 25 states have return successors, (75), 25 states have call predecessors, (75), 26 states have call successors, (75) Word has length 479 [2022-04-06 22:21:07,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:21:07,680 INFO L225 Difference]: With dead ends: 2814 [2022-04-06 22:21:07,680 INFO L226 Difference]: Without dead ends: 2805 [2022-04-06 22:21:07,681 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 981 GetRequests, 905 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2603, Invalid=3403, Unknown=0, NotChecked=0, Total=6006 [2022-04-06 22:21:07,681 INFO L913 BasicCegarLoop]: 104 mSDtfsCounter, 101 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 22:21:07,681 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 400 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 22:21:07,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2805 states. [2022-04-06 22:21:08,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2805 to 2803. [2022-04-06 22:21:08,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2803 states, 1821 states have (on average 1.0955518945634266) internal successors, (1995), 1886 states have internal predecessors, (1995), 640 states have call successors, (640), 342 states have call predecessors, (640), 341 states have return successors, (637), 574 states have call predecessors, (637), 637 states have call successors, (637) [2022-04-06 22:21:08,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2803 states to 2803 states and 3272 transitions. [2022-04-06 22:21:08,430 INFO L78 Accepts]: Start accepts. Automaton has 2803 states and 3272 transitions. Word has length 479 [2022-04-06 22:21:08,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:21:08,431 INFO L478 AbstractCegarLoop]: Abstraction has 2803 states and 3272 transitions. [2022-04-06 22:21:08,431 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.428571428571429) internal successors, (180), 27 states have internal predecessors, (180), 27 states have call successors, (77), 27 states have call predecessors, (77), 25 states have return successors, (75), 25 states have call predecessors, (75), 26 states have call successors, (75) [2022-04-06 22:21:08,431 INFO L276 IsEmpty]: Start isEmpty. Operand 2803 states and 3272 transitions. [2022-04-06 22:21:08,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2022-04-06 22:21:08,436 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:21:08,436 INFO L499 BasicCegarLoop]: trace histogram [76, 75, 75, 26, 25, 25, 25, 25, 25, 25, 25, 25, 25, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:21:08,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-04-06 22:21:08,637 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:21:08,637 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:21:08,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:21:08,637 INFO L85 PathProgramCache]: Analyzing trace with hash -695639662, now seen corresponding path program 49 times [2022-04-06 22:21:08,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:21:08,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2100995868] [2022-04-06 22:21:08,638 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:21:08,638 INFO L85 PathProgramCache]: Analyzing trace with hash -695639662, now seen corresponding path program 50 times [2022-04-06 22:21:08,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:21:08,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183260071] [2022-04-06 22:21:08,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:21:08,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:21:08,646 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:21:08,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1561050989] [2022-04-06 22:21:08,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:21:08,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:21:08,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:21:08,647 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) [2022-04-06 22:21:08,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-04-06 22:21:08,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:21:08,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:21:08,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 1099 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-06 22:21:08,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:21:09,623 INFO L134 CoverageAnalysis]: Checked inductivity of 13404 backedges. 150 proven. 12950 refuted. 0 times theorem prover too weak. 304 trivial. 0 not checked. [2022-04-06 22:21:09,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:21:10,815 INFO L134 CoverageAnalysis]: Checked inductivity of 13404 backedges. 150 proven. 2150 refuted. 0 times theorem prover too weak. 11104 trivial. 0 not checked. [2022-04-06 22:21:10,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:21:10,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183260071] [2022-04-06 22:21:10,816 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:21:10,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561050989] [2022-04-06 22:21:10,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561050989] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:21:10,816 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:21:10,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 56 [2022-04-06 22:21:10,816 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:21:10,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2100995868] [2022-04-06 22:21:10,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2100995868] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:21:10,816 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:21:10,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-04-06 22:21:10,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898277183] [2022-04-06 22:21:10,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:21:10,817 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 22:21:10,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:21:10,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 22:21:10,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1436, Invalid=1644, Unknown=0, NotChecked=0, Total=3080 [2022-04-06 22:21:10,818 INFO L87 Difference]: Start difference. First operand 2803 states and 3272 transitions. Second operand has 29 states, 29 states have (on average 6.448275862068965) internal successors, (187), 28 states have internal predecessors, (187), 28 states have call successors, (80), 28 states have call predecessors, (80), 26 states have return successors, (78), 26 states have call predecessors, (78), 27 states have call successors, (78) [2022-04-06 22:21:12,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:21:12,107 INFO L93 Difference]: Finished difference Result 2932 states and 3433 transitions. [2022-04-06 22:21:12,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-04-06 22:21:12,108 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 6.448275862068965) internal successors, (187), 28 states have internal predecessors, (187), 28 states have call successors, (80), 28 states have call predecessors, (80), 26 states have return successors, (78), 26 states have call predecessors, (78), 27 states have call successors, (78) Word has length 498 [2022-04-06 22:21:12,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:21:12,114 INFO L225 Difference]: With dead ends: 2932 [2022-04-06 22:21:12,114 INFO L226 Difference]: Without dead ends: 2923 [2022-04-06 22:21:12,114 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1020 GetRequests, 941 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2811, Invalid=3669, Unknown=0, NotChecked=0, Total=6480 [2022-04-06 22:21:12,115 INFO L913 BasicCegarLoop]: 107 mSDtfsCounter, 106 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 22:21:12,115 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 412 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 22:21:12,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2923 states. [2022-04-06 22:21:12,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2923 to 2921. [2022-04-06 22:21:12,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2921 states, 1897 states have (on average 1.09541381128097) internal successors, (2078), 1965 states have internal predecessors, (2078), 668 states have call successors, (668), 356 states have call predecessors, (668), 355 states have return successors, (665), 599 states have call predecessors, (665), 665 states have call successors, (665) [2022-04-06 22:21:12,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2921 states to 2921 states and 3411 transitions. [2022-04-06 22:21:12,865 INFO L78 Accepts]: Start accepts. Automaton has 2921 states and 3411 transitions. Word has length 498 [2022-04-06 22:21:12,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:21:12,865 INFO L478 AbstractCegarLoop]: Abstraction has 2921 states and 3411 transitions. [2022-04-06 22:21:12,865 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 6.448275862068965) internal successors, (187), 28 states have internal predecessors, (187), 28 states have call successors, (80), 28 states have call predecessors, (80), 26 states have return successors, (78), 26 states have call predecessors, (78), 27 states have call successors, (78) [2022-04-06 22:21:12,865 INFO L276 IsEmpty]: Start isEmpty. Operand 2921 states and 3411 transitions. [2022-04-06 22:21:12,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 518 [2022-04-06 22:21:12,871 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:21:12,871 INFO L499 BasicCegarLoop]: trace histogram [79, 78, 78, 27, 26, 26, 26, 26, 26, 26, 26, 26, 26, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:21:12,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-04-06 22:21:13,071 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:21:13,072 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:21:13,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:21:13,072 INFO L85 PathProgramCache]: Analyzing trace with hash 642972097, now seen corresponding path program 51 times [2022-04-06 22:21:13,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:21:13,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [706402972] [2022-04-06 22:21:13,073 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:21:13,073 INFO L85 PathProgramCache]: Analyzing trace with hash 642972097, now seen corresponding path program 52 times [2022-04-06 22:21:13,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:21:13,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442740011] [2022-04-06 22:21:13,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:21:13,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:21:13,081 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:21:13,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [116857164] [2022-04-06 22:21:13,082 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 22:21:13,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:21:13,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:21:13,083 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) [2022-04-06 22:21:13,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-04-06 22:21:13,225 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 22:21:13,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:21:13,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 1139 conjuncts, 57 conjunts are in the unsatisfiable core [2022-04-06 22:21:13,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:21:14,089 INFO L134 CoverageAnalysis]: Checked inductivity of 14499 backedges. 156 proven. 14027 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-04-06 22:21:14,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:21:15,325 INFO L134 CoverageAnalysis]: Checked inductivity of 14499 backedges. 156 proven. 2327 refuted. 0 times theorem prover too weak. 12016 trivial. 0 not checked. [2022-04-06 22:21:15,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:21:15,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442740011] [2022-04-06 22:21:15,326 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:21:15,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116857164] [2022-04-06 22:21:15,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116857164] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:21:15,326 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:21:15,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 58 [2022-04-06 22:21:15,326 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:21:15,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [706402972] [2022-04-06 22:21:15,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [706402972] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:21:15,326 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:21:15,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-04-06 22:21:15,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123950996] [2022-04-06 22:21:15,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:21:15,327 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-04-06 22:21:15,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:21:15,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-04-06 22:21:15,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1545, Invalid=1761, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 22:21:15,328 INFO L87 Difference]: Start difference. First operand 2921 states and 3411 transitions. Second operand has 30 states, 30 states have (on average 6.466666666666667) internal successors, (194), 29 states have internal predecessors, (194), 29 states have call successors, (83), 29 states have call predecessors, (83), 27 states have return successors, (81), 27 states have call predecessors, (81), 28 states have call successors, (81) [2022-04-06 22:21:16,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:21:16,648 INFO L93 Difference]: Finished difference Result 3050 states and 3572 transitions. [2022-04-06 22:21:16,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-04-06 22:21:16,648 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 6.466666666666667) internal successors, (194), 29 states have internal predecessors, (194), 29 states have call successors, (83), 29 states have call predecessors, (83), 27 states have return successors, (81), 27 states have call predecessors, (81), 28 states have call successors, (81) Word has length 517 [2022-04-06 22:21:16,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:21:16,654 INFO L225 Difference]: With dead ends: 3050 [2022-04-06 22:21:16,654 INFO L226 Difference]: Without dead ends: 3041 [2022-04-06 22:21:16,655 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1059 GetRequests, 977 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=3027, Invalid=3945, Unknown=0, NotChecked=0, Total=6972 [2022-04-06 22:21:16,655 INFO L913 BasicCegarLoop]: 110 mSDtfsCounter, 93 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 22:21:16,655 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 434 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 22:21:16,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3041 states. [2022-04-06 22:21:17,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3041 to 3039. [2022-04-06 22:21:17,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3039 states, 1973 states have (on average 1.0952863659401926) internal successors, (2161), 2044 states have internal predecessors, (2161), 696 states have call successors, (696), 370 states have call predecessors, (696), 369 states have return successors, (693), 624 states have call predecessors, (693), 693 states have call successors, (693) [2022-04-06 22:21:17,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3039 states to 3039 states and 3550 transitions. [2022-04-06 22:21:17,448 INFO L78 Accepts]: Start accepts. Automaton has 3039 states and 3550 transitions. Word has length 517 [2022-04-06 22:21:17,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:21:17,449 INFO L478 AbstractCegarLoop]: Abstraction has 3039 states and 3550 transitions. [2022-04-06 22:21:17,449 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 6.466666666666667) internal successors, (194), 29 states have internal predecessors, (194), 29 states have call successors, (83), 29 states have call predecessors, (83), 27 states have return successors, (81), 27 states have call predecessors, (81), 28 states have call successors, (81) [2022-04-06 22:21:17,449 INFO L276 IsEmpty]: Start isEmpty. Operand 3039 states and 3550 transitions. [2022-04-06 22:21:17,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 537 [2022-04-06 22:21:17,455 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:21:17,455 INFO L499 BasicCegarLoop]: trace histogram [82, 81, 81, 28, 27, 27, 27, 27, 27, 27, 27, 27, 27, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:21:17,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-04-06 22:21:17,655 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:21:17,655 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:21:17,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:21:17,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1709751602, now seen corresponding path program 53 times [2022-04-06 22:21:17,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:21:17,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [580400485] [2022-04-06 22:21:17,656 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:21:17,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1709751602, now seen corresponding path program 54 times [2022-04-06 22:21:17,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:21:17,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746207529] [2022-04-06 22:21:17,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:21:17,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:21:17,665 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:21:17,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1059970221] [2022-04-06 22:21:17,666 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 22:21:17,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:21:17,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:21:17,666 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) [2022-04-06 22:21:17,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-04-06 22:21:18,055 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) [2022-04-06 22:21:18,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:21:18,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 1152 conjuncts, 59 conjunts are in the unsatisfiable core [2022-04-06 22:21:18,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:21:18,946 INFO L134 CoverageAnalysis]: Checked inductivity of 15637 backedges. 162 proven. 15147 refuted. 0 times theorem prover too weak. 328 trivial. 0 not checked. [2022-04-06 22:21:18,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:21:20,218 INFO L134 CoverageAnalysis]: Checked inductivity of 15637 backedges. 162 proven. 2511 refuted. 0 times theorem prover too weak. 12964 trivial. 0 not checked. [2022-04-06 22:21:20,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:21:20,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746207529] [2022-04-06 22:21:20,218 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:21:20,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059970221] [2022-04-06 22:21:20,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059970221] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:21:20,218 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:21:20,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 60 [2022-04-06 22:21:20,219 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:21:20,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [580400485] [2022-04-06 22:21:20,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [580400485] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:21:20,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:21:20,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-04-06 22:21:20,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633093995] [2022-04-06 22:21:20,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:21:20,219 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-06 22:21:20,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:21:20,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-06 22:21:20,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1658, Invalid=1882, Unknown=0, NotChecked=0, Total=3540 [2022-04-06 22:21:20,221 INFO L87 Difference]: Start difference. First operand 3039 states and 3550 transitions. Second operand has 31 states, 31 states have (on average 6.483870967741935) internal successors, (201), 30 states have internal predecessors, (201), 30 states have call successors, (86), 30 states have call predecessors, (86), 28 states have return successors, (84), 28 states have call predecessors, (84), 29 states have call successors, (84) [2022-04-06 22:21:21,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:21:21,671 INFO L93 Difference]: Finished difference Result 3168 states and 3711 transitions. [2022-04-06 22:21:21,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-04-06 22:21:21,671 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 6.483870967741935) internal successors, (201), 30 states have internal predecessors, (201), 30 states have call successors, (86), 30 states have call predecessors, (86), 28 states have return successors, (84), 28 states have call predecessors, (84), 29 states have call successors, (84) Word has length 536 [2022-04-06 22:21:21,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:21:21,677 INFO L225 Difference]: With dead ends: 3168 [2022-04-06 22:21:21,677 INFO L226 Difference]: Without dead ends: 3159 [2022-04-06 22:21:21,678 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1098 GetRequests, 1013 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=3251, Invalid=4231, Unknown=0, NotChecked=0, Total=7482 [2022-04-06 22:21:21,678 INFO L913 BasicCegarLoop]: 113 mSDtfsCounter, 109 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 22:21:21,678 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 416 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 22:21:21,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3159 states. [2022-04-06 22:21:22,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3159 to 3157. [2022-04-06 22:21:22,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3157 states, 2049 states have (on average 1.0951683748169838) internal successors, (2244), 2123 states have internal predecessors, (2244), 724 states have call successors, (724), 384 states have call predecessors, (724), 383 states have return successors, (721), 649 states have call predecessors, (721), 721 states have call successors, (721) [2022-04-06 22:21:22,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3157 states to 3157 states and 3689 transitions. [2022-04-06 22:21:22,491 INFO L78 Accepts]: Start accepts. Automaton has 3157 states and 3689 transitions. Word has length 536 [2022-04-06 22:21:22,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:21:22,491 INFO L478 AbstractCegarLoop]: Abstraction has 3157 states and 3689 transitions. [2022-04-06 22:21:22,491 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 6.483870967741935) internal successors, (201), 30 states have internal predecessors, (201), 30 states have call successors, (86), 30 states have call predecessors, (86), 28 states have return successors, (84), 28 states have call predecessors, (84), 29 states have call successors, (84) [2022-04-06 22:21:22,491 INFO L276 IsEmpty]: Start isEmpty. Operand 3157 states and 3689 transitions. [2022-04-06 22:21:22,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 556 [2022-04-06 22:21:22,497 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:21:22,497 INFO L499 BasicCegarLoop]: trace histogram [85, 84, 84, 29, 28, 28, 28, 28, 28, 28, 28, 28, 28, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:21:22,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-04-06 22:21:22,697 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,SelfDestructingSolverStorable58 [2022-04-06 22:21:22,697 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:21:22,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:21:22,697 INFO L85 PathProgramCache]: Analyzing trace with hash 284015137, now seen corresponding path program 55 times [2022-04-06 22:21:22,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:21:22,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [382166067] [2022-04-06 22:21:22,698 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:21:22,698 INFO L85 PathProgramCache]: Analyzing trace with hash 284015137, now seen corresponding path program 56 times [2022-04-06 22:21:22,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:21:22,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725097179] [2022-04-06 22:21:22,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:21:22,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:21:22,707 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:21:22,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1822504458] [2022-04-06 22:21:22,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:21:22,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:21:22,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:21:22,709 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) [2022-04-06 22:21:22,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-04-06 22:21:22,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:21:22,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:21:22,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 1219 conjuncts, 61 conjunts are in the unsatisfiable core [2022-04-06 22:21:22,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:21:23,833 INFO L134 CoverageAnalysis]: Checked inductivity of 16818 backedges. 168 proven. 16310 refuted. 0 times theorem prover too weak. 340 trivial. 0 not checked. [2022-04-06 22:21:23,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:21:25,222 INFO L134 CoverageAnalysis]: Checked inductivity of 16818 backedges. 168 proven. 2702 refuted. 0 times theorem prover too weak. 13948 trivial. 0 not checked. [2022-04-06 22:21:25,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:21:25,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725097179] [2022-04-06 22:21:25,223 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:21:25,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822504458] [2022-04-06 22:21:25,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822504458] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:21:25,223 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:21:25,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 62 [2022-04-06 22:21:25,223 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:21:25,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [382166067] [2022-04-06 22:21:25,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [382166067] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:21:25,223 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:21:25,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-04-06 22:21:25,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325075181] [2022-04-06 22:21:25,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:21:25,224 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-04-06 22:21:25,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:21:25,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-04-06 22:21:25,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1775, Invalid=2007, Unknown=0, NotChecked=0, Total=3782 [2022-04-06 22:21:25,225 INFO L87 Difference]: Start difference. First operand 3157 states and 3689 transitions. Second operand has 32 states, 32 states have (on average 6.5) internal successors, (208), 31 states have internal predecessors, (208), 31 states have call successors, (89), 31 states have call predecessors, (89), 29 states have return successors, (87), 29 states have call predecessors, (87), 30 states have call successors, (87) [2022-04-06 22:21:26,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:21:26,625 INFO L93 Difference]: Finished difference Result 3286 states and 3850 transitions. [2022-04-06 22:21:26,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-04-06 22:21:26,625 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 6.5) internal successors, (208), 31 states have internal predecessors, (208), 31 states have call successors, (89), 31 states have call predecessors, (89), 29 states have return successors, (87), 29 states have call predecessors, (87), 30 states have call successors, (87) Word has length 555 [2022-04-06 22:21:26,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:21:26,631 INFO L225 Difference]: With dead ends: 3286 [2022-04-06 22:21:26,631 INFO L226 Difference]: Without dead ends: 3277 [2022-04-06 22:21:26,632 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1137 GetRequests, 1049 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3483, Invalid=4527, Unknown=0, NotChecked=0, Total=8010 [2022-04-06 22:21:26,632 INFO L913 BasicCegarLoop]: 116 mSDtfsCounter, 121 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 22:21:26,633 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 438 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 22:21:26,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3277 states. [2022-04-06 22:21:27,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3277 to 3275. [2022-04-06 22:21:27,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3275 states, 2125 states have (on average 1.0950588235294119) internal successors, (2327), 2202 states have internal predecessors, (2327), 752 states have call successors, (752), 398 states have call predecessors, (752), 397 states have return successors, (749), 674 states have call predecessors, (749), 749 states have call successors, (749) [2022-04-06 22:21:27,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3275 states to 3275 states and 3828 transitions. [2022-04-06 22:21:27,475 INFO L78 Accepts]: Start accepts. Automaton has 3275 states and 3828 transitions. Word has length 555 [2022-04-06 22:21:27,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:21:27,475 INFO L478 AbstractCegarLoop]: Abstraction has 3275 states and 3828 transitions. [2022-04-06 22:21:27,475 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 6.5) internal successors, (208), 31 states have internal predecessors, (208), 31 states have call successors, (89), 31 states have call predecessors, (89), 29 states have return successors, (87), 29 states have call predecessors, (87), 30 states have call successors, (87) [2022-04-06 22:21:27,475 INFO L276 IsEmpty]: Start isEmpty. Operand 3275 states and 3828 transitions. [2022-04-06 22:21:27,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 575 [2022-04-06 22:21:27,481 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:21:27,481 INFO L499 BasicCegarLoop]: trace histogram [88, 87, 87, 30, 29, 29, 29, 29, 29, 29, 29, 29, 29, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:21:27,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-04-06 22:21:27,681 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,SelfDestructingSolverStorable59 [2022-04-06 22:21:27,681 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:21:27,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:21:27,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1854300370, now seen corresponding path program 57 times [2022-04-06 22:21:27,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:21:27,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1832975887] [2022-04-06 22:21:27,682 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:21:27,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1854300370, now seen corresponding path program 58 times [2022-04-06 22:21:27,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:21:27,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168851337] [2022-04-06 22:21:27,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:21:27,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:21:27,692 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:21:27,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1627778433] [2022-04-06 22:21:27,692 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 22:21:27,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:21:27,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:21:27,693 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) [2022-04-06 22:21:27,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-04-06 22:21:27,852 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 22:21:27,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:21:27,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 1259 conjuncts, 63 conjunts are in the unsatisfiable core [2022-04-06 22:21:27,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:21:28,844 INFO L134 CoverageAnalysis]: Checked inductivity of 18042 backedges. 174 proven. 17516 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2022-04-06 22:21:28,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:21:30,266 INFO L134 CoverageAnalysis]: Checked inductivity of 18042 backedges. 174 proven. 2900 refuted. 0 times theorem prover too weak. 14968 trivial. 0 not checked. [2022-04-06 22:21:30,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:21:30,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168851337] [2022-04-06 22:21:30,267 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:21:30,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627778433] [2022-04-06 22:21:30,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627778433] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:21:30,267 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:21:30,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 64 [2022-04-06 22:21:30,267 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:21:30,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1832975887] [2022-04-06 22:21:30,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1832975887] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:21:30,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:21:30,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-04-06 22:21:30,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116562245] [2022-04-06 22:21:30,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:21:30,268 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-06 22:21:30,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:21:30,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-06 22:21:30,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1896, Invalid=2136, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 22:21:30,269 INFO L87 Difference]: Start difference. First operand 3275 states and 3828 transitions. Second operand has 33 states, 33 states have (on average 6.515151515151516) internal successors, (215), 32 states have internal predecessors, (215), 32 states have call successors, (92), 32 states have call predecessors, (92), 30 states have return successors, (90), 30 states have call predecessors, (90), 31 states have call successors, (90) [2022-04-06 22:21:31,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:21:31,777 INFO L93 Difference]: Finished difference Result 3404 states and 3989 transitions. [2022-04-06 22:21:31,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-04-06 22:21:31,777 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 6.515151515151516) internal successors, (215), 32 states have internal predecessors, (215), 32 states have call successors, (92), 32 states have call predecessors, (92), 30 states have return successors, (90), 30 states have call predecessors, (90), 31 states have call successors, (90) Word has length 574 [2022-04-06 22:21:31,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:21:31,783 INFO L225 Difference]: With dead ends: 3404 [2022-04-06 22:21:31,783 INFO L226 Difference]: Without dead ends: 3395 [2022-04-06 22:21:31,784 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1176 GetRequests, 1085 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3723, Invalid=4833, Unknown=0, NotChecked=0, Total=8556 [2022-04-06 22:21:31,784 INFO L913 BasicCegarLoop]: 119 mSDtfsCounter, 159 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 22:21:31,784 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 450 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 22:21:31,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3395 states. [2022-04-06 22:21:32,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3395 to 3393. [2022-04-06 22:21:32,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3393 states, 2201 states have (on average 1.0949568378009995) internal successors, (2410), 2281 states have internal predecessors, (2410), 780 states have call successors, (780), 412 states have call predecessors, (780), 411 states have return successors, (777), 699 states have call predecessors, (777), 777 states have call successors, (777) [2022-04-06 22:21:32,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3393 states to 3393 states and 3967 transitions. [2022-04-06 22:21:32,654 INFO L78 Accepts]: Start accepts. Automaton has 3393 states and 3967 transitions. Word has length 574 [2022-04-06 22:21:32,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:21:32,654 INFO L478 AbstractCegarLoop]: Abstraction has 3393 states and 3967 transitions. [2022-04-06 22:21:32,654 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 6.515151515151516) internal successors, (215), 32 states have internal predecessors, (215), 32 states have call successors, (92), 32 states have call predecessors, (92), 30 states have return successors, (90), 30 states have call predecessors, (90), 31 states have call successors, (90) [2022-04-06 22:21:32,654 INFO L276 IsEmpty]: Start isEmpty. Operand 3393 states and 3967 transitions. [2022-04-06 22:21:32,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 594 [2022-04-06 22:21:32,660 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:21:32,660 INFO L499 BasicCegarLoop]: trace histogram [91, 90, 90, 31, 30, 30, 30, 30, 30, 30, 30, 30, 30, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:21:32,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-04-06 22:21:32,860 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:21:32,861 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:21:32,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:21:32,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1372926593, now seen corresponding path program 59 times [2022-04-06 22:21:32,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:21:32,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1151545435] [2022-04-06 22:21:32,862 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:21:32,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1372926593, now seen corresponding path program 60 times [2022-04-06 22:21:32,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:21:32,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973711747] [2022-04-06 22:21:32,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:21:32,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:21:32,872 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:21:32,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2074136437] [2022-04-06 22:21:32,872 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 22:21:32,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:21:32,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:21:32,873 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) [2022-04-06 22:21:32,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-04-06 22:22:42,272 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 57 check-sat command(s) [2022-04-06 22:22:42,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:22:42,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 1272 conjuncts, 65 conjunts are in the unsatisfiable core [2022-04-06 22:22:42,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:22:43,367 INFO L134 CoverageAnalysis]: Checked inductivity of 19309 backedges. 180 proven. 18765 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-04-06 22:22:43,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:22:44,914 INFO L134 CoverageAnalysis]: Checked inductivity of 19309 backedges. 180 proven. 3105 refuted. 0 times theorem prover too weak. 16024 trivial. 0 not checked. [2022-04-06 22:22:44,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:22:44,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973711747] [2022-04-06 22:22:44,915 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:22:44,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074136437] [2022-04-06 22:22:44,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074136437] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:22:44,915 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:22:44,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 66 [2022-04-06 22:22:44,915 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:22:44,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1151545435] [2022-04-06 22:22:44,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1151545435] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:22:44,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:22:44,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-04-06 22:22:44,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978064114] [2022-04-06 22:22:44,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:22:44,916 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-04-06 22:22:44,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:22:44,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-04-06 22:22:44,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2021, Invalid=2269, Unknown=0, NotChecked=0, Total=4290 [2022-04-06 22:22:44,917 INFO L87 Difference]: Start difference. First operand 3393 states and 3967 transitions. Second operand has 34 states, 34 states have (on average 6.529411764705882) internal successors, (222), 33 states have internal predecessors, (222), 33 states have call successors, (95), 33 states have call predecessors, (95), 31 states have return successors, (93), 31 states have call predecessors, (93), 32 states have call successors, (93) [2022-04-06 22:22:46,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:22:46,462 INFO L93 Difference]: Finished difference Result 3522 states and 4128 transitions. [2022-04-06 22:22:46,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-04-06 22:22:46,462 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 6.529411764705882) internal successors, (222), 33 states have internal predecessors, (222), 33 states have call successors, (95), 33 states have call predecessors, (95), 31 states have return successors, (93), 31 states have call predecessors, (93), 32 states have call successors, (93) Word has length 593 [2022-04-06 22:22:46,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:22:46,469 INFO L225 Difference]: With dead ends: 3522 [2022-04-06 22:22:46,469 INFO L226 Difference]: Without dead ends: 3513 [2022-04-06 22:22:46,470 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1215 GetRequests, 1121 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3971, Invalid=5149, Unknown=0, NotChecked=0, Total=9120 [2022-04-06 22:22:46,470 INFO L913 BasicCegarLoop]: 122 mSDtfsCounter, 81 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 22:22:46,470 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 502 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 22:22:46,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3513 states. [2022-04-06 22:22:47,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3513 to 3511. [2022-04-06 22:22:47,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3511 states, 2277 states have (on average 1.0948616600790513) internal successors, (2493), 2360 states have internal predecessors, (2493), 808 states have call successors, (808), 426 states have call predecessors, (808), 425 states have return successors, (805), 724 states have call predecessors, (805), 805 states have call successors, (805) [2022-04-06 22:22:47,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3511 states to 3511 states and 4106 transitions. [2022-04-06 22:22:47,399 INFO L78 Accepts]: Start accepts. Automaton has 3511 states and 4106 transitions. Word has length 593 [2022-04-06 22:22:47,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:22:47,399 INFO L478 AbstractCegarLoop]: Abstraction has 3511 states and 4106 transitions. [2022-04-06 22:22:47,400 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 6.529411764705882) internal successors, (222), 33 states have internal predecessors, (222), 33 states have call successors, (95), 33 states have call predecessors, (95), 31 states have return successors, (93), 31 states have call predecessors, (93), 32 states have call successors, (93) [2022-04-06 22:22:47,400 INFO L276 IsEmpty]: Start isEmpty. Operand 3511 states and 4106 transitions. [2022-04-06 22:22:47,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 613 [2022-04-06 22:22:47,406 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:22:47,406 INFO L499 BasicCegarLoop]: trace histogram [94, 93, 93, 32, 31, 31, 31, 31, 31, 31, 31, 31, 31, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:22:47,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-04-06 22:22:47,611 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:22:47,612 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:22:47,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:22:47,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1466715250, now seen corresponding path program 61 times [2022-04-06 22:22:47,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:22:47,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1575007523] [2022-04-06 22:22:47,612 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:22:47,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1466715250, now seen corresponding path program 62 times [2022-04-06 22:22:47,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:22:47,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385233188] [2022-04-06 22:22:47,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:22:47,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:22:47,622 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:22:47,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1753632947] [2022-04-06 22:22:47,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:22:47,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:22:47,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:22:47,623 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) [2022-04-06 22:22:47,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-04-06 22:22:47,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:22:47,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:22:47,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 1339 conjuncts, 67 conjunts are in the unsatisfiable core [2022-04-06 22:22:47,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:22:48,887 INFO L134 CoverageAnalysis]: Checked inductivity of 20619 backedges. 186 proven. 20057 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2022-04-06 22:22:48,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:22:50,472 INFO L134 CoverageAnalysis]: Checked inductivity of 20619 backedges. 186 proven. 3317 refuted. 0 times theorem prover too weak. 17116 trivial. 0 not checked. [2022-04-06 22:22:50,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:22:50,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385233188] [2022-04-06 22:22:50,473 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:22:50,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753632947] [2022-04-06 22:22:50,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753632947] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:22:50,473 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:22:50,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 68 [2022-04-06 22:22:50,473 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:22:50,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1575007523] [2022-04-06 22:22:50,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1575007523] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:22:50,473 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:22:50,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-04-06 22:22:50,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270373532] [2022-04-06 22:22:50,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:22:50,474 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-04-06 22:22:50,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:22:50,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-04-06 22:22:50,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2150, Invalid=2406, Unknown=0, NotChecked=0, Total=4556 [2022-04-06 22:22:50,475 INFO L87 Difference]: Start difference. First operand 3511 states and 4106 transitions. Second operand has 35 states, 35 states have (on average 6.542857142857143) internal successors, (229), 34 states have internal predecessors, (229), 34 states have call successors, (98), 34 states have call predecessors, (98), 32 states have return successors, (96), 32 states have call predecessors, (96), 33 states have call successors, (96) [2022-04-06 22:22:52,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:22:52,090 INFO L93 Difference]: Finished difference Result 3640 states and 4267 transitions. [2022-04-06 22:22:52,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-04-06 22:22:52,091 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 6.542857142857143) internal successors, (229), 34 states have internal predecessors, (229), 34 states have call successors, (98), 34 states have call predecessors, (98), 32 states have return successors, (96), 32 states have call predecessors, (96), 33 states have call successors, (96) Word has length 612 [2022-04-06 22:22:52,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:22:52,097 INFO L225 Difference]: With dead ends: 3640 [2022-04-06 22:22:52,097 INFO L226 Difference]: Without dead ends: 3631 [2022-04-06 22:22:52,098 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1254 GetRequests, 1157 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=4227, Invalid=5475, Unknown=0, NotChecked=0, Total=9702 [2022-04-06 22:22:52,098 INFO L913 BasicCegarLoop]: 125 mSDtfsCounter, 133 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 22:22:52,098 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 474 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 22:22:52,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3631 states. [2022-04-06 22:22:53,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3631 to 3629. [2022-04-06 22:22:53,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3629 states, 2353 states have (on average 1.094772630684233) internal successors, (2576), 2439 states have internal predecessors, (2576), 836 states have call successors, (836), 440 states have call predecessors, (836), 439 states have return successors, (833), 749 states have call predecessors, (833), 833 states have call successors, (833) [2022-04-06 22:22:53,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3629 states to 3629 states and 4245 transitions. [2022-04-06 22:22:53,034 INFO L78 Accepts]: Start accepts. Automaton has 3629 states and 4245 transitions. Word has length 612 [2022-04-06 22:22:53,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:22:53,035 INFO L478 AbstractCegarLoop]: Abstraction has 3629 states and 4245 transitions. [2022-04-06 22:22:53,035 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 6.542857142857143) internal successors, (229), 34 states have internal predecessors, (229), 34 states have call successors, (98), 34 states have call predecessors, (98), 32 states have return successors, (96), 32 states have call predecessors, (96), 33 states have call successors, (96) [2022-04-06 22:22:53,035 INFO L276 IsEmpty]: Start isEmpty. Operand 3629 states and 4245 transitions. [2022-04-06 22:22:53,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 632 [2022-04-06 22:22:53,041 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:22:53,041 INFO L499 BasicCegarLoop]: trace histogram [97, 96, 96, 33, 32, 32, 32, 32, 32, 32, 32, 32, 32, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:22:53,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-04-06 22:22:53,243 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:22:53,243 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:22:53,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:22:53,244 INFO L85 PathProgramCache]: Analyzing trace with hash -2118163743, now seen corresponding path program 63 times [2022-04-06 22:22:53,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:22:53,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1295935536] [2022-04-06 22:22:53,244 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:22:53,245 INFO L85 PathProgramCache]: Analyzing trace with hash -2118163743, now seen corresponding path program 64 times [2022-04-06 22:22:53,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:22:53,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876996973] [2022-04-06 22:22:53,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:22:53,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:22:53,255 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:22:53,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [829637278] [2022-04-06 22:22:53,255 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 22:22:53,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:22:53,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:22:53,256 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) [2022-04-06 22:22:53,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-04-06 22:22:53,429 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 22:22:53,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:22:53,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 1379 conjuncts, 69 conjunts are in the unsatisfiable core [2022-04-06 22:22:53,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:22:54,608 INFO L134 CoverageAnalysis]: Checked inductivity of 21972 backedges. 192 proven. 21392 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2022-04-06 22:22:54,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:22:56,219 INFO L134 CoverageAnalysis]: Checked inductivity of 21972 backedges. 192 proven. 3536 refuted. 0 times theorem prover too weak. 18244 trivial. 0 not checked. [2022-04-06 22:22:56,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:22:56,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876996973] [2022-04-06 22:22:56,219 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:22:56,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829637278] [2022-04-06 22:22:56,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829637278] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:22:56,219 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:22:56,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 70 [2022-04-06 22:22:56,220 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:22:56,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1295935536] [2022-04-06 22:22:56,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1295935536] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:22:56,220 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:22:56,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-04-06 22:22:56,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215621304] [2022-04-06 22:22:56,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:22:56,220 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-04-06 22:22:56,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:22:56,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-04-06 22:22:56,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2283, Invalid=2547, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 22:22:56,222 INFO L87 Difference]: Start difference. First operand 3629 states and 4245 transitions. Second operand has 36 states, 36 states have (on average 6.555555555555555) internal successors, (236), 35 states have internal predecessors, (236), 35 states have call successors, (101), 35 states have call predecessors, (101), 33 states have return successors, (99), 33 states have call predecessors, (99), 34 states have call successors, (99) [2022-04-06 22:22:57,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:22:57,902 INFO L93 Difference]: Finished difference Result 3758 states and 4406 transitions. [2022-04-06 22:22:57,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-04-06 22:22:57,903 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 6.555555555555555) internal successors, (236), 35 states have internal predecessors, (236), 35 states have call successors, (101), 35 states have call predecessors, (101), 33 states have return successors, (99), 33 states have call predecessors, (99), 34 states have call successors, (99) Word has length 631 [2022-04-06 22:22:57,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:22:57,910 INFO L225 Difference]: With dead ends: 3758 [2022-04-06 22:22:57,910 INFO L226 Difference]: Without dead ends: 3749 [2022-04-06 22:22:57,912 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1293 GetRequests, 1193 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=4491, Invalid=5811, Unknown=0, NotChecked=0, Total=10302 [2022-04-06 22:22:57,912 INFO L913 BasicCegarLoop]: 128 mSDtfsCounter, 109 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 22:22:57,912 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 506 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 22:22:57,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3749 states. [2022-04-06 22:22:58,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3749 to 3747. [2022-04-06 22:22:58,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3747 states, 2429 states have (on average 1.0946891724989707) internal successors, (2659), 2518 states have internal predecessors, (2659), 864 states have call successors, (864), 454 states have call predecessors, (864), 453 states have return successors, (861), 774 states have call predecessors, (861), 861 states have call successors, (861) [2022-04-06 22:22:58,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3747 states to 3747 states and 4384 transitions. [2022-04-06 22:22:58,899 INFO L78 Accepts]: Start accepts. Automaton has 3747 states and 4384 transitions. Word has length 631 [2022-04-06 22:22:58,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:22:58,900 INFO L478 AbstractCegarLoop]: Abstraction has 3747 states and 4384 transitions. [2022-04-06 22:22:58,900 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 6.555555555555555) internal successors, (236), 35 states have internal predecessors, (236), 35 states have call successors, (101), 35 states have call predecessors, (101), 33 states have return successors, (99), 33 states have call predecessors, (99), 34 states have call successors, (99) [2022-04-06 22:22:58,900 INFO L276 IsEmpty]: Start isEmpty. Operand 3747 states and 4384 transitions. [2022-04-06 22:22:58,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 651 [2022-04-06 22:22:58,907 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:22:58,907 INFO L499 BasicCegarLoop]: trace histogram [100, 99, 99, 34, 33, 33, 33, 33, 33, 33, 33, 33, 33, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:22:58,925 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-04-06 22:22:59,107 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:22:59,108 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:22:59,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:22:59,108 INFO L85 PathProgramCache]: Analyzing trace with hash -266043374, now seen corresponding path program 65 times [2022-04-06 22:22:59,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:22:59,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1444065555] [2022-04-06 22:22:59,108 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:22:59,109 INFO L85 PathProgramCache]: Analyzing trace with hash -266043374, now seen corresponding path program 66 times [2022-04-06 22:22:59,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:22:59,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838245010] [2022-04-06 22:22:59,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:22:59,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:22:59,119 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:22:59,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1439109784] [2022-04-06 22:22:59,120 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 22:22:59,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:22:59,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:22:59,123 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) [2022-04-06 22:22:59,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-04-06 22:22:59,578 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 62 check-sat command(s) [2022-04-06 22:22:59,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:22:59,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 1410 conjuncts, 71 conjunts are in the unsatisfiable core [2022-04-06 22:22:59,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:23:00,754 INFO L134 CoverageAnalysis]: Checked inductivity of 23368 backedges. 198 proven. 22770 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-04-06 22:23:00,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:23:02,524 INFO L134 CoverageAnalysis]: Checked inductivity of 23368 backedges. 198 proven. 3762 refuted. 0 times theorem prover too weak. 19408 trivial. 0 not checked. [2022-04-06 22:23:02,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:23:02,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838245010] [2022-04-06 22:23:02,524 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:23:02,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439109784] [2022-04-06 22:23:02,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439109784] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:23:02,524 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:23:02,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 72 [2022-04-06 22:23:02,525 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:23:02,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1444065555] [2022-04-06 22:23:02,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1444065555] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:23:02,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:23:02,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-04-06 22:23:02,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167306273] [2022-04-06 22:23:02,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:23:02,526 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-04-06 22:23:02,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:23:02,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-04-06 22:23:02,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2420, Invalid=2692, Unknown=0, NotChecked=0, Total=5112 [2022-04-06 22:23:02,527 INFO L87 Difference]: Start difference. First operand 3747 states and 4384 transitions. Second operand has 37 states, 37 states have (on average 6.5675675675675675) internal successors, (243), 36 states have internal predecessors, (243), 36 states have call successors, (104), 36 states have call predecessors, (104), 34 states have return successors, (102), 34 states have call predecessors, (102), 35 states have call successors, (102) [2022-04-06 22:23:04,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:23:04,260 INFO L93 Difference]: Finished difference Result 3876 states and 4545 transitions. [2022-04-06 22:23:04,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-04-06 22:23:04,260 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 6.5675675675675675) internal successors, (243), 36 states have internal predecessors, (243), 36 states have call successors, (104), 36 states have call predecessors, (104), 34 states have return successors, (102), 34 states have call predecessors, (102), 35 states have call successors, (102) Word has length 650 [2022-04-06 22:23:04,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:23:04,267 INFO L225 Difference]: With dead ends: 3876 [2022-04-06 22:23:04,267 INFO L226 Difference]: Without dead ends: 3867 [2022-04-06 22:23:04,268 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1332 GetRequests, 1229 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4763, Invalid=6157, Unknown=0, NotChecked=0, Total=10920 [2022-04-06 22:23:04,268 INFO L913 BasicCegarLoop]: 131 mSDtfsCounter, 105 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 22:23:04,268 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 518 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 22:23:04,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3867 states. [2022-04-06 22:23:05,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3867 to 3865. [2022-04-06 22:23:05,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3865 states, 2505 states have (on average 1.0946107784431138) internal successors, (2742), 2597 states have internal predecessors, (2742), 892 states have call successors, (892), 468 states have call predecessors, (892), 467 states have return successors, (889), 799 states have call predecessors, (889), 889 states have call successors, (889) [2022-04-06 22:23:05,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3865 states to 3865 states and 4523 transitions. [2022-04-06 22:23:05,283 INFO L78 Accepts]: Start accepts. Automaton has 3865 states and 4523 transitions. Word has length 650 [2022-04-06 22:23:05,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:23:05,284 INFO L478 AbstractCegarLoop]: Abstraction has 3865 states and 4523 transitions. [2022-04-06 22:23:05,284 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 6.5675675675675675) internal successors, (243), 36 states have internal predecessors, (243), 36 states have call successors, (104), 36 states have call predecessors, (104), 34 states have return successors, (102), 34 states have call predecessors, (102), 35 states have call successors, (102) [2022-04-06 22:23:05,284 INFO L276 IsEmpty]: Start isEmpty. Operand 3865 states and 4523 transitions. [2022-04-06 22:23:05,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 670 [2022-04-06 22:23:05,291 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:23:05,291 INFO L499 BasicCegarLoop]: trace histogram [103, 102, 102, 35, 34, 34, 34, 34, 34, 34, 34, 34, 34, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:23:05,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-04-06 22:23:05,503 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,SelfDestructingSolverStorable64 [2022-04-06 22:23:05,504 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:23:05,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:23:05,504 INFO L85 PathProgramCache]: Analyzing trace with hash 14830401, now seen corresponding path program 67 times [2022-04-06 22:23:05,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:23:05,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [843753384] [2022-04-06 22:23:05,505 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:23:05,505 INFO L85 PathProgramCache]: Analyzing trace with hash 14830401, now seen corresponding path program 68 times [2022-04-06 22:23:05,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:23:05,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913009750] [2022-04-06 22:23:05,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:23:05,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:23:05,515 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:23:05,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1161274735] [2022-04-06 22:23:05,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:23:05,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:23:05,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:23:05,516 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) [2022-04-06 22:23:05,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-04-06 22:23:05,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:23:05,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:23:05,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 1459 conjuncts, 73 conjunts are in the unsatisfiable core [2022-04-06 22:23:05,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:23:06,936 INFO L134 CoverageAnalysis]: Checked inductivity of 24807 backedges. 204 proven. 24191 refuted. 0 times theorem prover too weak. 412 trivial. 0 not checked. [2022-04-06 22:23:06,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:23:08,771 INFO L134 CoverageAnalysis]: Checked inductivity of 24807 backedges. 204 proven. 3995 refuted. 0 times theorem prover too weak. 20608 trivial. 0 not checked. [2022-04-06 22:23:08,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:23:08,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913009750] [2022-04-06 22:23:08,772 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:23:08,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161274735] [2022-04-06 22:23:08,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161274735] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:23:08,772 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:23:08,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 74 [2022-04-06 22:23:08,772 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:23:08,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [843753384] [2022-04-06 22:23:08,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [843753384] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:23:08,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:23:08,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-04-06 22:23:08,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321232180] [2022-04-06 22:23:08,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:23:08,773 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-04-06 22:23:08,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:23:08,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-04-06 22:23:08,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2561, Invalid=2841, Unknown=0, NotChecked=0, Total=5402 [2022-04-06 22:23:08,774 INFO L87 Difference]: Start difference. First operand 3865 states and 4523 transitions. Second operand has 38 states, 38 states have (on average 6.578947368421052) internal successors, (250), 37 states have internal predecessors, (250), 37 states have call successors, (107), 37 states have call predecessors, (107), 35 states have return successors, (105), 35 states have call predecessors, (105), 36 states have call successors, (105) [2022-04-06 22:23:10,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:23:10,652 INFO L93 Difference]: Finished difference Result 3994 states and 4684 transitions. [2022-04-06 22:23:10,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-04-06 22:23:10,653 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 6.578947368421052) internal successors, (250), 37 states have internal predecessors, (250), 37 states have call successors, (107), 37 states have call predecessors, (107), 35 states have return successors, (105), 35 states have call predecessors, (105), 36 states have call successors, (105) Word has length 669 [2022-04-06 22:23:10,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:23:10,659 INFO L225 Difference]: With dead ends: 3994 [2022-04-06 22:23:10,659 INFO L226 Difference]: Without dead ends: 3985 [2022-04-06 22:23:10,661 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1371 GetRequests, 1265 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=5043, Invalid=6513, Unknown=0, NotChecked=0, Total=11556 [2022-04-06 22:23:10,661 INFO L913 BasicCegarLoop]: 134 mSDtfsCounter, 147 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 22:23:10,661 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 540 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 22:23:10,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3985 states. [2022-04-06 22:23:11,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3985 to 3983. [2022-04-06 22:23:11,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3983 states, 2581 states have (on average 1.09453700116234) internal successors, (2825), 2676 states have internal predecessors, (2825), 920 states have call successors, (920), 482 states have call predecessors, (920), 481 states have return successors, (917), 824 states have call predecessors, (917), 917 states have call successors, (917) [2022-04-06 22:23:11,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3983 states to 3983 states and 4662 transitions. [2022-04-06 22:23:11,712 INFO L78 Accepts]: Start accepts. Automaton has 3983 states and 4662 transitions. Word has length 669 [2022-04-06 22:23:11,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:23:11,712 INFO L478 AbstractCegarLoop]: Abstraction has 3983 states and 4662 transitions. [2022-04-06 22:23:11,713 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 6.578947368421052) internal successors, (250), 37 states have internal predecessors, (250), 37 states have call successors, (107), 37 states have call predecessors, (107), 35 states have return successors, (105), 35 states have call predecessors, (105), 36 states have call successors, (105) [2022-04-06 22:23:11,713 INFO L276 IsEmpty]: Start isEmpty. Operand 3983 states and 4662 transitions. [2022-04-06 22:23:11,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 689 [2022-04-06 22:23:11,720 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:23:11,720 INFO L499 BasicCegarLoop]: trace histogram [106, 105, 105, 36, 35, 35, 35, 35, 35, 35, 35, 35, 35, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:23:11,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-04-06 22:23:11,926 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:23:11,926 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:23:11,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:23:11,926 INFO L85 PathProgramCache]: Analyzing trace with hash 280558514, now seen corresponding path program 69 times [2022-04-06 22:23:11,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:23:11,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2122376610] [2022-04-06 22:23:11,927 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:23:11,927 INFO L85 PathProgramCache]: Analyzing trace with hash 280558514, now seen corresponding path program 70 times [2022-04-06 22:23:11,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:23:11,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5359613] [2022-04-06 22:23:11,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:23:11,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:23:11,938 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:23:11,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1487287281] [2022-04-06 22:23:11,938 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 22:23:11,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:23:11,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:23:11,939 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:23:11,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-04-06 22:23:12,137 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 22:23:12,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:23:12,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 1499 conjuncts, 75 conjunts are in the unsatisfiable core [2022-04-06 22:23:12,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:23:13,378 INFO L134 CoverageAnalysis]: Checked inductivity of 26289 backedges. 210 proven. 25655 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2022-04-06 22:23:13,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:23:15,357 INFO L134 CoverageAnalysis]: Checked inductivity of 26289 backedges. 210 proven. 4235 refuted. 0 times theorem prover too weak. 21844 trivial. 0 not checked. [2022-04-06 22:23:15,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:23:15,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5359613] [2022-04-06 22:23:15,358 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:23:15,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487287281] [2022-04-06 22:23:15,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487287281] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:23:15,358 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:23:15,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 76 [2022-04-06 22:23:15,358 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:23:15,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2122376610] [2022-04-06 22:23:15,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2122376610] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:23:15,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:23:15,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-04-06 22:23:15,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124148735] [2022-04-06 22:23:15,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:23:15,359 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-04-06 22:23:15,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:23:15,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-04-06 22:23:15,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2706, Invalid=2994, Unknown=0, NotChecked=0, Total=5700 [2022-04-06 22:23:15,360 INFO L87 Difference]: Start difference. First operand 3983 states and 4662 transitions. Second operand has 39 states, 39 states have (on average 6.589743589743589) internal successors, (257), 38 states have internal predecessors, (257), 38 states have call successors, (110), 38 states have call predecessors, (110), 36 states have return successors, (108), 36 states have call predecessors, (108), 37 states have call successors, (108) [2022-04-06 22:23:17,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:23:17,256 INFO L93 Difference]: Finished difference Result 4112 states and 4823 transitions. [2022-04-06 22:23:17,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-04-06 22:23:17,256 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 6.589743589743589) internal successors, (257), 38 states have internal predecessors, (257), 38 states have call successors, (110), 38 states have call predecessors, (110), 36 states have return successors, (108), 36 states have call predecessors, (108), 37 states have call successors, (108) Word has length 688 [2022-04-06 22:23:17,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:23:17,263 INFO L225 Difference]: With dead ends: 4112 [2022-04-06 22:23:17,263 INFO L226 Difference]: Without dead ends: 4103 [2022-04-06 22:23:17,265 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1410 GetRequests, 1301 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=5331, Invalid=6879, Unknown=0, NotChecked=0, Total=12210 [2022-04-06 22:23:17,265 INFO L913 BasicCegarLoop]: 137 mSDtfsCounter, 130 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 22:23:17,265 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 552 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 22:23:17,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4103 states. [2022-04-06 22:23:18,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4103 to 4101. [2022-04-06 22:23:18,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4101 states, 2657 states have (on average 1.0944674444862628) internal successors, (2908), 2755 states have internal predecessors, (2908), 948 states have call successors, (948), 496 states have call predecessors, (948), 495 states have return successors, (945), 849 states have call predecessors, (945), 945 states have call successors, (945) [2022-04-06 22:23:18,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4101 states to 4101 states and 4801 transitions. [2022-04-06 22:23:18,327 INFO L78 Accepts]: Start accepts. Automaton has 4101 states and 4801 transitions. Word has length 688 [2022-04-06 22:23:18,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:23:18,328 INFO L478 AbstractCegarLoop]: Abstraction has 4101 states and 4801 transitions. [2022-04-06 22:23:18,328 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 6.589743589743589) internal successors, (257), 38 states have internal predecessors, (257), 38 states have call successors, (110), 38 states have call predecessors, (110), 36 states have return successors, (108), 36 states have call predecessors, (108), 37 states have call successors, (108) [2022-04-06 22:23:18,328 INFO L276 IsEmpty]: Start isEmpty. Operand 4101 states and 4801 transitions. [2022-04-06 22:23:18,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 708 [2022-04-06 22:23:18,336 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:23:18,336 INFO L499 BasicCegarLoop]: trace histogram [109, 108, 108, 37, 36, 36, 36, 36, 36, 36, 36, 36, 36, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:23:18,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-04-06 22:23:18,554 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-04-06 22:23:18,555 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:23:18,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:23:18,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1458826145, now seen corresponding path program 71 times [2022-04-06 22:23:18,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:23:18,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1162697010] [2022-04-06 22:23:18,556 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:23:18,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1458826145, now seen corresponding path program 72 times [2022-04-06 22:23:18,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:23:18,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316520631] [2022-04-06 22:23:18,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:23:18,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:23:18,567 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:23:18,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1190704329] [2022-04-06 22:23:18,567 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 22:23:18,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:23:18,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:23:18,568 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:23:18,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-04-06 22:23:19,108 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 70 check-sat command(s) [2022-04-06 22:23:19,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:23:19,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 1530 conjuncts, 77 conjunts are in the unsatisfiable core [2022-04-06 22:23:19,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:23:20,450 INFO L134 CoverageAnalysis]: Checked inductivity of 27814 backedges. 216 proven. 27162 refuted. 0 times theorem prover too weak. 436 trivial. 0 not checked. [2022-04-06 22:23:20,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:23:22,445 INFO L134 CoverageAnalysis]: Checked inductivity of 27814 backedges. 216 proven. 4482 refuted. 0 times theorem prover too weak. 23116 trivial. 0 not checked. [2022-04-06 22:23:22,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:23:22,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316520631] [2022-04-06 22:23:22,446 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:23:22,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190704329] [2022-04-06 22:23:22,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190704329] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:23:22,446 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:23:22,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 78 [2022-04-06 22:23:22,446 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:23:22,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1162697010] [2022-04-06 22:23:22,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1162697010] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:23:22,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:23:22,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-04-06 22:23:22,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108019335] [2022-04-06 22:23:22,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:23:22,447 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-04-06 22:23:22,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:23:22,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-04-06 22:23:22,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2855, Invalid=3151, Unknown=0, NotChecked=0, Total=6006 [2022-04-06 22:23:22,448 INFO L87 Difference]: Start difference. First operand 4101 states and 4801 transitions. Second operand has 40 states, 40 states have (on average 6.6) internal successors, (264), 39 states have internal predecessors, (264), 39 states have call successors, (113), 39 states have call predecessors, (113), 37 states have return successors, (111), 37 states have call predecessors, (111), 38 states have call successors, (111) [2022-04-06 22:23:24,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:23:24,480 INFO L93 Difference]: Finished difference Result 4230 states and 4962 transitions. [2022-04-06 22:23:24,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-04-06 22:23:24,480 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 6.6) internal successors, (264), 39 states have internal predecessors, (264), 39 states have call successors, (113), 39 states have call predecessors, (113), 37 states have return successors, (111), 37 states have call predecessors, (111), 38 states have call successors, (111) Word has length 707 [2022-04-06 22:23:24,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:23:24,487 INFO L225 Difference]: With dead ends: 4230 [2022-04-06 22:23:24,487 INFO L226 Difference]: Without dead ends: 4221 [2022-04-06 22:23:24,488 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1449 GetRequests, 1337 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 739 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=5627, Invalid=7255, Unknown=0, NotChecked=0, Total=12882 [2022-04-06 22:23:24,489 INFO L913 BasicCegarLoop]: 140 mSDtfsCounter, 119 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 22:23:24,489 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 554 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 22:23:24,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4221 states. [2022-04-06 22:23:25,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4221 to 4219. [2022-04-06 22:23:25,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4219 states, 2733 states have (on average 1.0944017563117454) internal successors, (2991), 2834 states have internal predecessors, (2991), 976 states have call successors, (976), 510 states have call predecessors, (976), 509 states have return successors, (973), 874 states have call predecessors, (973), 973 states have call successors, (973) [2022-04-06 22:23:25,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4219 states to 4219 states and 4940 transitions. [2022-04-06 22:23:25,588 INFO L78 Accepts]: Start accepts. Automaton has 4219 states and 4940 transitions. Word has length 707 [2022-04-06 22:23:25,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:23:25,588 INFO L478 AbstractCegarLoop]: Abstraction has 4219 states and 4940 transitions. [2022-04-06 22:23:25,589 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 6.6) internal successors, (264), 39 states have internal predecessors, (264), 39 states have call successors, (113), 39 states have call predecessors, (113), 37 states have return successors, (111), 37 states have call predecessors, (111), 38 states have call successors, (111) [2022-04-06 22:23:25,589 INFO L276 IsEmpty]: Start isEmpty. Operand 4219 states and 4940 transitions. [2022-04-06 22:23:25,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 727 [2022-04-06 22:23:25,596 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:23:25,596 INFO L499 BasicCegarLoop]: trace histogram [112, 111, 111, 38, 37, 37, 37, 37, 37, 37, 37, 37, 37, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:23:25,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-04-06 22:23:25,796 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-04-06 22:23:25,797 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:23:25,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:23:25,797 INFO L85 PathProgramCache]: Analyzing trace with hash 968081234, now seen corresponding path program 73 times [2022-04-06 22:23:25,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:23:25,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1718739688] [2022-04-06 22:23:25,798 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:23:25,798 INFO L85 PathProgramCache]: Analyzing trace with hash 968081234, now seen corresponding path program 74 times [2022-04-06 22:23:25,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:23:25,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900320023] [2022-04-06 22:23:25,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:23:25,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:23:25,809 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:23:25,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [16852765] [2022-04-06 22:23:25,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:23:25,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:23:25,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:23:25,810 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:23:25,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-04-06 22:23:25,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:23:25,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:23:25,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 1579 conjuncts, 79 conjunts are in the unsatisfiable core [2022-04-06 22:23:26,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:23:27,334 INFO L134 CoverageAnalysis]: Checked inductivity of 29382 backedges. 222 proven. 28712 refuted. 0 times theorem prover too weak. 448 trivial. 0 not checked. [2022-04-06 22:23:27,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:23:29,420 INFO L134 CoverageAnalysis]: Checked inductivity of 29382 backedges. 222 proven. 4736 refuted. 0 times theorem prover too weak. 24424 trivial. 0 not checked. [2022-04-06 22:23:29,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:23:29,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900320023] [2022-04-06 22:23:29,420 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:23:29,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16852765] [2022-04-06 22:23:29,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16852765] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:23:29,420 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:23:29,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 80 [2022-04-06 22:23:29,421 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:23:29,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1718739688] [2022-04-06 22:23:29,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1718739688] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:23:29,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:23:29,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-04-06 22:23:29,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414113306] [2022-04-06 22:23:29,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:23:29,421 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-04-06 22:23:29,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:23:29,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-04-06 22:23:29,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3008, Invalid=3312, Unknown=0, NotChecked=0, Total=6320 [2022-04-06 22:23:29,422 INFO L87 Difference]: Start difference. First operand 4219 states and 4940 transitions. Second operand has 41 states, 41 states have (on average 6.609756097560975) internal successors, (271), 40 states have internal predecessors, (271), 40 states have call successors, (116), 40 states have call predecessors, (116), 38 states have return successors, (114), 38 states have call predecessors, (114), 39 states have call successors, (114) [2022-04-06 22:23:31,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:23:31,443 INFO L93 Difference]: Finished difference Result 4348 states and 5101 transitions. [2022-04-06 22:23:31,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-04-06 22:23:31,444 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 6.609756097560975) internal successors, (271), 40 states have internal predecessors, (271), 40 states have call successors, (116), 40 states have call predecessors, (116), 38 states have return successors, (114), 38 states have call predecessors, (114), 39 states have call successors, (114) Word has length 726 [2022-04-06 22:23:31,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:23:31,451 INFO L225 Difference]: With dead ends: 4348 [2022-04-06 22:23:31,451 INFO L226 Difference]: Without dead ends: 4339 [2022-04-06 22:23:31,452 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1488 GetRequests, 1373 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=5931, Invalid=7641, Unknown=0, NotChecked=0, Total=13572 [2022-04-06 22:23:31,453 INFO L913 BasicCegarLoop]: 143 mSDtfsCounter, 190 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 22:23:31,453 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 546 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 22:23:31,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4339 states. [2022-04-06 22:23:32,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4339 to 4337. [2022-04-06 22:23:32,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4337 states, 2809 states have (on average 1.0943396226415094) internal successors, (3074), 2913 states have internal predecessors, (3074), 1004 states have call successors, (1004), 524 states have call predecessors, (1004), 523 states have return successors, (1001), 899 states have call predecessors, (1001), 1001 states have call successors, (1001) [2022-04-06 22:23:32,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4337 states to 4337 states and 5079 transitions. [2022-04-06 22:23:32,594 INFO L78 Accepts]: Start accepts. Automaton has 4337 states and 5079 transitions. Word has length 726 [2022-04-06 22:23:32,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:23:32,594 INFO L478 AbstractCegarLoop]: Abstraction has 4337 states and 5079 transitions. [2022-04-06 22:23:32,594 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 6.609756097560975) internal successors, (271), 40 states have internal predecessors, (271), 40 states have call successors, (116), 40 states have call predecessors, (116), 38 states have return successors, (114), 38 states have call predecessors, (114), 39 states have call successors, (114) [2022-04-06 22:23:32,595 INFO L276 IsEmpty]: Start isEmpty. Operand 4337 states and 5079 transitions. [2022-04-06 22:23:32,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 746 [2022-04-06 22:23:32,602 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:23:32,602 INFO L499 BasicCegarLoop]: trace histogram [115, 114, 114, 39, 38, 38, 38, 38, 38, 38, 38, 38, 38, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:23:32,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-04-06 22:23:32,819 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-04-06 22:23:32,819 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:23:32,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:23:32,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1825946623, now seen corresponding path program 75 times [2022-04-06 22:23:32,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:23:32,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1115710506] [2022-04-06 22:23:32,820 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:23:32,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1825946623, now seen corresponding path program 76 times [2022-04-06 22:23:32,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:23:32,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783229853] [2022-04-06 22:23:32,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:23:32,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:23:32,832 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:23:32,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1456453239] [2022-04-06 22:23:32,832 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 22:23:32,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:23:32,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:23:32,833 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:23:32,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-04-06 22:23:33,054 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 22:23:33,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:23:33,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 1619 conjuncts, 81 conjunts are in the unsatisfiable core [2022-04-06 22:23:33,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:23:34,471 INFO L134 CoverageAnalysis]: Checked inductivity of 30993 backedges. 228 proven. 30305 refuted. 0 times theorem prover too weak. 460 trivial. 0 not checked. [2022-04-06 22:23:34,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:23:36,668 INFO L134 CoverageAnalysis]: Checked inductivity of 30993 backedges. 228 proven. 4997 refuted. 0 times theorem prover too weak. 25768 trivial. 0 not checked. [2022-04-06 22:23:36,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:23:36,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783229853] [2022-04-06 22:23:36,669 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:23:36,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456453239] [2022-04-06 22:23:36,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456453239] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:23:36,669 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:23:36,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 82 [2022-04-06 22:23:36,669 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:23:36,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1115710506] [2022-04-06 22:23:36,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1115710506] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:23:36,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:23:36,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-04-06 22:23:36,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103662279] [2022-04-06 22:23:36,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:23:36,671 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-04-06 22:23:36,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:23:36,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-04-06 22:23:36,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3165, Invalid=3477, Unknown=0, NotChecked=0, Total=6642 [2022-04-06 22:23:36,673 INFO L87 Difference]: Start difference. First operand 4337 states and 5079 transitions. Second operand has 42 states, 42 states have (on average 6.619047619047619) internal successors, (278), 41 states have internal predecessors, (278), 41 states have call successors, (119), 41 states have call predecessors, (119), 39 states have return successors, (117), 39 states have call predecessors, (117), 40 states have call successors, (117) [2022-04-06 22:23:38,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:23:38,851 INFO L93 Difference]: Finished difference Result 4466 states and 5240 transitions. [2022-04-06 22:23:38,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-04-06 22:23:38,852 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 6.619047619047619) internal successors, (278), 41 states have internal predecessors, (278), 41 states have call successors, (119), 41 states have call predecessors, (119), 39 states have return successors, (117), 39 states have call predecessors, (117), 40 states have call successors, (117) Word has length 745 [2022-04-06 22:23:38,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:23:38,859 INFO L225 Difference]: With dead ends: 4466 [2022-04-06 22:23:38,859 INFO L226 Difference]: Without dead ends: 4457 [2022-04-06 22:23:38,861 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1527 GetRequests, 1409 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=6243, Invalid=8037, Unknown=0, NotChecked=0, Total=14280 [2022-04-06 22:23:38,861 INFO L913 BasicCegarLoop]: 146 mSDtfsCounter, 144 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 22:23:38,861 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 578 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 22:23:38,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4457 states. [2022-04-06 22:23:40,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4457 to 4455. [2022-04-06 22:23:40,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4455 states, 2885 states have (on average 1.0942807625649913) internal successors, (3157), 2992 states have internal predecessors, (3157), 1032 states have call successors, (1032), 538 states have call predecessors, (1032), 537 states have return successors, (1029), 924 states have call predecessors, (1029), 1029 states have call successors, (1029) [2022-04-06 22:23:40,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4455 states to 4455 states and 5218 transitions. [2022-04-06 22:23:40,050 INFO L78 Accepts]: Start accepts. Automaton has 4455 states and 5218 transitions. Word has length 745 [2022-04-06 22:23:40,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:23:40,051 INFO L478 AbstractCegarLoop]: Abstraction has 4455 states and 5218 transitions. [2022-04-06 22:23:40,051 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 6.619047619047619) internal successors, (278), 41 states have internal predecessors, (278), 41 states have call successors, (119), 41 states have call predecessors, (119), 39 states have return successors, (117), 39 states have call predecessors, (117), 40 states have call successors, (117) [2022-04-06 22:23:40,051 INFO L276 IsEmpty]: Start isEmpty. Operand 4455 states and 5218 transitions. [2022-04-06 22:23:40,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 765 [2022-04-06 22:23:40,059 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:23:40,059 INFO L499 BasicCegarLoop]: trace histogram [118, 117, 117, 40, 39, 39, 39, 39, 39, 39, 39, 39, 39, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:23:40,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-04-06 22:23:40,279 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-04-06 22:23:40,279 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:23:40,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:23:40,280 INFO L85 PathProgramCache]: Analyzing trace with hash 874433266, now seen corresponding path program 77 times [2022-04-06 22:23:40,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:23:40,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [361117962] [2022-04-06 22:23:40,280 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:23:40,281 INFO L85 PathProgramCache]: Analyzing trace with hash 874433266, now seen corresponding path program 78 times [2022-04-06 22:23:40,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:23:40,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575513696] [2022-04-06 22:23:40,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:23:40,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:23:40,297 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:23:40,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1888284466] [2022-04-06 22:23:40,297 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 22:23:40,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:23:40,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:23:40,298 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:23:40,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-04-06 22:24:01,367 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 78 check-sat command(s) [2022-04-06 22:24:01,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:24:01,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 1659 conjuncts, 83 conjunts are in the unsatisfiable core [2022-04-06 22:24:01,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:24:02,815 INFO L134 CoverageAnalysis]: Checked inductivity of 32647 backedges. 234 proven. 31941 refuted. 0 times theorem prover too weak. 472 trivial. 0 not checked. [2022-04-06 22:24:02,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:24:04,993 INFO L134 CoverageAnalysis]: Checked inductivity of 32647 backedges. 234 proven. 5265 refuted. 0 times theorem prover too weak. 27148 trivial. 0 not checked. [2022-04-06 22:24:04,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:24:04,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575513696] [2022-04-06 22:24:04,994 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:24:04,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888284466] [2022-04-06 22:24:04,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888284466] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:24:04,994 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:24:04,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 84 [2022-04-06 22:24:04,994 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:24:04,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [361117962] [2022-04-06 22:24:04,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [361117962] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:24:04,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:24:04,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-04-06 22:24:04,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481975460] [2022-04-06 22:24:04,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:24:04,995 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-04-06 22:24:04,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:24:04,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-04-06 22:24:04,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3326, Invalid=3646, Unknown=0, NotChecked=0, Total=6972 [2022-04-06 22:24:04,997 INFO L87 Difference]: Start difference. First operand 4455 states and 5218 transitions. Second operand has 43 states, 43 states have (on average 6.627906976744186) internal successors, (285), 42 states have internal predecessors, (285), 42 states have call successors, (122), 42 states have call predecessors, (122), 40 states have return successors, (120), 40 states have call predecessors, (120), 41 states have call successors, (120) [2022-04-06 22:24:07,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:24:07,186 INFO L93 Difference]: Finished difference Result 4584 states and 5379 transitions. [2022-04-06 22:24:07,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-04-06 22:24:07,187 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 6.627906976744186) internal successors, (285), 42 states have internal predecessors, (285), 42 states have call successors, (122), 42 states have call predecessors, (122), 40 states have return successors, (120), 40 states have call predecessors, (120), 41 states have call successors, (120) Word has length 764 [2022-04-06 22:24:07,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:24:07,194 INFO L225 Difference]: With dead ends: 4584 [2022-04-06 22:24:07,194 INFO L226 Difference]: Without dead ends: 4575 [2022-04-06 22:24:07,195 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1566 GetRequests, 1445 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 859 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=6563, Invalid=8443, Unknown=0, NotChecked=0, Total=15006 [2022-04-06 22:24:07,196 INFO L913 BasicCegarLoop]: 149 mSDtfsCounter, 146 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 590 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 22:24:07,196 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 590 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 628 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 22:24:07,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4575 states. [2022-04-06 22:24:08,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4575 to 4573. [2022-04-06 22:24:08,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4573 states, 2961 states have (on average 1.094224924012158) internal successors, (3240), 3071 states have internal predecessors, (3240), 1060 states have call successors, (1060), 552 states have call predecessors, (1060), 551 states have return successors, (1057), 949 states have call predecessors, (1057), 1057 states have call successors, (1057) [2022-04-06 22:24:08,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4573 states to 4573 states and 5357 transitions. [2022-04-06 22:24:08,410 INFO L78 Accepts]: Start accepts. Automaton has 4573 states and 5357 transitions. Word has length 764 [2022-04-06 22:24:08,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:24:08,410 INFO L478 AbstractCegarLoop]: Abstraction has 4573 states and 5357 transitions. [2022-04-06 22:24:08,411 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 6.627906976744186) internal successors, (285), 42 states have internal predecessors, (285), 42 states have call successors, (122), 42 states have call predecessors, (122), 40 states have return successors, (120), 40 states have call predecessors, (120), 41 states have call successors, (120) [2022-04-06 22:24:08,411 INFO L276 IsEmpty]: Start isEmpty. Operand 4573 states and 5357 transitions. [2022-04-06 22:24:08,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 784 [2022-04-06 22:24:08,418 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:24:08,419 INFO L499 BasicCegarLoop]: trace histogram [121, 120, 120, 41, 40, 40, 40, 40, 40, 40, 40, 40, 40, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:24:08,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-04-06 22:24:08,619 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:24:08,619 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:24:08,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:24:08,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1405397919, now seen corresponding path program 79 times [2022-04-06 22:24:08,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:24:08,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1856629813] [2022-04-06 22:24:08,620 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:24:08,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1405397919, now seen corresponding path program 80 times [2022-04-06 22:24:08,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:24:08,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238980572] [2022-04-06 22:24:08,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:24:08,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:24:08,632 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:24:08,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1967575321] [2022-04-06 22:24:08,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:24:08,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:24:08,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:24:08,633 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:24:08,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-04-06 22:24:08,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:24:08,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:24:08,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 1699 conjuncts, 85 conjunts are in the unsatisfiable core [2022-04-06 22:24:08,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:24:10,351 INFO L134 CoverageAnalysis]: Checked inductivity of 34344 backedges. 240 proven. 33620 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-04-06 22:24:10,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:24:12,669 INFO L134 CoverageAnalysis]: Checked inductivity of 34344 backedges. 240 proven. 5540 refuted. 0 times theorem prover too weak. 28564 trivial. 0 not checked. [2022-04-06 22:24:12,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:24:12,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238980572] [2022-04-06 22:24:12,670 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:24:12,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967575321] [2022-04-06 22:24:12,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967575321] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:24:12,670 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:24:12,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 86 [2022-04-06 22:24:12,670 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:24:12,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1856629813] [2022-04-06 22:24:12,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1856629813] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:24:12,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:24:12,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-04-06 22:24:12,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732107405] [2022-04-06 22:24:12,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:24:12,671 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-04-06 22:24:12,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:24:12,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-04-06 22:24:12,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3491, Invalid=3819, Unknown=0, NotChecked=0, Total=7310 [2022-04-06 22:24:12,673 INFO L87 Difference]: Start difference. First operand 4573 states and 5357 transitions. Second operand has 44 states, 44 states have (on average 6.636363636363637) internal successors, (292), 43 states have internal predecessors, (292), 43 states have call successors, (125), 43 states have call predecessors, (125), 41 states have return successors, (123), 41 states have call predecessors, (123), 42 states have call successors, (123) [2022-04-06 22:24:14,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:24:14,927 INFO L93 Difference]: Finished difference Result 4702 states and 5518 transitions. [2022-04-06 22:24:14,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-04-06 22:24:14,928 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 6.636363636363637) internal successors, (292), 43 states have internal predecessors, (292), 43 states have call successors, (125), 43 states have call predecessors, (125), 41 states have return successors, (123), 41 states have call predecessors, (123), 42 states have call successors, (123) Word has length 783 [2022-04-06 22:24:14,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:24:14,935 INFO L225 Difference]: With dead ends: 4702 [2022-04-06 22:24:14,935 INFO L226 Difference]: Without dead ends: 4693 [2022-04-06 22:24:14,936 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1605 GetRequests, 1481 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=6891, Invalid=8859, Unknown=0, NotChecked=0, Total=15750 [2022-04-06 22:24:14,936 INFO L913 BasicCegarLoop]: 152 mSDtfsCounter, 139 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 612 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 22:24:14,937 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 612 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 22:24:14,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4693 states. [2022-04-06 22:24:16,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4693 to 4691. [2022-04-06 22:24:16,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4691 states, 3037 states have (on average 1.0941718801448799) internal successors, (3323), 3150 states have internal predecessors, (3323), 1088 states have call successors, (1088), 566 states have call predecessors, (1088), 565 states have return successors, (1085), 974 states have call predecessors, (1085), 1085 states have call successors, (1085) [2022-04-06 22:24:16,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4691 states to 4691 states and 5496 transitions. [2022-04-06 22:24:16,184 INFO L78 Accepts]: Start accepts. Automaton has 4691 states and 5496 transitions. Word has length 783 [2022-04-06 22:24:16,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:24:16,184 INFO L478 AbstractCegarLoop]: Abstraction has 4691 states and 5496 transitions. [2022-04-06 22:24:16,184 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 6.636363636363637) internal successors, (292), 43 states have internal predecessors, (292), 43 states have call successors, (125), 43 states have call predecessors, (125), 41 states have return successors, (123), 41 states have call predecessors, (123), 42 states have call successors, (123) [2022-04-06 22:24:16,184 INFO L276 IsEmpty]: Start isEmpty. Operand 4691 states and 5496 transitions. [2022-04-06 22:24:16,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 803 [2022-04-06 22:24:16,193 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:24:16,193 INFO L499 BasicCegarLoop]: trace histogram [124, 123, 123, 42, 41, 41, 41, 41, 41, 41, 41, 41, 41, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:24:16,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-04-06 22:24:16,393 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:24:16,393 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:24:16,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:24:16,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1316741486, now seen corresponding path program 81 times [2022-04-06 22:24:16,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:24:16,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1476841832] [2022-04-06 22:24:16,394 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:24:16,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1316741486, now seen corresponding path program 82 times [2022-04-06 22:24:16,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:24:16,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206398611] [2022-04-06 22:24:16,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:24:16,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:24:16,406 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:24:16,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1843986420] [2022-04-06 22:24:16,407 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 22:24:16,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:24:16,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:24:16,407 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:24:16,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-04-06 22:24:16,638 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 22:24:16,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:24:16,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 1739 conjuncts, 87 conjunts are in the unsatisfiable core [2022-04-06 22:24:16,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:24:18,155 INFO L134 CoverageAnalysis]: Checked inductivity of 36084 backedges. 246 proven. 35342 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2022-04-06 22:24:18,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:24:20,531 INFO L134 CoverageAnalysis]: Checked inductivity of 36084 backedges. 246 proven. 5822 refuted. 0 times theorem prover too weak. 30016 trivial. 0 not checked. [2022-04-06 22:24:20,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:24:20,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206398611] [2022-04-06 22:24:20,531 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:24:20,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843986420] [2022-04-06 22:24:20,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843986420] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:24:20,531 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:24:20,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 88 [2022-04-06 22:24:20,532 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:24:20,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1476841832] [2022-04-06 22:24:20,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1476841832] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:24:20,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:24:20,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-04-06 22:24:20,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665189146] [2022-04-06 22:24:20,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:24:20,533 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-04-06 22:24:20,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:24:20,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-04-06 22:24:20,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3660, Invalid=3996, Unknown=0, NotChecked=0, Total=7656 [2022-04-06 22:24:20,534 INFO L87 Difference]: Start difference. First operand 4691 states and 5496 transitions. Second operand has 45 states, 45 states have (on average 6.644444444444445) internal successors, (299), 44 states have internal predecessors, (299), 44 states have call successors, (128), 44 states have call predecessors, (128), 42 states have return successors, (126), 42 states have call predecessors, (126), 43 states have call successors, (126) [2022-04-06 22:24:22,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:24:22,909 INFO L93 Difference]: Finished difference Result 4820 states and 5657 transitions. [2022-04-06 22:24:22,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-04-06 22:24:22,909 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 6.644444444444445) internal successors, (299), 44 states have internal predecessors, (299), 44 states have call successors, (128), 44 states have call predecessors, (128), 42 states have return successors, (126), 42 states have call predecessors, (126), 43 states have call successors, (126) Word has length 802 [2022-04-06 22:24:22,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:24:22,917 INFO L225 Difference]: With dead ends: 4820 [2022-04-06 22:24:22,917 INFO L226 Difference]: Without dead ends: 4811 [2022-04-06 22:24:22,918 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1644 GetRequests, 1517 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=7227, Invalid=9285, Unknown=0, NotChecked=0, Total=16512 [2022-04-06 22:24:22,918 INFO L913 BasicCegarLoop]: 155 mSDtfsCounter, 133 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 704 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 614 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 22:24:22,918 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 614 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 704 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 22:24:22,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4811 states. [2022-04-06 22:24:24,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4811 to 4809. [2022-04-06 22:24:24,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4809 states, 3113 states have (on average 1.0941214262769032) internal successors, (3406), 3229 states have internal predecessors, (3406), 1116 states have call successors, (1116), 580 states have call predecessors, (1116), 579 states have return successors, (1113), 999 states have call predecessors, (1113), 1113 states have call successors, (1113) [2022-04-06 22:24:24,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4809 states to 4809 states and 5635 transitions. [2022-04-06 22:24:24,174 INFO L78 Accepts]: Start accepts. Automaton has 4809 states and 5635 transitions. Word has length 802 [2022-04-06 22:24:24,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:24:24,174 INFO L478 AbstractCegarLoop]: Abstraction has 4809 states and 5635 transitions. [2022-04-06 22:24:24,174 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 6.644444444444445) internal successors, (299), 44 states have internal predecessors, (299), 44 states have call successors, (128), 44 states have call predecessors, (128), 42 states have return successors, (126), 42 states have call predecessors, (126), 43 states have call successors, (126) [2022-04-06 22:24:24,174 INFO L276 IsEmpty]: Start isEmpty. Operand 4809 states and 5635 transitions. [2022-04-06 22:24:24,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 822 [2022-04-06 22:24:24,183 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:24:24,183 INFO L499 BasicCegarLoop]: trace histogram [127, 126, 126, 43, 42, 42, 42, 42, 42, 42, 42, 42, 42, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:24:24,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-04-06 22:24:24,402 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:24:24,402 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:24:24,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:24:24,403 INFO L85 PathProgramCache]: Analyzing trace with hash -530768703, now seen corresponding path program 83 times [2022-04-06 22:24:24,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:24:24,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1556116670] [2022-04-06 22:24:24,403 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:24:24,404 INFO L85 PathProgramCache]: Analyzing trace with hash -530768703, now seen corresponding path program 84 times [2022-04-06 22:24:24,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:24:24,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964366155] [2022-04-06 22:24:24,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:24:24,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:24:24,416 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:24:24,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2110643724] [2022-04-06 22:24:24,416 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 22:24:24,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:24:24,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:24:24,417 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:24:24,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-04-06 22:24:27,983 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 81 check-sat command(s) [2022-04-06 22:24:27,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:24:27,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 1779 conjuncts, 89 conjunts are in the unsatisfiable core [2022-04-06 22:24:28,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:24:29,612 INFO L134 CoverageAnalysis]: Checked inductivity of 37867 backedges. 252 proven. 37107 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2022-04-06 22:24:29,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:24:32,121 INFO L134 CoverageAnalysis]: Checked inductivity of 37867 backedges. 252 proven. 6111 refuted. 0 times theorem prover too weak. 31504 trivial. 0 not checked. [2022-04-06 22:24:32,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:24:32,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964366155] [2022-04-06 22:24:32,122 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:24:32,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110643724] [2022-04-06 22:24:32,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110643724] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:24:32,122 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:24:32,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 90 [2022-04-06 22:24:32,122 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:24:32,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1556116670] [2022-04-06 22:24:32,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1556116670] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:24:32,123 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:24:32,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-04-06 22:24:32,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049381104] [2022-04-06 22:24:32,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:24:32,123 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-04-06 22:24:32,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:24:32,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-04-06 22:24:32,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3833, Invalid=4177, Unknown=0, NotChecked=0, Total=8010 [2022-04-06 22:24:32,125 INFO L87 Difference]: Start difference. First operand 4809 states and 5635 transitions. Second operand has 46 states, 46 states have (on average 6.6521739130434785) internal successors, (306), 45 states have internal predecessors, (306), 45 states have call successors, (131), 45 states have call predecessors, (131), 43 states have return successors, (129), 43 states have call predecessors, (129), 44 states have call successors, (129) [2022-04-06 22:24:34,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:24:34,486 INFO L93 Difference]: Finished difference Result 4938 states and 5796 transitions. [2022-04-06 22:24:34,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-04-06 22:24:34,487 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 6.6521739130434785) internal successors, (306), 45 states have internal predecessors, (306), 45 states have call successors, (131), 45 states have call predecessors, (131), 43 states have return successors, (129), 43 states have call predecessors, (129), 44 states have call successors, (129) Word has length 821 [2022-04-06 22:24:34,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:24:34,495 INFO L225 Difference]: With dead ends: 4938 [2022-04-06 22:24:34,495 INFO L226 Difference]: Without dead ends: 4929 [2022-04-06 22:24:34,496 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1683 GetRequests, 1553 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 988 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=7571, Invalid=9721, Unknown=0, NotChecked=0, Total=17292 [2022-04-06 22:24:34,496 INFO L913 BasicCegarLoop]: 158 mSDtfsCounter, 146 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 670 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 22:24:34,496 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 626 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 670 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 22:24:34,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4929 states. [2022-04-06 22:24:35,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4929 to 4927. [2022-04-06 22:24:35,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4927 states, 3189 states have (on average 1.0940733772342428) internal successors, (3489), 3308 states have internal predecessors, (3489), 1144 states have call successors, (1144), 594 states have call predecessors, (1144), 593 states have return successors, (1141), 1024 states have call predecessors, (1141), 1141 states have call successors, (1141) [2022-04-06 22:24:35,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4927 states to 4927 states and 5774 transitions. [2022-04-06 22:24:35,818 INFO L78 Accepts]: Start accepts. Automaton has 4927 states and 5774 transitions. Word has length 821 [2022-04-06 22:24:35,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:24:35,819 INFO L478 AbstractCegarLoop]: Abstraction has 4927 states and 5774 transitions. [2022-04-06 22:24:35,819 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 6.6521739130434785) internal successors, (306), 45 states have internal predecessors, (306), 45 states have call successors, (131), 45 states have call predecessors, (131), 43 states have return successors, (129), 43 states have call predecessors, (129), 44 states have call successors, (129) [2022-04-06 22:24:35,819 INFO L276 IsEmpty]: Start isEmpty. Operand 4927 states and 5774 transitions. [2022-04-06 22:24:35,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 841 [2022-04-06 22:24:35,828 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:24:35,828 INFO L499 BasicCegarLoop]: trace histogram [130, 129, 129, 44, 43, 43, 43, 43, 43, 43, 43, 43, 43, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:24:35,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-04-06 22:24:36,029 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2022-04-06 22:24:36,029 INFO L403 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:24:36,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:24:36,029 INFO L85 PathProgramCache]: Analyzing trace with hash -336741838, now seen corresponding path program 85 times [2022-04-06 22:24:36,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:24:36,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [726845624] [2022-04-06 22:24:36,034 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:24:36,035 INFO L85 PathProgramCache]: Analyzing trace with hash -336741838, now seen corresponding path program 86 times [2022-04-06 22:24:36,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:24:36,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652275566] [2022-04-06 22:24:36,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:24:36,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:24:36,047 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:24:36,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1248020928] [2022-04-06 22:24:36,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:24:36,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:24:36,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:24:36,048 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:24:36,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-04-06 22:24:36,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:24:36,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:24:36,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 1819 conjuncts, 91 conjunts are in the unsatisfiable core [2022-04-06 22:24:36,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:24:37,901 INFO L134 CoverageAnalysis]: Checked inductivity of 39693 backedges. 258 proven. 38915 refuted. 0 times theorem prover too weak. 520 trivial. 0 not checked. [2022-04-06 22:24:37,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:24:40,503 INFO L134 CoverageAnalysis]: Checked inductivity of 39693 backedges. 258 proven. 6407 refuted. 0 times theorem prover too weak. 33028 trivial. 0 not checked. [2022-04-06 22:24:40,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:24:40,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652275566] [2022-04-06 22:24:40,503 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:24:40,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248020928] [2022-04-06 22:24:40,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248020928] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:24:40,503 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:24:40,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 92 [2022-04-06 22:24:40,504 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:24:40,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [726845624] [2022-04-06 22:24:40,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [726845624] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:24:40,504 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:24:40,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-04-06 22:24:40,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581181055] [2022-04-06 22:24:40,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:24:40,504 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-04-06 22:24:40,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:24:40,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-04-06 22:24:40,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4010, Invalid=4362, Unknown=0, NotChecked=0, Total=8372 [2022-04-06 22:24:40,506 INFO L87 Difference]: Start difference. First operand 4927 states and 5774 transitions. Second operand has 47 states, 47 states have (on average 6.659574468085107) internal successors, (313), 46 states have internal predecessors, (313), 46 states have call successors, (134), 46 states have call predecessors, (134), 44 states have return successors, (132), 44 states have call predecessors, (132), 45 states have call successors, (132) [2022-04-06 22:24:43,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:24:43,066 INFO L93 Difference]: Finished difference Result 5056 states and 5935 transitions. [2022-04-06 22:24:43,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-04-06 22:24:43,067 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 6.659574468085107) internal successors, (313), 46 states have internal predecessors, (313), 46 states have call successors, (134), 46 states have call predecessors, (134), 44 states have return successors, (132), 44 states have call predecessors, (132), 45 states have call successors, (132) Word has length 840 [2022-04-06 22:24:43,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:24:43,075 INFO L225 Difference]: With dead ends: 5056 [2022-04-06 22:24:43,075 INFO L226 Difference]: Without dead ends: 5047 [2022-04-06 22:24:43,076 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1722 GetRequests, 1589 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1033 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=7923, Invalid=10167, Unknown=0, NotChecked=0, Total=18090 [2022-04-06 22:24:43,076 INFO L913 BasicCegarLoop]: 161 mSDtfsCounter, 193 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 598 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 22:24:43,077 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 598 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 654 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 22:24:43,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5047 states. [2022-04-06 22:24:44,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5047 to 5045. [2022-04-06 22:24:44,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5045 states, 3265 states have (on average 1.0940275650842266) internal successors, (3572), 3387 states have internal predecessors, (3572), 1172 states have call successors, (1172), 608 states have call predecessors, (1172), 607 states have return successors, (1169), 1049 states have call predecessors, (1169), 1169 states have call successors, (1169) [2022-04-06 22:24:44,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5045 states to 5045 states and 5913 transitions. [2022-04-06 22:24:44,388 INFO L78 Accepts]: Start accepts. Automaton has 5045 states and 5913 transitions. Word has length 840 [2022-04-06 22:24:44,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:24:44,408 INFO L478 AbstractCegarLoop]: Abstraction has 5045 states and 5913 transitions. [2022-04-06 22:24:44,408 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 6.659574468085107) internal successors, (313), 46 states have internal predecessors, (313), 46 states have call successors, (134), 46 states have call predecessors, (134), 44 states have return successors, (132), 44 states have call predecessors, (132), 45 states have call successors, (132) [2022-04-06 22:24:44,408 INFO L276 IsEmpty]: Start isEmpty. Operand 5045 states and 5913 transitions. [2022-04-06 22:24:44,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 860 [2022-04-06 22:24:44,418 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:24:44,418 INFO L499 BasicCegarLoop]: trace histogram [133, 132, 132, 45, 44, 44, 44, 44, 44, 44, 44, 44, 44, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:24:44,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-04-06 22:24:44,618 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:24:44,618 INFO L403 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:24:44,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:24:44,619 INFO L85 PathProgramCache]: Analyzing trace with hash 356883745, now seen corresponding path program 87 times [2022-04-06 22:24:44,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:24:44,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [434753430] [2022-04-06 22:24:44,619 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:24:44,619 INFO L85 PathProgramCache]: Analyzing trace with hash 356883745, now seen corresponding path program 88 times [2022-04-06 22:24:44,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:24:44,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509665113] [2022-04-06 22:24:44,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:24:44,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:24:44,632 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:24:44,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [915674499] [2022-04-06 22:24:44,632 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 22:24:44,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:24:44,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:24:44,633 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:24:44,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-04-06 22:24:44,876 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 22:24:44,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:24:44,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 1859 conjuncts, 93 conjunts are in the unsatisfiable core [2022-04-06 22:24:44,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:24:46,555 INFO L134 CoverageAnalysis]: Checked inductivity of 41562 backedges. 264 proven. 40766 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2022-04-06 22:24:46,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:24:49,260 INFO L134 CoverageAnalysis]: Checked inductivity of 41562 backedges. 264 proven. 6710 refuted. 0 times theorem prover too weak. 34588 trivial. 0 not checked. [2022-04-06 22:24:49,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:24:49,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509665113] [2022-04-06 22:24:49,261 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:24:49,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915674499] [2022-04-06 22:24:49,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915674499] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:24:49,261 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:24:49,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 94 [2022-04-06 22:24:49,261 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:24:49,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [434753430] [2022-04-06 22:24:49,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [434753430] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:24:49,261 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:24:49,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-04-06 22:24:49,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784535133] [2022-04-06 22:24:49,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:24:49,262 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-04-06 22:24:49,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:24:49,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-04-06 22:24:49,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4191, Invalid=4551, Unknown=0, NotChecked=0, Total=8742 [2022-04-06 22:24:49,264 INFO L87 Difference]: Start difference. First operand 5045 states and 5913 transitions. Second operand has 48 states, 48 states have (on average 6.666666666666667) internal successors, (320), 47 states have internal predecessors, (320), 47 states have call successors, (137), 47 states have call predecessors, (137), 45 states have return successors, (135), 45 states have call predecessors, (135), 46 states have call successors, (135) [2022-04-06 22:24:51,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:24:51,934 INFO L93 Difference]: Finished difference Result 5174 states and 6074 transitions. [2022-04-06 22:24:51,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-04-06 22:24:51,935 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 6.666666666666667) internal successors, (320), 47 states have internal predecessors, (320), 47 states have call successors, (137), 47 states have call predecessors, (137), 45 states have return successors, (135), 45 states have call predecessors, (135), 46 states have call successors, (135) Word has length 859 [2022-04-06 22:24:51,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:24:51,943 INFO L225 Difference]: With dead ends: 5174 [2022-04-06 22:24:51,943 INFO L226 Difference]: Without dead ends: 5165 [2022-04-06 22:24:51,945 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1761 GetRequests, 1625 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=8283, Invalid=10623, Unknown=0, NotChecked=0, Total=18906 [2022-04-06 22:24:51,945 INFO L913 BasicCegarLoop]: 164 mSDtfsCounter, 157 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 824 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 22:24:51,945 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 650 Invalid, 845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 824 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 22:24:51,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5165 states. [2022-04-06 22:24:53,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5165 to 5163. [2022-04-06 22:24:53,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5163 states, 3341 states have (on average 1.0939838371744988) internal successors, (3655), 3466 states have internal predecessors, (3655), 1200 states have call successors, (1200), 622 states have call predecessors, (1200), 621 states have return successors, (1197), 1074 states have call predecessors, (1197), 1197 states have call successors, (1197) [2022-04-06 22:24:53,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5163 states to 5163 states and 6052 transitions. [2022-04-06 22:24:53,319 INFO L78 Accepts]: Start accepts. Automaton has 5163 states and 6052 transitions. Word has length 859 [2022-04-06 22:24:53,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:24:53,319 INFO L478 AbstractCegarLoop]: Abstraction has 5163 states and 6052 transitions. [2022-04-06 22:24:53,320 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 6.666666666666667) internal successors, (320), 47 states have internal predecessors, (320), 47 states have call successors, (137), 47 states have call predecessors, (137), 45 states have return successors, (135), 45 states have call predecessors, (135), 46 states have call successors, (135) [2022-04-06 22:24:53,320 INFO L276 IsEmpty]: Start isEmpty. Operand 5163 states and 6052 transitions. [2022-04-06 22:24:53,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 879 [2022-04-06 22:24:53,329 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:24:53,329 INFO L499 BasicCegarLoop]: trace histogram [136, 135, 135, 46, 45, 45, 45, 45, 45, 45, 45, 45, 45, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:24:53,349 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-04-06 22:24:53,530 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:24:53,530 INFO L403 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:24:53,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:24:53,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1172676050, now seen corresponding path program 89 times [2022-04-06 22:24:53,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:24:53,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [431337268] [2022-04-06 22:24:53,531 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:24:53,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1172676050, now seen corresponding path program 90 times [2022-04-06 22:24:53,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:24:53,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022071937] [2022-04-06 22:24:53,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:24:53,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:24:53,543 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:24:53,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1822358675] [2022-04-06 22:24:53,544 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 22:24:53,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:24:53,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:24:53,545 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:24:53,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-04-06 22:25:22,205 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 86 check-sat command(s) [2022-04-06 22:25:22,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:25:22,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 1890 conjuncts, 95 conjunts are in the unsatisfiable core [2022-04-06 22:25:22,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:25:24,024 INFO L134 CoverageAnalysis]: Checked inductivity of 43474 backedges. 270 proven. 42660 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-04-06 22:25:24,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:25:26,861 INFO L134 CoverageAnalysis]: Checked inductivity of 43474 backedges. 270 proven. 7020 refuted. 0 times theorem prover too weak. 36184 trivial. 0 not checked. [2022-04-06 22:25:26,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:25:26,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022071937] [2022-04-06 22:25:26,861 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:25:26,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822358675] [2022-04-06 22:25:26,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822358675] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:25:26,861 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:25:26,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 96 [2022-04-06 22:25:26,862 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:25:26,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [431337268] [2022-04-06 22:25:26,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [431337268] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:25:26,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:25:26,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-04-06 22:25:26,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251778954] [2022-04-06 22:25:26,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:25:26,862 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-04-06 22:25:26,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:25:26,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-04-06 22:25:26,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4376, Invalid=4744, Unknown=0, NotChecked=0, Total=9120 [2022-04-06 22:25:26,864 INFO L87 Difference]: Start difference. First operand 5163 states and 6052 transitions. Second operand has 49 states, 49 states have (on average 6.673469387755102) internal successors, (327), 48 states have internal predecessors, (327), 48 states have call successors, (140), 48 states have call predecessors, (140), 46 states have return successors, (138), 46 states have call predecessors, (138), 47 states have call successors, (138) [2022-04-06 22:25:29,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:25:29,676 INFO L93 Difference]: Finished difference Result 5292 states and 6213 transitions. [2022-04-06 22:25:29,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-04-06 22:25:29,676 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 6.673469387755102) internal successors, (327), 48 states have internal predecessors, (327), 48 states have call successors, (140), 48 states have call predecessors, (140), 46 states have return successors, (138), 46 states have call predecessors, (138), 47 states have call successors, (138) Word has length 878 [2022-04-06 22:25:29,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:25:29,686 INFO L225 Difference]: With dead ends: 5292 [2022-04-06 22:25:29,686 INFO L226 Difference]: Without dead ends: 5283 [2022-04-06 22:25:29,687 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1800 GetRequests, 1661 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1126 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=8651, Invalid=11089, Unknown=0, NotChecked=0, Total=19740 [2022-04-06 22:25:29,687 INFO L913 BasicCegarLoop]: 167 mSDtfsCounter, 201 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 632 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 22:25:29,688 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 632 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 22:25:29,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5283 states. [2022-04-06 22:25:31,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5283 to 5281. [2022-04-06 22:25:31,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5281 states, 3417 states have (on average 1.0939420544337137) internal successors, (3738), 3545 states have internal predecessors, (3738), 1228 states have call successors, (1228), 636 states have call predecessors, (1228), 635 states have return successors, (1225), 1099 states have call predecessors, (1225), 1225 states have call successors, (1225) [2022-04-06 22:25:31,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5281 states to 5281 states and 6191 transitions. [2022-04-06 22:25:31,154 INFO L78 Accepts]: Start accepts. Automaton has 5281 states and 6191 transitions. Word has length 878 [2022-04-06 22:25:31,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:25:31,155 INFO L478 AbstractCegarLoop]: Abstraction has 5281 states and 6191 transitions. [2022-04-06 22:25:31,155 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 6.673469387755102) internal successors, (327), 48 states have internal predecessors, (327), 48 states have call successors, (140), 48 states have call predecessors, (140), 46 states have return successors, (138), 46 states have call predecessors, (138), 47 states have call successors, (138) [2022-04-06 22:25:31,155 INFO L276 IsEmpty]: Start isEmpty. Operand 5281 states and 6191 transitions. [2022-04-06 22:25:31,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 898 [2022-04-06 22:25:31,165 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:25:31,165 INFO L499 BasicCegarLoop]: trace histogram [139, 138, 138, 47, 46, 46, 46, 46, 46, 46, 46, 46, 46, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:25:31,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-04-06 22:25:31,365 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2022-04-06 22:25:31,365 INFO L403 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:25:31,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:25:31,366 INFO L85 PathProgramCache]: Analyzing trace with hash 942331265, now seen corresponding path program 91 times [2022-04-06 22:25:31,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:25:31,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1421960017] [2022-04-06 22:25:31,366 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:25:31,367 INFO L85 PathProgramCache]: Analyzing trace with hash 942331265, now seen corresponding path program 92 times [2022-04-06 22:25:31,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:25:31,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495960144] [2022-04-06 22:25:31,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:25:31,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:25:31,379 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:25:31,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [757341977] [2022-04-06 22:25:31,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:25:31,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:25:31,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:25:31,381 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:25:31,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-04-06 22:25:31,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:25:31,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:25:31,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 1939 conjuncts, 97 conjunts are in the unsatisfiable core [2022-04-06 22:25:31,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:25:33,422 INFO L134 CoverageAnalysis]: Checked inductivity of 45429 backedges. 276 proven. 44597 refuted. 0 times theorem prover too weak. 556 trivial. 0 not checked. [2022-04-06 22:25:33,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:25:36,393 INFO L134 CoverageAnalysis]: Checked inductivity of 45429 backedges. 276 proven. 7337 refuted. 0 times theorem prover too weak. 37816 trivial. 0 not checked. [2022-04-06 22:25:36,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:25:36,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495960144] [2022-04-06 22:25:36,393 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:25:36,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757341977] [2022-04-06 22:25:36,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757341977] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:25:36,393 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:25:36,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 98 [2022-04-06 22:25:36,394 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:25:36,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1421960017] [2022-04-06 22:25:36,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1421960017] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:25:36,394 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:25:36,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-04-06 22:25:36,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019452994] [2022-04-06 22:25:36,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:25:36,394 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-04-06 22:25:36,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:25:36,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-04-06 22:25:36,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4565, Invalid=4941, Unknown=0, NotChecked=0, Total=9506 [2022-04-06 22:25:36,396 INFO L87 Difference]: Start difference. First operand 5281 states and 6191 transitions. Second operand has 50 states, 50 states have (on average 6.68) internal successors, (334), 49 states have internal predecessors, (334), 49 states have call successors, (143), 49 states have call predecessors, (143), 47 states have return successors, (141), 47 states have call predecessors, (141), 48 states have call successors, (141) [2022-04-06 22:25:39,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:25:39,179 INFO L93 Difference]: Finished difference Result 5410 states and 6352 transitions. [2022-04-06 22:25:39,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-04-06 22:25:39,180 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 6.68) internal successors, (334), 49 states have internal predecessors, (334), 49 states have call successors, (143), 49 states have call predecessors, (143), 47 states have return successors, (141), 47 states have call predecessors, (141), 48 states have call successors, (141) Word has length 897 [2022-04-06 22:25:39,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:25:39,188 INFO L225 Difference]: With dead ends: 5410 [2022-04-06 22:25:39,188 INFO L226 Difference]: Without dead ends: 5401 [2022-04-06 22:25:39,190 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1839 GetRequests, 1697 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1174 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=9027, Invalid=11565, Unknown=0, NotChecked=0, Total=20592 [2022-04-06 22:25:39,190 INFO L913 BasicCegarLoop]: 170 mSDtfsCounter, 170 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 684 SdHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 22:25:39,190 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 684 Invalid, 742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 714 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 22:25:39,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5401 states. [2022-04-06 22:25:40,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5401 to 5399. [2022-04-06 22:25:40,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5399 states, 3493 states have (on average 1.093902089894074) internal successors, (3821), 3624 states have internal predecessors, (3821), 1256 states have call successors, (1256), 650 states have call predecessors, (1256), 649 states have return successors, (1253), 1124 states have call predecessors, (1253), 1253 states have call successors, (1253) [2022-04-06 22:25:40,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5399 states to 5399 states and 6330 transitions. [2022-04-06 22:25:40,621 INFO L78 Accepts]: Start accepts. Automaton has 5399 states and 6330 transitions. Word has length 897 [2022-04-06 22:25:40,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:25:40,622 INFO L478 AbstractCegarLoop]: Abstraction has 5399 states and 6330 transitions. [2022-04-06 22:25:40,622 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 6.68) internal successors, (334), 49 states have internal predecessors, (334), 49 states have call successors, (143), 49 states have call predecessors, (143), 47 states have return successors, (141), 47 states have call predecessors, (141), 48 states have call successors, (141) [2022-04-06 22:25:40,622 INFO L276 IsEmpty]: Start isEmpty. Operand 5399 states and 6330 transitions. [2022-04-06 22:25:40,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 917 [2022-04-06 22:25:40,632 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:25:40,632 INFO L499 BasicCegarLoop]: trace histogram [142, 141, 141, 48, 47, 47, 47, 47, 47, 47, 47, 47, 47, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:25:40,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-04-06 22:25:40,832 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-04-06 22:25:40,833 INFO L403 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:25:40,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:25:40,833 INFO L85 PathProgramCache]: Analyzing trace with hash -361379470, now seen corresponding path program 93 times [2022-04-06 22:25:40,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:25:40,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [562414615] [2022-04-06 22:25:40,834 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:25:40,834 INFO L85 PathProgramCache]: Analyzing trace with hash -361379470, now seen corresponding path program 94 times [2022-04-06 22:25:40,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:25:40,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226979177] [2022-04-06 22:25:40,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:25:40,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:25:40,861 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:25:40,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [112199797] [2022-04-06 22:25:40,861 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 22:25:40,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:25:40,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:25:40,862 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:25:40,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-04-06 22:25:41,147 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 22:25:41,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:25:41,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 1979 conjuncts, 99 conjunts are in the unsatisfiable core [2022-04-06 22:25:41,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:25:42,984 INFO L134 CoverageAnalysis]: Checked inductivity of 47427 backedges. 282 proven. 46577 refuted. 0 times theorem prover too weak. 568 trivial. 0 not checked. [2022-04-06 22:25:42,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:25:46,037 INFO L134 CoverageAnalysis]: Checked inductivity of 47427 backedges. 282 proven. 7661 refuted. 0 times theorem prover too weak. 39484 trivial. 0 not checked. [2022-04-06 22:25:46,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:25:46,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226979177] [2022-04-06 22:25:46,037 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:25:46,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112199797] [2022-04-06 22:25:46,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112199797] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:25:46,037 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:25:46,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 100 [2022-04-06 22:25:46,038 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:25:46,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [562414615] [2022-04-06 22:25:46,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [562414615] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:25:46,038 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:25:46,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-04-06 22:25:46,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907447526] [2022-04-06 22:25:46,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:25:46,039 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-04-06 22:25:46,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:25:46,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-04-06 22:25:46,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4758, Invalid=5142, Unknown=0, NotChecked=0, Total=9900 [2022-04-06 22:25:46,041 INFO L87 Difference]: Start difference. First operand 5399 states and 6330 transitions. Second operand has 51 states, 51 states have (on average 6.686274509803922) internal successors, (341), 50 states have internal predecessors, (341), 50 states have call successors, (146), 50 states have call predecessors, (146), 48 states have return successors, (144), 48 states have call predecessors, (144), 49 states have call successors, (144) [2022-04-06 22:25:48,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:25:48,929 INFO L93 Difference]: Finished difference Result 5528 states and 6491 transitions. [2022-04-06 22:25:48,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-04-06 22:25:48,929 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 6.686274509803922) internal successors, (341), 50 states have internal predecessors, (341), 50 states have call successors, (146), 50 states have call predecessors, (146), 48 states have return successors, (144), 48 states have call predecessors, (144), 49 states have call successors, (144) Word has length 916 [2022-04-06 22:25:48,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:25:48,938 INFO L225 Difference]: With dead ends: 5528 [2022-04-06 22:25:48,938 INFO L226 Difference]: Without dead ends: 5519 [2022-04-06 22:25:48,940 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1878 GetRequests, 1733 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1223 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=9411, Invalid=12051, Unknown=0, NotChecked=0, Total=21462 [2022-04-06 22:25:48,940 INFO L913 BasicCegarLoop]: 173 mSDtfsCounter, 135 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 944 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 716 SdHoareTripleChecker+Invalid, 965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 22:25:48,940 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 716 Invalid, 965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 944 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 22:25:48,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5519 states. [2022-04-06 22:25:50,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5519 to 5517. [2022-04-06 22:25:50,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5517 states, 3569 states have (on average 1.0938638274026338) internal successors, (3904), 3703 states have internal predecessors, (3904), 1284 states have call successors, (1284), 664 states have call predecessors, (1284), 663 states have return successors, (1281), 1149 states have call predecessors, (1281), 1281 states have call successors, (1281) [2022-04-06 22:25:50,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5517 states to 5517 states and 6469 transitions. [2022-04-06 22:25:50,459 INFO L78 Accepts]: Start accepts. Automaton has 5517 states and 6469 transitions. Word has length 916 [2022-04-06 22:25:50,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:25:50,460 INFO L478 AbstractCegarLoop]: Abstraction has 5517 states and 6469 transitions. [2022-04-06 22:25:50,460 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 6.686274509803922) internal successors, (341), 50 states have internal predecessors, (341), 50 states have call successors, (146), 50 states have call predecessors, (146), 48 states have return successors, (144), 48 states have call predecessors, (144), 49 states have call successors, (144) [2022-04-06 22:25:50,460 INFO L276 IsEmpty]: Start isEmpty. Operand 5517 states and 6469 transitions. [2022-04-06 22:25:50,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 936 [2022-04-06 22:25:50,470 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:25:50,470 INFO L499 BasicCegarLoop]: trace histogram [145, 144, 144, 49, 48, 48, 48, 48, 48, 48, 48, 48, 48, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:25:50,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-04-06 22:25:50,672 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:25:50,672 INFO L403 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:25:50,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:25:50,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1648179743, now seen corresponding path program 95 times [2022-04-06 22:25:50,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:25:50,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1002486837] [2022-04-06 22:25:50,675 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:25:50,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1648179743, now seen corresponding path program 96 times [2022-04-06 22:25:50,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:25:50,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539394349] [2022-04-06 22:25:50,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:25:50,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:25:50,690 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:25:50,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1731114013] [2022-04-06 22:25:50,690 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 22:25:50,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:25:50,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:25:50,691 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:25:50,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-04-06 22:25:52,230 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 95 check-sat command(s) [2022-04-06 22:25:52,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:25:52,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 2019 conjuncts, 101 conjunts are in the unsatisfiable core [2022-04-06 22:25:52,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:25:54,098 INFO L134 CoverageAnalysis]: Checked inductivity of 49468 backedges. 288 proven. 48600 refuted. 0 times theorem prover too weak. 580 trivial. 0 not checked. [2022-04-06 22:25:54,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:25:57,200 INFO L134 CoverageAnalysis]: Checked inductivity of 49468 backedges. 288 proven. 7992 refuted. 0 times theorem prover too weak. 41188 trivial. 0 not checked. [2022-04-06 22:25:57,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:25:57,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539394349] [2022-04-06 22:25:57,200 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:25:57,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731114013] [2022-04-06 22:25:57,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731114013] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:25:57,201 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:25:57,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 102 [2022-04-06 22:25:57,201 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:25:57,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1002486837] [2022-04-06 22:25:57,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1002486837] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:25:57,201 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:25:57,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-04-06 22:25:57,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126755063] [2022-04-06 22:25:57,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:25:57,202 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-04-06 22:25:57,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:25:57,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-04-06 22:25:57,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4955, Invalid=5347, Unknown=0, NotChecked=0, Total=10302 [2022-04-06 22:25:57,204 INFO L87 Difference]: Start difference. First operand 5517 states and 6469 transitions. Second operand has 52 states, 52 states have (on average 6.6923076923076925) internal successors, (348), 51 states have internal predecessors, (348), 51 states have call successors, (149), 51 states have call predecessors, (149), 49 states have return successors, (147), 49 states have call predecessors, (147), 50 states have call successors, (147) [2022-04-06 22:26:00,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:26:00,308 INFO L93 Difference]: Finished difference Result 5646 states and 6630 transitions. [2022-04-06 22:26:00,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-04-06 22:26:00,308 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 6.6923076923076925) internal successors, (348), 51 states have internal predecessors, (348), 51 states have call successors, (149), 51 states have call predecessors, (149), 49 states have return successors, (147), 49 states have call predecessors, (147), 50 states have call successors, (147) Word has length 935 [2022-04-06 22:26:00,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:26:00,318 INFO L225 Difference]: With dead ends: 5646 [2022-04-06 22:26:00,318 INFO L226 Difference]: Without dead ends: 5637 [2022-04-06 22:26:00,320 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1917 GetRequests, 1769 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1273 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=9803, Invalid=12547, Unknown=0, NotChecked=0, Total=22350 [2022-04-06 22:26:00,320 INFO L913 BasicCegarLoop]: 176 mSDtfsCounter, 179 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 751 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 718 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 22:26:00,320 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 718 Invalid, 793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 751 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 22:26:00,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5637 states. [2022-04-06 22:26:01,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5637 to 5635. [2022-04-06 22:26:01,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5635 states, 3645 states have (on average 1.0938271604938272) internal successors, (3987), 3782 states have internal predecessors, (3987), 1312 states have call successors, (1312), 678 states have call predecessors, (1312), 677 states have return successors, (1309), 1174 states have call predecessors, (1309), 1309 states have call successors, (1309) [2022-04-06 22:26:01,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5635 states to 5635 states and 6608 transitions. [2022-04-06 22:26:01,845 INFO L78 Accepts]: Start accepts. Automaton has 5635 states and 6608 transitions. Word has length 935 [2022-04-06 22:26:01,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:26:01,846 INFO L478 AbstractCegarLoop]: Abstraction has 5635 states and 6608 transitions. [2022-04-06 22:26:01,846 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 6.6923076923076925) internal successors, (348), 51 states have internal predecessors, (348), 51 states have call successors, (149), 51 states have call predecessors, (149), 49 states have return successors, (147), 49 states have call predecessors, (147), 50 states have call successors, (147) [2022-04-06 22:26:01,846 INFO L276 IsEmpty]: Start isEmpty. Operand 5635 states and 6608 transitions. [2022-04-06 22:26:01,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 955 [2022-04-06 22:26:01,857 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:26:01,857 INFO L499 BasicCegarLoop]: trace histogram [148, 147, 147, 50, 49, 49, 49, 49, 49, 49, 49, 49, 49, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:26:01,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-04-06 22:26:02,057 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:26:02,058 INFO L403 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:26:02,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:26:02,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1831353618, now seen corresponding path program 97 times [2022-04-06 22:26:02,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:26:02,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [25470900] [2022-04-06 22:26:02,059 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:26:02,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1831353618, now seen corresponding path program 98 times [2022-04-06 22:26:02,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:26:02,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512378484] [2022-04-06 22:26:02,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:26:02,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:26:02,072 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:26:02,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [468832246] [2022-04-06 22:26:02,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:26:02,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:26:02,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:26:02,073 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:26:02,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-04-06 22:26:02,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:26:02,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:26:02,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 2059 conjuncts, 103 conjunts are in the unsatisfiable core [2022-04-06 22:26:02,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:26:04,284 INFO L134 CoverageAnalysis]: Checked inductivity of 51552 backedges. 294 proven. 50666 refuted. 0 times theorem prover too weak. 592 trivial. 0 not checked. [2022-04-06 22:26:04,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:26:07,472 INFO L134 CoverageAnalysis]: Checked inductivity of 51552 backedges. 294 proven. 8330 refuted. 0 times theorem prover too weak. 42928 trivial. 0 not checked. [2022-04-06 22:26:07,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:26:07,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512378484] [2022-04-06 22:26:07,472 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:26:07,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468832246] [2022-04-06 22:26:07,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468832246] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:26:07,472 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:26:07,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 104 [2022-04-06 22:26:07,473 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:26:07,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [25470900] [2022-04-06 22:26:07,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [25470900] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:26:07,473 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:26:07,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-04-06 22:26:07,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772388707] [2022-04-06 22:26:07,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:26:07,474 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-04-06 22:26:07,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:26:07,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-04-06 22:26:07,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-04-06 22:26:07,476 INFO L87 Difference]: Start difference. First operand 5635 states and 6608 transitions. Second operand has 53 states, 53 states have (on average 6.69811320754717) internal successors, (355), 52 states have internal predecessors, (355), 52 states have call successors, (152), 52 states have call predecessors, (152), 50 states have return successors, (150), 50 states have call predecessors, (150), 51 states have call successors, (150) [2022-04-06 22:26:10,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:26:10,520 INFO L93 Difference]: Finished difference Result 5764 states and 6769 transitions. [2022-04-06 22:26:10,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-04-06 22:26:10,521 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 6.69811320754717) internal successors, (355), 52 states have internal predecessors, (355), 52 states have call successors, (152), 52 states have call predecessors, (152), 50 states have return successors, (150), 50 states have call predecessors, (150), 51 states have call successors, (150) Word has length 954 [2022-04-06 22:26:10,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:26:10,530 INFO L225 Difference]: With dead ends: 5764 [2022-04-06 22:26:10,530 INFO L226 Difference]: Without dead ends: 5755 [2022-04-06 22:26:10,532 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1956 GetRequests, 1805 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1324 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=10203, Invalid=13053, Unknown=0, NotChecked=0, Total=23256 [2022-04-06 22:26:10,532 INFO L913 BasicCegarLoop]: 179 mSDtfsCounter, 168 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 891 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 710 SdHoareTripleChecker+Invalid, 919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 22:26:10,533 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 710 Invalid, 919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 891 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 22:26:10,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5755 states. [2022-04-06 22:26:12,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5755 to 5753. [2022-04-06 22:26:12,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 3721 states have (on average 1.0937919914001613) internal successors, (4070), 3861 states have internal predecessors, (4070), 1340 states have call successors, (1340), 692 states have call predecessors, (1340), 691 states have return successors, (1337), 1199 states have call predecessors, (1337), 1337 states have call successors, (1337) [2022-04-06 22:26:12,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 6747 transitions. [2022-04-06 22:26:12,188 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 6747 transitions. Word has length 954 [2022-04-06 22:26:12,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:26:12,189 INFO L478 AbstractCegarLoop]: Abstraction has 5753 states and 6747 transitions. [2022-04-06 22:26:12,189 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 6.69811320754717) internal successors, (355), 52 states have internal predecessors, (355), 52 states have call successors, (152), 52 states have call predecessors, (152), 50 states have return successors, (150), 50 states have call predecessors, (150), 51 states have call successors, (150) [2022-04-06 22:26:12,189 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 6747 transitions. [2022-04-06 22:26:12,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 974 [2022-04-06 22:26:12,200 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:26:12,200 INFO L499 BasicCegarLoop]: trace histogram [151, 150, 150, 51, 50, 50, 50, 50, 50, 50, 50, 50, 50, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:26:12,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-04-06 22:26:12,401 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:26:12,401 INFO L403 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:26:12,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:26:12,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1648586305, now seen corresponding path program 99 times [2022-04-06 22:26:12,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:26:12,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [634334274] [2022-04-06 22:26:12,402 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:26:12,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1648586305, now seen corresponding path program 100 times [2022-04-06 22:26:12,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:26:12,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79485410] [2022-04-06 22:26:12,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:26:12,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:26:12,416 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:26:12,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [461019385] [2022-04-06 22:26:12,416 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 22:26:12,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:26:12,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:26:12,417 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:26:12,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-04-06 22:26:12,700 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 22:26:12,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:26:12,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 2099 conjuncts, 105 conjunts are in the unsatisfiable core [2022-04-06 22:26:12,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:26:14,714 INFO L134 CoverageAnalysis]: Checked inductivity of 53679 backedges. 300 proven. 52775 refuted. 0 times theorem prover too weak. 604 trivial. 0 not checked. [2022-04-06 22:26:14,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:26:17,905 INFO L134 CoverageAnalysis]: Checked inductivity of 53679 backedges. 300 proven. 8675 refuted. 0 times theorem prover too weak. 44704 trivial. 0 not checked. [2022-04-06 22:26:17,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:26:17,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79485410] [2022-04-06 22:26:17,905 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:26:17,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461019385] [2022-04-06 22:26:17,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461019385] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:26:17,905 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:26:17,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 104 [2022-04-06 22:26:17,906 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:26:17,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [634334274] [2022-04-06 22:26:17,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [634334274] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:26:17,906 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:26:17,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-04-06 22:26:17,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188152444] [2022-04-06 22:26:17,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:26:17,907 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-04-06 22:26:17,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:26:17,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-04-06 22:26:17,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-04-06 22:26:17,909 INFO L87 Difference]: Start difference. First operand 5753 states and 6747 transitions. Second operand has 54 states, 54 states have (on average 6.703703703703703) internal successors, (362), 53 states have internal predecessors, (362), 53 states have call successors, (155), 53 states have call predecessors, (155), 51 states have return successors, (153), 51 states have call predecessors, (153), 52 states have call successors, (153) [2022-04-06 22:26:21,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:26:21,047 INFO L93 Difference]: Finished difference Result 5882 states and 6908 transitions. [2022-04-06 22:26:21,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-04-06 22:26:21,047 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 6.703703703703703) internal successors, (362), 53 states have internal predecessors, (362), 53 states have call successors, (155), 53 states have call predecessors, (155), 51 states have return successors, (153), 51 states have call predecessors, (153), 52 states have call successors, (153) Word has length 973 [2022-04-06 22:26:21,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:26:21,056 INFO L225 Difference]: With dead ends: 5882 [2022-04-06 22:26:21,056 INFO L226 Difference]: Without dead ends: 5873 [2022-04-06 22:26:21,058 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1995 GetRequests, 1842 SyntacticMatches, 1 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1423 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=10306, Invalid=13256, Unknown=0, NotChecked=0, Total=23562 [2022-04-06 22:26:21,058 INFO L913 BasicCegarLoop]: 182 mSDtfsCounter, 198 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 809 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 22:26:21,058 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 712 Invalid, 851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 809 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 22:26:21,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5873 states. [2022-04-06 22:26:22,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5873 to 5871. [2022-04-06 22:26:22,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5871 states, 3797 states have (on average 1.0937582301817224) internal successors, (4153), 3940 states have internal predecessors, (4153), 1368 states have call successors, (1368), 706 states have call predecessors, (1368), 705 states have return successors, (1365), 1224 states have call predecessors, (1365), 1365 states have call successors, (1365) [2022-04-06 22:26:22,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5871 states to 5871 states and 6886 transitions. [2022-04-06 22:26:22,635 INFO L78 Accepts]: Start accepts. Automaton has 5871 states and 6886 transitions. Word has length 973 [2022-04-06 22:26:22,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:26:22,635 INFO L478 AbstractCegarLoop]: Abstraction has 5871 states and 6886 transitions. [2022-04-06 22:26:22,635 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 6.703703703703703) internal successors, (362), 53 states have internal predecessors, (362), 53 states have call successors, (155), 53 states have call predecessors, (155), 51 states have return successors, (153), 51 states have call predecessors, (153), 52 states have call successors, (153) [2022-04-06 22:26:22,635 INFO L276 IsEmpty]: Start isEmpty. Operand 5871 states and 6886 transitions. [2022-04-06 22:26:22,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 993 [2022-04-06 22:26:22,646 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:26:22,647 INFO L499 BasicCegarLoop]: trace histogram [154, 153, 153, 52, 51, 51, 51, 51, 51, 51, 51, 51, 51, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:26:22,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-04-06 22:26:22,847 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:26:22,847 INFO L403 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:26:22,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:26:22,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1778841778, now seen corresponding path program 101 times [2022-04-06 22:26:22,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:26:22,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [857617100] [2022-04-06 22:26:22,848 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:26:22,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1778841778, now seen corresponding path program 102 times [2022-04-06 22:26:22,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:26:22,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143332311] [2022-04-06 22:26:22,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:26:22,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:26:22,862 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:26:22,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [713074758] [2022-04-06 22:26:22,862 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 22:26:22,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:26:22,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:26:22,863 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:26:22,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-04-06 22:26:24,040 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 96 check-sat command(s) [2022-04-06 22:26:24,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:26:24,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 2112 conjuncts, 107 conjunts are in the unsatisfiable core [2022-04-06 22:26:24,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:26:26,112 INFO L134 CoverageAnalysis]: Checked inductivity of 55849 backedges. 306 proven. 54927 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-04-06 22:26:26,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:26:29,337 INFO L134 CoverageAnalysis]: Checked inductivity of 55849 backedges. 306 proven. 9027 refuted. 0 times theorem prover too weak. 46516 trivial. 0 not checked. [2022-04-06 22:26:29,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:26:29,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143332311] [2022-04-06 22:26:29,338 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:26:29,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713074758] [2022-04-06 22:26:29,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713074758] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:26:29,338 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:26:29,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 104 [2022-04-06 22:26:29,338 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:26:29,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [857617100] [2022-04-06 22:26:29,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [857617100] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:26:29,338 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:26:29,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-04-06 22:26:29,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781231789] [2022-04-06 22:26:29,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:26:29,339 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-04-06 22:26:29,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:26:29,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-04-06 22:26:29,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-04-06 22:26:29,341 INFO L87 Difference]: Start difference. First operand 5871 states and 6886 transitions. Second operand has 55 states, 55 states have (on average 6.709090909090909) internal successors, (369), 54 states have internal predecessors, (369), 54 states have call successors, (158), 54 states have call predecessors, (158), 52 states have return successors, (156), 52 states have call predecessors, (156), 53 states have call successors, (156) [2022-04-06 22:26:32,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:26:32,564 INFO L93 Difference]: Finished difference Result 6000 states and 7047 transitions. [2022-04-06 22:26:32,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-04-06 22:26:32,564 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 6.709090909090909) internal successors, (369), 54 states have internal predecessors, (369), 54 states have call successors, (158), 54 states have call predecessors, (158), 52 states have return successors, (156), 52 states have call predecessors, (156), 53 states have call successors, (156) Word has length 992 [2022-04-06 22:26:32,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:26:32,574 INFO L225 Difference]: With dead ends: 6000 [2022-04-06 22:26:32,574 INFO L226 Difference]: Without dead ends: 5991 [2022-04-06 22:26:32,575 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 2034 GetRequests, 1880 SyntacticMatches, 1 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1473 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=10409, Invalid=13461, Unknown=0, NotChecked=0, Total=23870 [2022-04-06 22:26:32,576 INFO L913 BasicCegarLoop]: 185 mSDtfsCounter, 173 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 883 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 744 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 22:26:32,576 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 744 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 883 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 22:26:32,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5991 states. [2022-04-06 22:26:34,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5991 to 5989. [2022-04-06 22:26:34,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5989 states, 3873 states have (on average 1.093725793958172) internal successors, (4236), 4019 states have internal predecessors, (4236), 1396 states have call successors, (1396), 720 states have call predecessors, (1396), 719 states have return successors, (1393), 1249 states have call predecessors, (1393), 1393 states have call successors, (1393) [2022-04-06 22:26:34,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5989 states to 5989 states and 7025 transitions. [2022-04-06 22:26:34,235 INFO L78 Accepts]: Start accepts. Automaton has 5989 states and 7025 transitions. Word has length 992 [2022-04-06 22:26:34,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:26:34,235 INFO L478 AbstractCegarLoop]: Abstraction has 5989 states and 7025 transitions. [2022-04-06 22:26:34,235 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 6.709090909090909) internal successors, (369), 54 states have internal predecessors, (369), 54 states have call successors, (158), 54 states have call predecessors, (158), 52 states have return successors, (156), 52 states have call predecessors, (156), 53 states have call successors, (156) [2022-04-06 22:26:34,235 INFO L276 IsEmpty]: Start isEmpty. Operand 5989 states and 7025 transitions. [2022-04-06 22:26:34,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1012 [2022-04-06 22:26:34,246 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:26:34,247 INFO L499 BasicCegarLoop]: trace histogram [157, 156, 156, 53, 52, 52, 52, 52, 52, 52, 52, 52, 52, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:26:34,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-04-06 22:26:34,447 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:26:34,447 INFO L403 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:26:34,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:26:34,448 INFO L85 PathProgramCache]: Analyzing trace with hash -916271455, now seen corresponding path program 103 times [2022-04-06 22:26:34,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:26:34,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [520456607] [2022-04-06 22:26:34,449 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:26:34,449 INFO L85 PathProgramCache]: Analyzing trace with hash -916271455, now seen corresponding path program 104 times [2022-04-06 22:26:34,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:26:34,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107650601] [2022-04-06 22:26:34,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:26:34,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:26:34,473 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:26:34,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [256034446] [2022-04-06 22:26:34,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:26:34,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:26:34,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:26:34,474 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:26:34,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-04-06 22:26:34,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:26:34,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:26:34,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 2179 conjuncts, 109 conjunts are in the unsatisfiable core [2022-04-06 22:26:34,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:26:36,851 INFO L134 CoverageAnalysis]: Checked inductivity of 58062 backedges. 312 proven. 57122 refuted. 0 times theorem prover too weak. 628 trivial. 0 not checked. [2022-04-06 22:26:36,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:26:40,111 INFO L134 CoverageAnalysis]: Checked inductivity of 58062 backedges. 312 proven. 9386 refuted. 0 times theorem prover too weak. 48364 trivial. 0 not checked. [2022-04-06 22:26:40,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:26:40,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107650601] [2022-04-06 22:26:40,112 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:26:40,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256034446] [2022-04-06 22:26:40,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256034446] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:26:40,112 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:26:40,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 104 [2022-04-06 22:26:40,112 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:26:40,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [520456607] [2022-04-06 22:26:40,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [520456607] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:26:40,112 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:26:40,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-04-06 22:26:40,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704868554] [2022-04-06 22:26:40,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:26:40,113 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-04-06 22:26:40,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:26:40,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-04-06 22:26:40,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-04-06 22:26:40,116 INFO L87 Difference]: Start difference. First operand 5989 states and 7025 transitions. Second operand has 56 states, 56 states have (on average 6.714285714285714) internal successors, (376), 55 states have internal predecessors, (376), 55 states have call successors, (161), 55 states have call predecessors, (161), 53 states have return successors, (159), 53 states have call predecessors, (159), 54 states have call successors, (159) [2022-04-06 22:26:43,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:26:43,433 INFO L93 Difference]: Finished difference Result 6118 states and 7186 transitions. [2022-04-06 22:26:43,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-04-06 22:26:43,433 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 6.714285714285714) internal successors, (376), 55 states have internal predecessors, (376), 55 states have call successors, (161), 55 states have call predecessors, (161), 53 states have return successors, (159), 53 states have call predecessors, (159), 54 states have call successors, (159) Word has length 1011 [2022-04-06 22:26:43,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:26:43,444 INFO L225 Difference]: With dead ends: 6118 [2022-04-06 22:26:43,444 INFO L226 Difference]: Without dead ends: 6109 [2022-04-06 22:26:43,446 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 2073 GetRequests, 1918 SyntacticMatches, 1 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1524 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=10512, Invalid=13668, Unknown=0, NotChecked=0, Total=24180 [2022-04-06 22:26:43,447 INFO L913 BasicCegarLoop]: 188 mSDtfsCounter, 214 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 789 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 736 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 22:26:43,447 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 736 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 789 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 22:26:43,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6109 states. [2022-04-06 22:26:45,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6109 to 6107. [2022-04-06 22:26:45,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6107 states, 3949 states have (on average 1.0936946062294253) internal successors, (4319), 4098 states have internal predecessors, (4319), 1424 states have call successors, (1424), 734 states have call predecessors, (1424), 733 states have return successors, (1421), 1274 states have call predecessors, (1421), 1421 states have call successors, (1421) [2022-04-06 22:26:45,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6107 states to 6107 states and 7164 transitions. [2022-04-06 22:26:45,284 INFO L78 Accepts]: Start accepts. Automaton has 6107 states and 7164 transitions. Word has length 1011 [2022-04-06 22:26:45,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:26:45,285 INFO L478 AbstractCegarLoop]: Abstraction has 6107 states and 7164 transitions. [2022-04-06 22:26:45,285 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 6.714285714285714) internal successors, (376), 55 states have internal predecessors, (376), 55 states have call successors, (161), 55 states have call predecessors, (161), 53 states have return successors, (159), 53 states have call predecessors, (159), 54 states have call successors, (159) [2022-04-06 22:26:45,285 INFO L276 IsEmpty]: Start isEmpty. Operand 6107 states and 7164 transitions. [2022-04-06 22:26:45,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1031 [2022-04-06 22:26:45,297 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:26:45,297 INFO L499 BasicCegarLoop]: trace histogram [160, 159, 159, 54, 53, 53, 53, 53, 53, 53, 53, 53, 53, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:26:45,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-04-06 22:26:45,497 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2022-04-06 22:26:45,498 INFO L403 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:26:45,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:26:45,498 INFO L85 PathProgramCache]: Analyzing trace with hash 630979666, now seen corresponding path program 105 times [2022-04-06 22:26:45,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:26:45,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1445230865] [2022-04-06 22:26:45,499 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:26:45,499 INFO L85 PathProgramCache]: Analyzing trace with hash 630979666, now seen corresponding path program 106 times [2022-04-06 22:26:45,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:26:45,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078846303] [2022-04-06 22:26:45,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:26:45,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:26:45,515 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:26:45,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [200003112] [2022-04-06 22:26:45,515 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 22:26:45,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:26:45,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:26:45,516 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:26:45,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-04-06 22:26:45,844 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 22:26:45,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:26:45,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 2219 conjuncts, 111 conjunts are in the unsatisfiable core [2022-04-06 22:26:45,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:26:48,013 INFO L134 CoverageAnalysis]: Checked inductivity of 60318 backedges. 318 proven. 59360 refuted. 0 times theorem prover too weak. 640 trivial. 0 not checked. [2022-04-06 22:26:48,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:26:51,227 INFO L134 CoverageAnalysis]: Checked inductivity of 60318 backedges. 318 proven. 9752 refuted. 0 times theorem prover too weak. 50248 trivial. 0 not checked. [2022-04-06 22:26:51,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:26:51,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078846303] [2022-04-06 22:26:51,228 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:26:51,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200003112] [2022-04-06 22:26:51,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200003112] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:26:51,228 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:26:51,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 104 [2022-04-06 22:26:51,228 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:26:51,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1445230865] [2022-04-06 22:26:51,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1445230865] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:26:51,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:26:51,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-04-06 22:26:51,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359300847] [2022-04-06 22:26:51,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:26:51,229 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-04-06 22:26:51,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:26:51,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-04-06 22:26:51,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-04-06 22:26:51,232 INFO L87 Difference]: Start difference. First operand 6107 states and 7164 transitions. Second operand has 57 states, 57 states have (on average 6.719298245614035) internal successors, (383), 56 states have internal predecessors, (383), 56 states have call successors, (164), 56 states have call predecessors, (164), 54 states have return successors, (162), 54 states have call predecessors, (162), 55 states have call successors, (162) [2022-04-06 22:26:54,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:26:54,607 INFO L93 Difference]: Finished difference Result 6236 states and 7325 transitions. [2022-04-06 22:26:54,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-04-06 22:26:54,608 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 6.719298245614035) internal successors, (383), 56 states have internal predecessors, (383), 56 states have call successors, (164), 56 states have call predecessors, (164), 54 states have return successors, (162), 54 states have call predecessors, (162), 55 states have call successors, (162) Word has length 1030 [2022-04-06 22:26:54,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:26:54,617 INFO L225 Difference]: With dead ends: 6236 [2022-04-06 22:26:54,617 INFO L226 Difference]: Without dead ends: 6227 [2022-04-06 22:26:54,619 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 2112 GetRequests, 1956 SyntacticMatches, 1 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1576 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=10615, Invalid=13877, Unknown=0, NotChecked=0, Total=24492 [2022-04-06 22:26:54,619 INFO L913 BasicCegarLoop]: 191 mSDtfsCounter, 252 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 22:26:54,620 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 738 Invalid, 805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 770 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 22:26:54,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6227 states. [2022-04-06 22:26:56,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6227 to 6225. [2022-04-06 22:26:56,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6225 states, 4025 states have (on average 1.0936645962732918) internal successors, (4402), 4177 states have internal predecessors, (4402), 1452 states have call successors, (1452), 748 states have call predecessors, (1452), 747 states have return successors, (1449), 1299 states have call predecessors, (1449), 1449 states have call successors, (1449) [2022-04-06 22:26:56,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6225 states to 6225 states and 7303 transitions. [2022-04-06 22:26:56,339 INFO L78 Accepts]: Start accepts. Automaton has 6225 states and 7303 transitions. Word has length 1030 [2022-04-06 22:26:56,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:26:56,339 INFO L478 AbstractCegarLoop]: Abstraction has 6225 states and 7303 transitions. [2022-04-06 22:26:56,340 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 6.719298245614035) internal successors, (383), 56 states have internal predecessors, (383), 56 states have call successors, (164), 56 states have call predecessors, (164), 54 states have return successors, (162), 54 states have call predecessors, (162), 55 states have call successors, (162) [2022-04-06 22:26:56,340 INFO L276 IsEmpty]: Start isEmpty. Operand 6225 states and 7303 transitions. [2022-04-06 22:26:56,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1050 [2022-04-06 22:26:56,353 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:26:56,353 INFO L499 BasicCegarLoop]: trace histogram [163, 162, 162, 55, 54, 54, 54, 54, 54, 54, 54, 54, 54, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:26:56,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-04-06 22:26:56,553 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:26:56,553 INFO L403 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:26:56,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:26:56,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1638471935, now seen corresponding path program 107 times [2022-04-06 22:26:56,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:26:56,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1198012763] [2022-04-06 22:26:56,554 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:26:56,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1638471935, now seen corresponding path program 108 times [2022-04-06 22:26:56,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:26:56,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134771471] [2022-04-06 22:26:56,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:26:56,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:26:56,569 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:26:56,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [807488001] [2022-04-06 22:26:56,569 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 22:26:56,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:26:56,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:26:56,570 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:26:56,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-04-06 22:27:11,646 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 103 check-sat command(s) [2022-04-06 22:27:11,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:27:11,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 2250 conjuncts, 113 conjunts are in the unsatisfiable core [2022-04-06 22:27:11,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:27:13,857 INFO L134 CoverageAnalysis]: Checked inductivity of 62617 backedges. 324 proven. 61641 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2022-04-06 22:27:13,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:27:17,032 INFO L134 CoverageAnalysis]: Checked inductivity of 62617 backedges. 324 proven. 10125 refuted. 0 times theorem prover too weak. 52168 trivial. 0 not checked. [2022-04-06 22:27:17,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:27:17,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134771471] [2022-04-06 22:27:17,032 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:27:17,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807488001] [2022-04-06 22:27:17,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807488001] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:27:17,032 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:27:17,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 104 [2022-04-06 22:27:17,033 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:27:17,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1198012763] [2022-04-06 22:27:17,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1198012763] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:27:17,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:27:17,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-04-06 22:27:17,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875009573] [2022-04-06 22:27:17,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:27:17,034 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-04-06 22:27:17,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:27:17,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-04-06 22:27:17,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-04-06 22:27:17,037 INFO L87 Difference]: Start difference. First operand 6225 states and 7303 transitions. Second operand has 58 states, 58 states have (on average 6.724137931034483) internal successors, (390), 57 states have internal predecessors, (390), 57 states have call successors, (167), 57 states have call predecessors, (167), 55 states have return successors, (165), 55 states have call predecessors, (165), 56 states have call successors, (165) [2022-04-06 22:27:20,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:27:20,596 INFO L93 Difference]: Finished difference Result 6354 states and 7464 transitions. [2022-04-06 22:27:20,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-04-06 22:27:20,596 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 6.724137931034483) internal successors, (390), 57 states have internal predecessors, (390), 57 states have call successors, (167), 57 states have call predecessors, (167), 55 states have return successors, (165), 55 states have call predecessors, (165), 56 states have call successors, (165) Word has length 1049 [2022-04-06 22:27:20,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:27:20,608 INFO L225 Difference]: With dead ends: 6354 [2022-04-06 22:27:20,608 INFO L226 Difference]: Without dead ends: 6345 [2022-04-06 22:27:20,610 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 2151 GetRequests, 1994 SyntacticMatches, 1 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1629 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=10718, Invalid=14088, Unknown=0, NotChecked=0, Total=24806 [2022-04-06 22:27:20,610 INFO L913 BasicCegarLoop]: 194 mSDtfsCounter, 200 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 946 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 780 SdHoareTripleChecker+Invalid, 967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 22:27:20,610 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 780 Invalid, 967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 946 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 22:27:20,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6345 states. [2022-04-06 22:27:22,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6345 to 6343. [2022-04-06 22:27:22,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6343 states, 4101 states have (on average 1.093635698610095) internal successors, (4485), 4256 states have internal predecessors, (4485), 1480 states have call successors, (1480), 762 states have call predecessors, (1480), 761 states have return successors, (1477), 1324 states have call predecessors, (1477), 1477 states have call successors, (1477) [2022-04-06 22:27:22,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6343 states to 6343 states and 7442 transitions. [2022-04-06 22:27:22,425 INFO L78 Accepts]: Start accepts. Automaton has 6343 states and 7442 transitions. Word has length 1049 [2022-04-06 22:27:22,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:27:22,426 INFO L478 AbstractCegarLoop]: Abstraction has 6343 states and 7442 transitions. [2022-04-06 22:27:22,426 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 6.724137931034483) internal successors, (390), 57 states have internal predecessors, (390), 57 states have call successors, (167), 57 states have call predecessors, (167), 55 states have return successors, (165), 55 states have call predecessors, (165), 56 states have call successors, (165) [2022-04-06 22:27:22,426 INFO L276 IsEmpty]: Start isEmpty. Operand 6343 states and 7442 transitions. [2022-04-06 22:27:22,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1069 [2022-04-06 22:27:22,439 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:27:22,439 INFO L499 BasicCegarLoop]: trace histogram [166, 165, 165, 56, 55, 55, 55, 55, 55, 55, 55, 55, 55, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:27:22,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-04-06 22:27:22,640 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:27:22,640 INFO L403 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:27:22,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:27:22,640 INFO L85 PathProgramCache]: Analyzing trace with hash 754010098, now seen corresponding path program 109 times [2022-04-06 22:27:22,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:27:22,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [826288873] [2022-04-06 22:27:22,641 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:27:22,641 INFO L85 PathProgramCache]: Analyzing trace with hash 754010098, now seen corresponding path program 110 times [2022-04-06 22:27:22,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:27:22,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346202965] [2022-04-06 22:27:22,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:27:22,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:27:22,656 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:27:22,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1024698658] [2022-04-06 22:27:22,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:27:22,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:27:22,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:27:22,657 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:27:22,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-04-06 22:27:22,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:27:22,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:27:22,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 2299 conjuncts, 115 conjunts are in the unsatisfiable core [2022-04-06 22:27:22,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:27:25,158 INFO L134 CoverageAnalysis]: Checked inductivity of 64959 backedges. 330 proven. 63965 refuted. 0 times theorem prover too weak. 664 trivial. 0 not checked. [2022-04-06 22:27:25,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:27:28,368 INFO L134 CoverageAnalysis]: Checked inductivity of 64959 backedges. 330 proven. 10505 refuted. 0 times theorem prover too weak. 54124 trivial. 0 not checked. [2022-04-06 22:27:28,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:27:28,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346202965] [2022-04-06 22:27:28,369 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:27:28,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024698658] [2022-04-06 22:27:28,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024698658] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:27:28,369 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:27:28,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 104 [2022-04-06 22:27:28,370 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:27:28,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [826288873] [2022-04-06 22:27:28,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [826288873] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:27:28,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:27:28,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-04-06 22:27:28,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781432571] [2022-04-06 22:27:28,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:27:28,370 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-04-06 22:27:28,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:27:28,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-04-06 22:27:28,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-04-06 22:27:28,373 INFO L87 Difference]: Start difference. First operand 6343 states and 7442 transitions. Second operand has 59 states, 59 states have (on average 6.728813559322034) internal successors, (397), 58 states have internal predecessors, (397), 58 states have call successors, (170), 58 states have call predecessors, (170), 56 states have return successors, (168), 56 states have call predecessors, (168), 57 states have call successors, (168) [2022-04-06 22:27:32,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:27:32,007 INFO L93 Difference]: Finished difference Result 6472 states and 7603 transitions. [2022-04-06 22:27:32,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-04-06 22:27:32,007 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 6.728813559322034) internal successors, (397), 58 states have internal predecessors, (397), 58 states have call successors, (170), 58 states have call predecessors, (170), 56 states have return successors, (168), 56 states have call predecessors, (168), 57 states have call successors, (168) Word has length 1068 [2022-04-06 22:27:32,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:27:32,018 INFO L225 Difference]: With dead ends: 6472 [2022-04-06 22:27:32,018 INFO L226 Difference]: Without dead ends: 6463 [2022-04-06 22:27:32,020 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 2190 GetRequests, 2032 SyntacticMatches, 1 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1683 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=10821, Invalid=14301, Unknown=0, NotChecked=0, Total=25122 [2022-04-06 22:27:32,021 INFO L913 BasicCegarLoop]: 197 mSDtfsCounter, 200 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 933 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 792 SdHoareTripleChecker+Invalid, 954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 22:27:32,021 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 792 Invalid, 954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 933 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 22:27:32,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6463 states. [2022-04-06 22:27:33,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6463 to 6461. [2022-04-06 22:27:33,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6461 states, 4177 states have (on average 1.0936078525257362) internal successors, (4568), 4335 states have internal predecessors, (4568), 1508 states have call successors, (1508), 776 states have call predecessors, (1508), 775 states have return successors, (1505), 1349 states have call predecessors, (1505), 1505 states have call successors, (1505) [2022-04-06 22:27:33,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6461 states to 6461 states and 7581 transitions. [2022-04-06 22:27:33,895 INFO L78 Accepts]: Start accepts. Automaton has 6461 states and 7581 transitions. Word has length 1068 [2022-04-06 22:27:33,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:27:33,895 INFO L478 AbstractCegarLoop]: Abstraction has 6461 states and 7581 transitions. [2022-04-06 22:27:33,896 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 6.728813559322034) internal successors, (397), 58 states have internal predecessors, (397), 58 states have call successors, (170), 58 states have call predecessors, (170), 56 states have return successors, (168), 56 states have call predecessors, (168), 57 states have call successors, (168) [2022-04-06 22:27:33,896 INFO L276 IsEmpty]: Start isEmpty. Operand 6461 states and 7581 transitions. [2022-04-06 22:27:33,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1088 [2022-04-06 22:27:33,928 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:27:33,928 INFO L499 BasicCegarLoop]: trace histogram [169, 168, 168, 57, 56, 56, 56, 56, 56, 56, 56, 56, 56, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:27:33,952 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-04-06 22:27:34,128 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:27:34,129 INFO L403 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:27:34,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:27:34,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1814710431, now seen corresponding path program 111 times [2022-04-06 22:27:34,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:27:34,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1963103004] [2022-04-06 22:27:34,130 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:27:34,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1814710431, now seen corresponding path program 112 times [2022-04-06 22:27:34,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:27:34,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704251363] [2022-04-06 22:27:34,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:27:34,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:27:34,145 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:27:34,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [84104561] [2022-04-06 22:27:34,145 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 22:27:34,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:27:34,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:27:34,146 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:27:34,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-04-06 22:27:34,477 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 22:27:34,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:27:34,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 2339 conjuncts, 117 conjunts are in the unsatisfiable core [2022-04-06 22:27:34,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:27:36,762 INFO L134 CoverageAnalysis]: Checked inductivity of 67344 backedges. 336 proven. 66332 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2022-04-06 22:27:36,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:27:40,001 INFO L134 CoverageAnalysis]: Checked inductivity of 67344 backedges. 336 proven. 10892 refuted. 0 times theorem prover too weak. 56116 trivial. 0 not checked. [2022-04-06 22:27:40,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:27:40,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704251363] [2022-04-06 22:27:40,001 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:27:40,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84104561] [2022-04-06 22:27:40,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84104561] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:27:40,001 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:27:40,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 104 [2022-04-06 22:27:40,002 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:27:40,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1963103004] [2022-04-06 22:27:40,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1963103004] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:27:40,002 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:27:40,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-04-06 22:27:40,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32550881] [2022-04-06 22:27:40,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:27:40,003 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-04-06 22:27:40,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:27:40,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-04-06 22:27:40,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-04-06 22:27:40,006 INFO L87 Difference]: Start difference. First operand 6461 states and 7581 transitions. Second operand has 60 states, 60 states have (on average 6.733333333333333) internal successors, (404), 59 states have internal predecessors, (404), 59 states have call successors, (173), 59 states have call predecessors, (173), 57 states have return successors, (171), 57 states have call predecessors, (171), 58 states have call successors, (171) [2022-04-06 22:27:43,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:27:43,784 INFO L93 Difference]: Finished difference Result 6590 states and 7742 transitions. [2022-04-06 22:27:43,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-04-06 22:27:43,785 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 6.733333333333333) internal successors, (404), 59 states have internal predecessors, (404), 59 states have call successors, (173), 59 states have call predecessors, (173), 57 states have return successors, (171), 57 states have call predecessors, (171), 58 states have call successors, (171) Word has length 1087 [2022-04-06 22:27:43,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:27:43,795 INFO L225 Difference]: With dead ends: 6590 [2022-04-06 22:27:43,795 INFO L226 Difference]: Without dead ends: 6581 [2022-04-06 22:27:43,797 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 2229 GetRequests, 2070 SyntacticMatches, 1 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1738 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=10924, Invalid=14516, Unknown=0, NotChecked=0, Total=25440 [2022-04-06 22:27:43,797 INFO L913 BasicCegarLoop]: 200 mSDtfsCounter, 246 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 896 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 764 SdHoareTripleChecker+Invalid, 938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 22:27:43,797 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 764 Invalid, 938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 896 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 22:27:43,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6581 states. [2022-04-06 22:27:45,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6581 to 6579. [2022-04-06 22:27:45,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6579 states, 4253 states have (on average 1.093581001645897) internal successors, (4651), 4414 states have internal predecessors, (4651), 1536 states have call successors, (1536), 790 states have call predecessors, (1536), 789 states have return successors, (1533), 1374 states have call predecessors, (1533), 1533 states have call successors, (1533) [2022-04-06 22:27:45,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6579 states to 6579 states and 7720 transitions. [2022-04-06 22:27:45,747 INFO L78 Accepts]: Start accepts. Automaton has 6579 states and 7720 transitions. Word has length 1087 [2022-04-06 22:27:45,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:27:45,748 INFO L478 AbstractCegarLoop]: Abstraction has 6579 states and 7720 transitions. [2022-04-06 22:27:45,748 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 6.733333333333333) internal successors, (404), 59 states have internal predecessors, (404), 59 states have call successors, (173), 59 states have call predecessors, (173), 57 states have return successors, (171), 57 states have call predecessors, (171), 58 states have call successors, (171) [2022-04-06 22:27:45,748 INFO L276 IsEmpty]: Start isEmpty. Operand 6579 states and 7720 transitions. [2022-04-06 22:27:45,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1107 [2022-04-06 22:27:45,765 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:27:45,765 INFO L499 BasicCegarLoop]: trace histogram [172, 171, 171, 58, 57, 57, 57, 57, 57, 57, 57, 57, 57, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:27:45,789 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2022-04-06 22:27:45,975 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:27:45,975 INFO L403 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:27:45,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:27:45,976 INFO L85 PathProgramCache]: Analyzing trace with hash -175055982, now seen corresponding path program 113 times [2022-04-06 22:27:45,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:27:45,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [513346861] [2022-04-06 22:27:45,976 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:27:45,976 INFO L85 PathProgramCache]: Analyzing trace with hash -175055982, now seen corresponding path program 114 times [2022-04-06 22:27:45,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:27:45,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545929102] [2022-04-06 22:27:45,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:27:45,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:27:45,991 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:27:45,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [97579754] [2022-04-06 22:27:45,992 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 22:27:45,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:27:45,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:27:45,993 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:27:45,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-04-06 22:27:50,586 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 111 check-sat command(s) [2022-04-06 22:27:50,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:27:50,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 2379 conjuncts, 119 conjunts are in the unsatisfiable core [2022-04-06 22:27:50,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:27:53,080 INFO L134 CoverageAnalysis]: Checked inductivity of 69772 backedges. 342 proven. 68742 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2022-04-06 22:27:53,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:27:56,287 INFO L134 CoverageAnalysis]: Checked inductivity of 69772 backedges. 342 proven. 11286 refuted. 0 times theorem prover too weak. 58144 trivial. 0 not checked. [2022-04-06 22:27:56,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:27:56,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545929102] [2022-04-06 22:27:56,288 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:27:56,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97579754] [2022-04-06 22:27:56,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97579754] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:27:56,288 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:27:56,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 104 [2022-04-06 22:27:56,288 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:27:56,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [513346861] [2022-04-06 22:27:56,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [513346861] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:27:56,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:27:56,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-04-06 22:27:56,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363049981] [2022-04-06 22:27:56,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:27:56,289 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-04-06 22:27:56,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:27:56,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-04-06 22:27:56,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-04-06 22:27:56,291 INFO L87 Difference]: Start difference. First operand 6579 states and 7720 transitions. Second operand has 61 states, 61 states have (on average 6.737704918032787) internal successors, (411), 60 states have internal predecessors, (411), 60 states have call successors, (176), 60 states have call predecessors, (176), 58 states have return successors, (174), 58 states have call predecessors, (174), 59 states have call successors, (174) [2022-04-06 22:27:59,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:27:59,956 INFO L93 Difference]: Finished difference Result 6708 states and 7881 transitions. [2022-04-06 22:27:59,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-04-06 22:27:59,957 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 6.737704918032787) internal successors, (411), 60 states have internal predecessors, (411), 60 states have call successors, (176), 60 states have call predecessors, (176), 58 states have return successors, (174), 58 states have call predecessors, (174), 59 states have call successors, (174) Word has length 1106 [2022-04-06 22:27:59,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:27:59,968 INFO L225 Difference]: With dead ends: 6708 [2022-04-06 22:27:59,968 INFO L226 Difference]: Without dead ends: 6699 [2022-04-06 22:27:59,970 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 2268 GetRequests, 2108 SyntacticMatches, 1 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1794 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=11027, Invalid=14733, Unknown=0, NotChecked=0, Total=25760 [2022-04-06 22:27:59,970 INFO L913 BasicCegarLoop]: 203 mSDtfsCounter, 224 mSDsluCounter, 623 mSDsCounter, 0 mSdLazyCounter, 961 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 826 SdHoareTripleChecker+Invalid, 1003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 22:27:59,970 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 826 Invalid, 1003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 961 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 22:27:59,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6699 states. [2022-04-06 22:28:01,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6699 to 6697. [2022-04-06 22:28:01,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6697 states, 4329 states have (on average 1.0935550935550935) internal successors, (4734), 4493 states have internal predecessors, (4734), 1564 states have call successors, (1564), 804 states have call predecessors, (1564), 803 states have return successors, (1561), 1399 states have call predecessors, (1561), 1561 states have call successors, (1561) [2022-04-06 22:28:01,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6697 states to 6697 states and 7859 transitions. [2022-04-06 22:28:01,760 INFO L78 Accepts]: Start accepts. Automaton has 6697 states and 7859 transitions. Word has length 1106 [2022-04-06 22:28:01,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:28:01,761 INFO L478 AbstractCegarLoop]: Abstraction has 6697 states and 7859 transitions. [2022-04-06 22:28:01,761 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 6.737704918032787) internal successors, (411), 60 states have internal predecessors, (411), 60 states have call successors, (176), 60 states have call predecessors, (176), 58 states have return successors, (174), 58 states have call predecessors, (174), 59 states have call successors, (174) [2022-04-06 22:28:01,761 INFO L276 IsEmpty]: Start isEmpty. Operand 6697 states and 7859 transitions. [2022-04-06 22:28:01,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1126 [2022-04-06 22:28:01,776 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:28:01,776 INFO L499 BasicCegarLoop]: trace histogram [175, 174, 174, 59, 58, 58, 58, 58, 58, 58, 58, 58, 58, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:28:01,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-04-06 22:28:01,976 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:28:01,976 INFO L403 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:28:01,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:28:01,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1542111295, now seen corresponding path program 115 times [2022-04-06 22:28:01,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:28:01,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2024311146] [2022-04-06 22:28:01,977 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:28:01,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1542111295, now seen corresponding path program 116 times [2022-04-06 22:28:01,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:28:01,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279287619] [2022-04-06 22:28:01,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:28:01,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:28:01,993 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:28:01,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [731588975] [2022-04-06 22:28:01,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:28:01,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:28:01,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:28:01,994 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:28:01,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-04-06 22:28:02,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:28:02,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:28:02,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 2419 conjuncts, 121 conjunts are in the unsatisfiable core [2022-04-06 22:28:02,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:28:04,676 INFO L134 CoverageAnalysis]: Checked inductivity of 72243 backedges. 348 proven. 71195 refuted. 0 times theorem prover too weak. 700 trivial. 0 not checked. [2022-04-06 22:28:04,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:28:07,844 INFO L134 CoverageAnalysis]: Checked inductivity of 72243 backedges. 348 proven. 11687 refuted. 0 times theorem prover too weak. 60208 trivial. 0 not checked. [2022-04-06 22:28:07,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:28:07,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279287619] [2022-04-06 22:28:07,845 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:28:07,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731588975] [2022-04-06 22:28:07,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731588975] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:28:07,845 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:28:07,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 104 [2022-04-06 22:28:07,846 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:28:07,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2024311146] [2022-04-06 22:28:07,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2024311146] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:28:07,846 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:28:07,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-04-06 22:28:07,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860150430] [2022-04-06 22:28:07,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:28:07,846 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-04-06 22:28:07,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:28:07,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-04-06 22:28:07,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-04-06 22:28:07,849 INFO L87 Difference]: Start difference. First operand 6697 states and 7859 transitions. Second operand has 62 states, 62 states have (on average 6.741935483870968) internal successors, (418), 61 states have internal predecessors, (418), 61 states have call successors, (179), 61 states have call predecessors, (179), 59 states have return successors, (177), 59 states have call predecessors, (177), 60 states have call successors, (177) [2022-04-06 22:28:11,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:28:11,670 INFO L93 Difference]: Finished difference Result 6826 states and 8020 transitions. [2022-04-06 22:28:11,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-04-06 22:28:11,670 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 6.741935483870968) internal successors, (418), 61 states have internal predecessors, (418), 61 states have call successors, (179), 61 states have call predecessors, (179), 59 states have return successors, (177), 59 states have call predecessors, (177), 60 states have call successors, (177) Word has length 1125 [2022-04-06 22:28:11,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:28:11,681 INFO L225 Difference]: With dead ends: 6826 [2022-04-06 22:28:11,681 INFO L226 Difference]: Without dead ends: 6817 [2022-04-06 22:28:11,683 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 2307 GetRequests, 2146 SyntacticMatches, 1 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1851 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=11130, Invalid=14952, Unknown=0, NotChecked=0, Total=26082 [2022-04-06 22:28:11,683 INFO L913 BasicCegarLoop]: 206 mSDtfsCounter, 205 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 1062 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 828 SdHoareTripleChecker+Invalid, 1090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 22:28:11,683 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 828 Invalid, 1090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1062 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 22:28:11,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6817 states. [2022-04-06 22:28:13,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6817 to 6815. [2022-04-06 22:28:13,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6815 states, 4405 states have (on average 1.0935300794551646) internal successors, (4817), 4572 states have internal predecessors, (4817), 1592 states have call successors, (1592), 818 states have call predecessors, (1592), 817 states have return successors, (1589), 1424 states have call predecessors, (1589), 1589 states have call successors, (1589) [2022-04-06 22:28:13,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6815 states to 6815 states and 7998 transitions. [2022-04-06 22:28:13,507 INFO L78 Accepts]: Start accepts. Automaton has 6815 states and 7998 transitions. Word has length 1125 [2022-04-06 22:28:13,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:28:13,508 INFO L478 AbstractCegarLoop]: Abstraction has 6815 states and 7998 transitions. [2022-04-06 22:28:13,508 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 6.741935483870968) internal successors, (418), 61 states have internal predecessors, (418), 61 states have call successors, (179), 61 states have call predecessors, (179), 59 states have return successors, (177), 59 states have call predecessors, (177), 60 states have call successors, (177) [2022-04-06 22:28:13,508 INFO L276 IsEmpty]: Start isEmpty. Operand 6815 states and 7998 transitions. [2022-04-06 22:28:13,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1145 [2022-04-06 22:28:13,522 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:28:13,522 INFO L499 BasicCegarLoop]: trace histogram [178, 177, 177, 60, 59, 59, 59, 59, 59, 59, 59, 59, 59, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:28:13,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-04-06 22:28:13,722 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-04-06 22:28:13,722 INFO L403 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:28:13,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:28:13,723 INFO L85 PathProgramCache]: Analyzing trace with hash 2105849650, now seen corresponding path program 117 times [2022-04-06 22:28:13,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:28:13,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [770265982] [2022-04-06 22:28:13,724 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:28:13,724 INFO L85 PathProgramCache]: Analyzing trace with hash 2105849650, now seen corresponding path program 118 times [2022-04-06 22:28:13,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:28:13,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420628558] [2022-04-06 22:28:13,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:28:13,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:28:13,740 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:28:13,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [405030894] [2022-04-06 22:28:13,740 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 22:28:13,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:28:13,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:28:13,741 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:28:13,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-04-06 22:28:14,083 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 22:28:14,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:28:14,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 2459 conjuncts, 123 conjunts are in the unsatisfiable core [2022-04-06 22:28:14,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:28:16,566 INFO L134 CoverageAnalysis]: Checked inductivity of 74757 backedges. 354 proven. 73691 refuted. 0 times theorem prover too weak. 712 trivial. 0 not checked. [2022-04-06 22:28:16,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:28:19,621 INFO L134 CoverageAnalysis]: Checked inductivity of 74757 backedges. 354 proven. 12095 refuted. 0 times theorem prover too weak. 62308 trivial. 0 not checked. [2022-04-06 22:28:19,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:28:19,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420628558] [2022-04-06 22:28:19,622 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:28:19,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405030894] [2022-04-06 22:28:19,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405030894] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:28:19,622 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:28:19,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 104 [2022-04-06 22:28:19,622 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:28:19,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [770265982] [2022-04-06 22:28:19,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [770265982] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:28:19,622 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:28:19,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-04-06 22:28:19,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890644423] [2022-04-06 22:28:19,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:28:19,623 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-04-06 22:28:19,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:28:19,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-04-06 22:28:19,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-04-06 22:28:19,625 INFO L87 Difference]: Start difference. First operand 6815 states and 7998 transitions. Second operand has 63 states, 63 states have (on average 6.746031746031746) internal successors, (425), 62 states have internal predecessors, (425), 62 states have call successors, (182), 62 states have call predecessors, (182), 60 states have return successors, (180), 60 states have call predecessors, (180), 61 states have call successors, (180) [2022-04-06 22:28:23,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:28:23,667 INFO L93 Difference]: Finished difference Result 6944 states and 8159 transitions. [2022-04-06 22:28:23,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-04-06 22:28:23,667 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 6.746031746031746) internal successors, (425), 62 states have internal predecessors, (425), 62 states have call successors, (182), 62 states have call predecessors, (182), 60 states have return successors, (180), 60 states have call predecessors, (180), 61 states have call successors, (180) Word has length 1144 [2022-04-06 22:28:23,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:28:23,678 INFO L225 Difference]: With dead ends: 6944 [2022-04-06 22:28:23,678 INFO L226 Difference]: Without dead ends: 6935 [2022-04-06 22:28:23,680 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 2346 GetRequests, 2184 SyntacticMatches, 1 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1909 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=11233, Invalid=15173, Unknown=0, NotChecked=0, Total=26406 [2022-04-06 22:28:23,681 INFO L913 BasicCegarLoop]: 209 mSDtfsCounter, 216 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 1061 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 820 SdHoareTripleChecker+Invalid, 1075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 22:28:23,681 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 820 Invalid, 1075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1061 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 22:28:23,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6935 states. [2022-04-06 22:28:25,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6935 to 6933. [2022-04-06 22:28:25,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6933 states, 4481 states have (on average 1.0935059138585137) internal successors, (4900), 4651 states have internal predecessors, (4900), 1620 states have call successors, (1620), 832 states have call predecessors, (1620), 831 states have return successors, (1617), 1449 states have call predecessors, (1617), 1617 states have call successors, (1617) [2022-04-06 22:28:25,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6933 states to 6933 states and 8137 transitions. [2022-04-06 22:28:25,545 INFO L78 Accepts]: Start accepts. Automaton has 6933 states and 8137 transitions. Word has length 1144 [2022-04-06 22:28:25,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:28:25,546 INFO L478 AbstractCegarLoop]: Abstraction has 6933 states and 8137 transitions. [2022-04-06 22:28:25,546 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 6.746031746031746) internal successors, (425), 62 states have internal predecessors, (425), 62 states have call successors, (182), 62 states have call predecessors, (182), 60 states have return successors, (180), 60 states have call predecessors, (180), 61 states have call successors, (180) [2022-04-06 22:28:25,546 INFO L276 IsEmpty]: Start isEmpty. Operand 6933 states and 8137 transitions. [2022-04-06 22:28:25,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1164 [2022-04-06 22:28:25,560 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:28:25,560 INFO L499 BasicCegarLoop]: trace histogram [181, 180, 180, 61, 60, 60, 60, 60, 60, 60, 60, 60, 60, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:28:25,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-04-06 22:28:25,761 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:28:25,761 INFO L403 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:28:25,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:28:25,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1892384801, now seen corresponding path program 119 times [2022-04-06 22:28:25,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:28:25,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [531439537] [2022-04-06 22:28:25,762 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:28:25,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1892384801, now seen corresponding path program 120 times [2022-04-06 22:28:25,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:28:25,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59683984] [2022-04-06 22:28:25,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:28:25,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:28:25,778 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:28:25,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [624134981] [2022-04-06 22:28:25,778 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 22:28:25,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:28:25,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:28:25,779 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:28:25,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-04-06 22:28:34,348 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 117 check-sat command(s) [2022-04-06 22:28:34,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:28:34,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 2499 conjuncts, 125 conjunts are in the unsatisfiable core [2022-04-06 22:28:34,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:28:36,850 INFO L134 CoverageAnalysis]: Checked inductivity of 77314 backedges. 360 proven. 76230 refuted. 0 times theorem prover too weak. 724 trivial. 0 not checked. [2022-04-06 22:28:36,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:28:39,938 INFO L134 CoverageAnalysis]: Checked inductivity of 77314 backedges. 360 proven. 12510 refuted. 0 times theorem prover too weak. 64444 trivial. 0 not checked. [2022-04-06 22:28:39,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:28:39,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59683984] [2022-04-06 22:28:39,938 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:28:39,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624134981] [2022-04-06 22:28:39,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624134981] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:28:39,938 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:28:39,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 104 [2022-04-06 22:28:39,939 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:28:39,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [531439537] [2022-04-06 22:28:39,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [531439537] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:28:39,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:28:39,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-04-06 22:28:39,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796510702] [2022-04-06 22:28:39,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:28:39,940 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-04-06 22:28:39,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:28:39,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-04-06 22:28:39,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-04-06 22:28:39,942 INFO L87 Difference]: Start difference. First operand 6933 states and 8137 transitions. Second operand has 64 states, 64 states have (on average 6.75) internal successors, (432), 63 states have internal predecessors, (432), 63 states have call successors, (185), 63 states have call predecessors, (185), 61 states have return successors, (183), 61 states have call predecessors, (183), 62 states have call successors, (183) [2022-04-06 22:28:43,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:28:43,885 INFO L93 Difference]: Finished difference Result 7062 states and 8298 transitions. [2022-04-06 22:28:43,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-04-06 22:28:43,886 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 6.75) internal successors, (432), 63 states have internal predecessors, (432), 63 states have call successors, (185), 63 states have call predecessors, (185), 61 states have return successors, (183), 61 states have call predecessors, (183), 62 states have call successors, (183) Word has length 1163 [2022-04-06 22:28:43,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:28:43,898 INFO L225 Difference]: With dead ends: 7062 [2022-04-06 22:28:43,898 INFO L226 Difference]: Without dead ends: 7053 [2022-04-06 22:28:43,900 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 2385 GetRequests, 2222 SyntacticMatches, 1 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1968 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=11336, Invalid=15396, Unknown=0, NotChecked=0, Total=26732 [2022-04-06 22:28:43,900 INFO L913 BasicCegarLoop]: 212 mSDtfsCounter, 192 mSDsluCounter, 660 mSDsCounter, 0 mSdLazyCounter, 1090 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 872 SdHoareTripleChecker+Invalid, 1118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 22:28:43,900 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 872 Invalid, 1118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1090 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 22:28:43,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7053 states. [2022-04-06 22:28:45,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7053 to 7051. [2022-04-06 22:28:45,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7051 states, 4557 states have (on average 1.0934825543120474) internal successors, (4983), 4730 states have internal predecessors, (4983), 1648 states have call successors, (1648), 846 states have call predecessors, (1648), 845 states have return successors, (1645), 1474 states have call predecessors, (1645), 1645 states have call successors, (1645) [2022-04-06 22:28:45,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7051 states to 7051 states and 8276 transitions. [2022-04-06 22:28:45,790 INFO L78 Accepts]: Start accepts. Automaton has 7051 states and 8276 transitions. Word has length 1163 [2022-04-06 22:28:45,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:28:45,791 INFO L478 AbstractCegarLoop]: Abstraction has 7051 states and 8276 transitions. [2022-04-06 22:28:45,791 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 6.75) internal successors, (432), 63 states have internal predecessors, (432), 63 states have call successors, (185), 63 states have call predecessors, (185), 61 states have return successors, (183), 61 states have call predecessors, (183), 62 states have call successors, (183) [2022-04-06 22:28:45,791 INFO L276 IsEmpty]: Start isEmpty. Operand 7051 states and 8276 transitions. [2022-04-06 22:28:45,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1183 [2022-04-06 22:28:45,805 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:28:45,806 INFO L499 BasicCegarLoop]: trace histogram [184, 183, 183, 62, 61, 61, 61, 61, 61, 61, 61, 61, 61, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:28:45,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-04-06 22:28:46,006 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:28:46,006 INFO L403 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:28:46,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:28:46,006 INFO L85 PathProgramCache]: Analyzing trace with hash -346629422, now seen corresponding path program 121 times [2022-04-06 22:28:46,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:28:46,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2104914041] [2022-04-06 22:28:46,007 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:28:46,007 INFO L85 PathProgramCache]: Analyzing trace with hash -346629422, now seen corresponding path program 122 times [2022-04-06 22:28:46,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:28:46,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945938300] [2022-04-06 22:28:46,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:28:46,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:28:46,023 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:28:46,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [556611310] [2022-04-06 22:28:46,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:28:46,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:28:46,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:28:46,024 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:28:46,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-04-06 22:28:46,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:28:46,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:28:46,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 2539 conjuncts, 127 conjunts are in the unsatisfiable core [2022-04-06 22:28:46,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:28:48,876 INFO L134 CoverageAnalysis]: Checked inductivity of 79914 backedges. 366 proven. 78812 refuted. 0 times theorem prover too weak. 736 trivial. 0 not checked. [2022-04-06 22:28:48,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:28:52,079 INFO L134 CoverageAnalysis]: Checked inductivity of 79914 backedges. 366 proven. 12932 refuted. 0 times theorem prover too weak. 66616 trivial. 0 not checked. [2022-04-06 22:28:52,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:28:52,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945938300] [2022-04-06 22:28:52,079 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:28:52,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556611310] [2022-04-06 22:28:52,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556611310] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:28:52,079 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:28:52,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 104 [2022-04-06 22:28:52,080 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:28:52,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2104914041] [2022-04-06 22:28:52,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2104914041] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:28:52,080 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:28:52,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-04-06 22:28:52,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400392356] [2022-04-06 22:28:52,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:28:52,081 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-04-06 22:28:52,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:28:52,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-04-06 22:28:52,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-04-06 22:28:52,083 INFO L87 Difference]: Start difference. First operand 7051 states and 8276 transitions. Second operand has 65 states, 65 states have (on average 6.753846153846154) internal successors, (439), 64 states have internal predecessors, (439), 64 states have call successors, (188), 64 states have call predecessors, (188), 62 states have return successors, (186), 62 states have call predecessors, (186), 63 states have call successors, (186) [2022-04-06 22:28:56,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:28:56,172 INFO L93 Difference]: Finished difference Result 7180 states and 8437 transitions. [2022-04-06 22:28:56,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-04-06 22:28:56,172 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 6.753846153846154) internal successors, (439), 64 states have internal predecessors, (439), 64 states have call successors, (188), 64 states have call predecessors, (188), 62 states have return successors, (186), 62 states have call predecessors, (186), 63 states have call successors, (186) Word has length 1182 [2022-04-06 22:28:56,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:28:56,184 INFO L225 Difference]: With dead ends: 7180 [2022-04-06 22:28:56,184 INFO L226 Difference]: Without dead ends: 7171 [2022-04-06 22:28:56,186 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 2424 GetRequests, 2260 SyntacticMatches, 1 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2028 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=11439, Invalid=15621, Unknown=0, NotChecked=0, Total=27060 [2022-04-06 22:28:56,187 INFO L913 BasicCegarLoop]: 215 mSDtfsCounter, 307 mSDsluCounter, 629 mSDsCounter, 0 mSdLazyCounter, 957 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 844 SdHoareTripleChecker+Invalid, 999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 957 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 22:28:56,187 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [307 Valid, 844 Invalid, 999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 957 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 22:28:56,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7171 states. [2022-04-06 22:28:58,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7171 to 7169. [2022-04-06 22:28:58,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7169 states, 4633 states have (on average 1.093459961148284) internal successors, (5066), 4809 states have internal predecessors, (5066), 1676 states have call successors, (1676), 860 states have call predecessors, (1676), 859 states have return successors, (1673), 1499 states have call predecessors, (1673), 1673 states have call successors, (1673) [2022-04-06 22:28:58,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7169 states to 7169 states and 8415 transitions. [2022-04-06 22:28:58,127 INFO L78 Accepts]: Start accepts. Automaton has 7169 states and 8415 transitions. Word has length 1182 [2022-04-06 22:28:58,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:28:58,127 INFO L478 AbstractCegarLoop]: Abstraction has 7169 states and 8415 transitions. [2022-04-06 22:28:58,128 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 6.753846153846154) internal successors, (439), 64 states have internal predecessors, (439), 64 states have call successors, (188), 64 states have call predecessors, (188), 62 states have return successors, (186), 62 states have call predecessors, (186), 63 states have call successors, (186) [2022-04-06 22:28:58,128 INFO L276 IsEmpty]: Start isEmpty. Operand 7169 states and 8415 transitions. [2022-04-06 22:28:58,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1202 [2022-04-06 22:28:58,143 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:28:58,143 INFO L499 BasicCegarLoop]: trace histogram [187, 186, 186, 63, 62, 62, 62, 62, 62, 62, 62, 62, 62, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:28:58,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-04-06 22:28:58,343 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:28:58,343 INFO L403 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:28:58,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:28:58,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1557235583, now seen corresponding path program 123 times [2022-04-06 22:28:58,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:28:58,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1701515300] [2022-04-06 22:28:58,344 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:28:58,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1557235583, now seen corresponding path program 124 times [2022-04-06 22:28:58,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:28:58,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624903362] [2022-04-06 22:28:58,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:28:58,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:28:58,361 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:28:58,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1974448876] [2022-04-06 22:28:58,361 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 22:28:58,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:28:58,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:28:58,362 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:28:58,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-04-06 22:28:58,762 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 22:28:58,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:28:58,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 2579 conjuncts, 129 conjunts are in the unsatisfiable core [2022-04-06 22:28:58,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:29:01,440 INFO L134 CoverageAnalysis]: Checked inductivity of 82557 backedges. 372 proven. 81437 refuted. 0 times theorem prover too weak. 748 trivial. 0 not checked. [2022-04-06 22:29:01,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:29:04,510 INFO L134 CoverageAnalysis]: Checked inductivity of 82557 backedges. 372 proven. 13361 refuted. 0 times theorem prover too weak. 68824 trivial. 0 not checked. [2022-04-06 22:29:04,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:29:04,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624903362] [2022-04-06 22:29:04,510 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:29:04,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974448876] [2022-04-06 22:29:04,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974448876] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:29:04,510 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:29:04,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 104 [2022-04-06 22:29:04,511 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:29:04,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1701515300] [2022-04-06 22:29:04,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1701515300] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:29:04,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:29:04,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-04-06 22:29:04,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10431206] [2022-04-06 22:29:04,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:29:04,512 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-04-06 22:29:04,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:29:04,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-04-06 22:29:04,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-04-06 22:29:04,514 INFO L87 Difference]: Start difference. First operand 7169 states and 8415 transitions. Second operand has 66 states, 66 states have (on average 6.757575757575758) internal successors, (446), 65 states have internal predecessors, (446), 65 states have call successors, (191), 65 states have call predecessors, (191), 63 states have return successors, (189), 63 states have call predecessors, (189), 64 states have call successors, (189) [2022-04-06 22:29:08,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:29:08,589 INFO L93 Difference]: Finished difference Result 7298 states and 8576 transitions. [2022-04-06 22:29:08,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-04-06 22:29:08,590 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 6.757575757575758) internal successors, (446), 65 states have internal predecessors, (446), 65 states have call successors, (191), 65 states have call predecessors, (191), 63 states have return successors, (189), 63 states have call predecessors, (189), 64 states have call successors, (189) Word has length 1201 [2022-04-06 22:29:08,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:29:08,602 INFO L225 Difference]: With dead ends: 7298 [2022-04-06 22:29:08,602 INFO L226 Difference]: Without dead ends: 7289 [2022-04-06 22:29:08,604 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 2463 GetRequests, 2298 SyntacticMatches, 1 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2089 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=11542, Invalid=15848, Unknown=0, NotChecked=0, Total=27390 [2022-04-06 22:29:08,604 INFO L913 BasicCegarLoop]: 218 mSDtfsCounter, 229 mSDsluCounter, 668 mSDsCounter, 0 mSdLazyCounter, 1016 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 886 SdHoareTripleChecker+Invalid, 1051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 22:29:08,604 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 886 Invalid, 1051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1016 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 22:29:08,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7289 states. [2022-04-06 22:29:10,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7289 to 7287. [2022-04-06 22:29:10,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7287 states, 4709 states have (on average 1.0934380972605648) internal successors, (5149), 4888 states have internal predecessors, (5149), 1704 states have call successors, (1704), 874 states have call predecessors, (1704), 873 states have return successors, (1701), 1524 states have call predecessors, (1701), 1701 states have call successors, (1701) [2022-04-06 22:29:10,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7287 states to 7287 states and 8554 transitions. [2022-04-06 22:29:10,594 INFO L78 Accepts]: Start accepts. Automaton has 7287 states and 8554 transitions. Word has length 1201 [2022-04-06 22:29:10,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:29:10,595 INFO L478 AbstractCegarLoop]: Abstraction has 7287 states and 8554 transitions. [2022-04-06 22:29:10,595 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 6.757575757575758) internal successors, (446), 65 states have internal predecessors, (446), 65 states have call successors, (191), 65 states have call predecessors, (191), 63 states have return successors, (189), 63 states have call predecessors, (189), 64 states have call successors, (189) [2022-04-06 22:29:10,595 INFO L276 IsEmpty]: Start isEmpty. Operand 7287 states and 8554 transitions. [2022-04-06 22:29:10,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1221 [2022-04-06 22:29:10,610 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:29:10,610 INFO L499 BasicCegarLoop]: trace histogram [190, 189, 189, 64, 63, 63, 63, 63, 63, 63, 63, 63, 63, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:29:10,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-04-06 22:29:10,811 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:29:10,811 INFO L403 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:29:10,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:29:10,811 INFO L85 PathProgramCache]: Analyzing trace with hash 772884082, now seen corresponding path program 125 times [2022-04-06 22:29:10,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:29:10,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1001600199] [2022-04-06 22:29:10,812 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:29:10,812 INFO L85 PathProgramCache]: Analyzing trace with hash 772884082, now seen corresponding path program 126 times [2022-04-06 22:29:10,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:29:10,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596357472] [2022-04-06 22:29:10,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:29:10,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:29:10,828 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:29:10,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [446796381] [2022-04-06 22:29:10,829 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 22:29:10,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:29:10,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:29:10,829 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:29:10,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-04-06 22:30:00,306 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 120 check-sat command(s) [2022-04-06 22:30:00,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:30:00,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 2619 conjuncts, 131 conjunts are in the unsatisfiable core [2022-04-06 22:30:00,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:30:03,034 INFO L134 CoverageAnalysis]: Checked inductivity of 85243 backedges. 378 proven. 84105 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2022-04-06 22:30:03,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:30:06,124 INFO L134 CoverageAnalysis]: Checked inductivity of 85243 backedges. 378 proven. 13797 refuted. 0 times theorem prover too weak. 71068 trivial. 0 not checked. [2022-04-06 22:30:06,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:30:06,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596357472] [2022-04-06 22:30:06,124 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:30:06,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446796381] [2022-04-06 22:30:06,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446796381] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:30:06,124 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:30:06,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 104 [2022-04-06 22:30:06,125 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:30:06,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1001600199] [2022-04-06 22:30:06,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1001600199] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:30:06,125 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:30:06,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-04-06 22:30:06,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609897011] [2022-04-06 22:30:06,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:30:06,126 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-04-06 22:30:06,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:30:06,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-04-06 22:30:06,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-04-06 22:30:06,129 INFO L87 Difference]: Start difference. First operand 7287 states and 8554 transitions. Second operand has 67 states, 67 states have (on average 6.7611940298507465) internal successors, (453), 66 states have internal predecessors, (453), 66 states have call successors, (194), 66 states have call predecessors, (194), 64 states have return successors, (192), 64 states have call predecessors, (192), 65 states have call successors, (192) [2022-04-06 22:30:10,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:30:10,387 INFO L93 Difference]: Finished difference Result 7416 states and 8715 transitions. [2022-04-06 22:30:10,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-04-06 22:30:10,388 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 6.7611940298507465) internal successors, (453), 66 states have internal predecessors, (453), 66 states have call successors, (194), 66 states have call predecessors, (194), 64 states have return successors, (192), 64 states have call predecessors, (192), 65 states have call successors, (192) Word has length 1220 [2022-04-06 22:30:10,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:30:10,400 INFO L225 Difference]: With dead ends: 7416 [2022-04-06 22:30:10,401 INFO L226 Difference]: Without dead ends: 7407 [2022-04-06 22:30:10,403 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 2502 GetRequests, 2336 SyntacticMatches, 1 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2151 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=11645, Invalid=16077, Unknown=0, NotChecked=0, Total=27722 [2022-04-06 22:30:10,403 INFO L913 BasicCegarLoop]: 221 mSDtfsCounter, 258 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 1048 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 868 SdHoareTripleChecker+Invalid, 1069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 22:30:10,403 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 868 Invalid, 1069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1048 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 22:30:10,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7407 states. [2022-04-06 22:30:12,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7407 to 7405. [2022-04-06 22:30:12,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7405 states, 4785 states have (on average 1.0934169278996866) internal successors, (5232), 4967 states have internal predecessors, (5232), 1732 states have call successors, (1732), 888 states have call predecessors, (1732), 887 states have return successors, (1729), 1549 states have call predecessors, (1729), 1729 states have call successors, (1729) [2022-04-06 22:30:12,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7405 states to 7405 states and 8693 transitions. [2022-04-06 22:30:12,458 INFO L78 Accepts]: Start accepts. Automaton has 7405 states and 8693 transitions. Word has length 1220 [2022-04-06 22:30:12,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:30:12,459 INFO L478 AbstractCegarLoop]: Abstraction has 7405 states and 8693 transitions. [2022-04-06 22:30:12,459 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 6.7611940298507465) internal successors, (453), 66 states have internal predecessors, (453), 66 states have call successors, (194), 66 states have call predecessors, (194), 64 states have return successors, (192), 64 states have call predecessors, (192), 65 states have call successors, (192) [2022-04-06 22:30:12,459 INFO L276 IsEmpty]: Start isEmpty. Operand 7405 states and 8693 transitions. [2022-04-06 22:30:12,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1240 [2022-04-06 22:30:12,474 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:30:12,475 INFO L499 BasicCegarLoop]: trace histogram [193, 192, 192, 65, 64, 64, 64, 64, 64, 64, 64, 64, 64, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:30:12,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-04-06 22:30:12,675 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:30:12,675 INFO L403 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:30:12,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:30:12,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1274292449, now seen corresponding path program 127 times [2022-04-06 22:30:12,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:30:12,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [246910571] [2022-04-06 22:30:12,676 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:30:12,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1274292449, now seen corresponding path program 128 times [2022-04-06 22:30:12,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:30:12,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385436042] [2022-04-06 22:30:12,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:30:12,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:30:12,693 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:30:12,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [195222539] [2022-04-06 22:30:12,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:30:12,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:30:12,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:30:12,694 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:30:12,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-04-06 22:30:12,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:30:12,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:30:12,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 2659 conjuncts, 133 conjunts are in the unsatisfiable core [2022-04-06 22:30:12,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:30:15,718 INFO L134 CoverageAnalysis]: Checked inductivity of 87972 backedges. 384 proven. 86816 refuted. 0 times theorem prover too weak. 772 trivial. 0 not checked. [2022-04-06 22:30:15,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:30:18,827 INFO L134 CoverageAnalysis]: Checked inductivity of 87972 backedges. 384 proven. 14240 refuted. 0 times theorem prover too weak. 73348 trivial. 0 not checked. [2022-04-06 22:30:18,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:30:18,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385436042] [2022-04-06 22:30:18,828 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:30:18,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195222539] [2022-04-06 22:30:18,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195222539] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:30:18,828 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:30:18,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 104 [2022-04-06 22:30:18,828 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:30:18,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [246910571] [2022-04-06 22:30:18,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [246910571] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:30:18,828 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:30:18,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-04-06 22:30:18,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875327164] [2022-04-06 22:30:18,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:30:18,829 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-04-06 22:30:18,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:30:18,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-04-06 22:30:18,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-04-06 22:30:18,831 INFO L87 Difference]: Start difference. First operand 7405 states and 8693 transitions. Second operand has 68 states, 68 states have (on average 6.764705882352941) internal successors, (460), 67 states have internal predecessors, (460), 67 states have call successors, (197), 67 states have call predecessors, (197), 65 states have return successors, (195), 65 states have call predecessors, (195), 66 states have call successors, (195) [2022-04-06 22:30:23,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:30:23,159 INFO L93 Difference]: Finished difference Result 7534 states and 8854 transitions. [2022-04-06 22:30:23,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-04-06 22:30:23,160 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 6.764705882352941) internal successors, (460), 67 states have internal predecessors, (460), 67 states have call successors, (197), 67 states have call predecessors, (197), 65 states have return successors, (195), 65 states have call predecessors, (195), 66 states have call successors, (195) Word has length 1239 [2022-04-06 22:30:23,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:30:23,172 INFO L225 Difference]: With dead ends: 7534 [2022-04-06 22:30:23,172 INFO L226 Difference]: Without dead ends: 7525 [2022-04-06 22:30:23,174 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 2541 GetRequests, 2374 SyntacticMatches, 1 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2214 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=11748, Invalid=16308, Unknown=0, NotChecked=0, Total=28056 [2022-04-06 22:30:23,174 INFO L913 BasicCegarLoop]: 224 mSDtfsCounter, 299 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 1071 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 880 SdHoareTripleChecker+Invalid, 1106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1071 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 22:30:23,174 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 880 Invalid, 1106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1071 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 22:30:23,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7525 states. [2022-04-06 22:30:25,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7525 to 7523. [2022-04-06 22:30:25,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7523 states, 4861 states have (on average 1.0933964204896112) internal successors, (5315), 5046 states have internal predecessors, (5315), 1760 states have call successors, (1760), 902 states have call predecessors, (1760), 901 states have return successors, (1757), 1574 states have call predecessors, (1757), 1757 states have call successors, (1757) [2022-04-06 22:30:25,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7523 states to 7523 states and 8832 transitions. [2022-04-06 22:30:25,216 INFO L78 Accepts]: Start accepts. Automaton has 7523 states and 8832 transitions. Word has length 1239 [2022-04-06 22:30:25,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:30:25,217 INFO L478 AbstractCegarLoop]: Abstraction has 7523 states and 8832 transitions. [2022-04-06 22:30:25,217 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 6.764705882352941) internal successors, (460), 67 states have internal predecessors, (460), 67 states have call successors, (197), 67 states have call predecessors, (197), 65 states have return successors, (195), 65 states have call predecessors, (195), 66 states have call successors, (195) [2022-04-06 22:30:25,217 INFO L276 IsEmpty]: Start isEmpty. Operand 7523 states and 8832 transitions. [2022-04-06 22:30:25,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1259 [2022-04-06 22:30:25,233 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:30:25,233 INFO L499 BasicCegarLoop]: trace histogram [196, 195, 195, 66, 65, 65, 65, 65, 65, 65, 65, 65, 65, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:30:25,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2022-04-06 22:30:25,433 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2022-04-06 22:30:25,434 INFO L403 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:30:25,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:30:25,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1656882670, now seen corresponding path program 129 times [2022-04-06 22:30:25,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:30:25,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [199340844] [2022-04-06 22:30:25,435 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:30:25,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1656882670, now seen corresponding path program 130 times [2022-04-06 22:30:25,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:30:25,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663390433] [2022-04-06 22:30:25,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:30:25,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:30:25,452 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:30:25,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1664026506] [2022-04-06 22:30:25,452 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 22:30:25,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:30:25,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:30:25,453 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:30:25,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-04-06 22:30:25,861 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 22:30:25,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:30:25,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 2699 conjuncts, 135 conjunts are in the unsatisfiable core [2022-04-06 22:30:25,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:30:28,768 INFO L134 CoverageAnalysis]: Checked inductivity of 90744 backedges. 390 proven. 89570 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2022-04-06 22:30:28,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:30:31,814 INFO L134 CoverageAnalysis]: Checked inductivity of 90744 backedges. 390 proven. 14690 refuted. 0 times theorem prover too weak. 75664 trivial. 0 not checked. [2022-04-06 22:30:31,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:30:31,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663390433] [2022-04-06 22:30:31,814 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:30:31,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664026506] [2022-04-06 22:30:31,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664026506] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:30:31,814 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:30:31,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 104 [2022-04-06 22:30:31,815 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:30:31,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [199340844] [2022-04-06 22:30:31,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [199340844] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:30:31,815 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:30:31,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-04-06 22:30:31,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501043837] [2022-04-06 22:30:31,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:30:31,816 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-04-06 22:30:31,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:30:31,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-04-06 22:30:31,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-04-06 22:30:31,818 INFO L87 Difference]: Start difference. First operand 7523 states and 8832 transitions. Second operand has 69 states, 69 states have (on average 6.768115942028985) internal successors, (467), 68 states have internal predecessors, (467), 68 states have call successors, (200), 68 states have call predecessors, (200), 66 states have return successors, (198), 66 states have call predecessors, (198), 67 states have call successors, (198) [2022-04-06 22:30:36,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:30:36,223 INFO L93 Difference]: Finished difference Result 7652 states and 8993 transitions. [2022-04-06 22:30:36,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2022-04-06 22:30:36,224 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 6.768115942028985) internal successors, (467), 68 states have internal predecessors, (467), 68 states have call successors, (200), 68 states have call predecessors, (200), 66 states have return successors, (198), 66 states have call predecessors, (198), 67 states have call successors, (198) Word has length 1258 [2022-04-06 22:30:36,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:30:36,236 INFO L225 Difference]: With dead ends: 7652 [2022-04-06 22:30:36,237 INFO L226 Difference]: Without dead ends: 7643 [2022-04-06 22:30:36,239 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 2580 GetRequests, 2412 SyntacticMatches, 1 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2278 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=11851, Invalid=16541, Unknown=0, NotChecked=0, Total=28392 [2022-04-06 22:30:36,239 INFO L913 BasicCegarLoop]: 227 mSDtfsCounter, 261 mSDsluCounter, 685 mSDsCounter, 0 mSdLazyCounter, 1256 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 912 SdHoareTripleChecker+Invalid, 1270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 22:30:36,239 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 912 Invalid, 1270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1256 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 22:30:36,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7643 states. [2022-04-06 22:30:38,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7643 to 7641. [2022-04-06 22:30:38,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7641 states, 4937 states have (on average 1.0933765444601986) internal successors, (5398), 5125 states have internal predecessors, (5398), 1788 states have call successors, (1788), 916 states have call predecessors, (1788), 915 states have return successors, (1785), 1599 states have call predecessors, (1785), 1785 states have call successors, (1785) [2022-04-06 22:30:38,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7641 states to 7641 states and 8971 transitions. [2022-04-06 22:30:38,432 INFO L78 Accepts]: Start accepts. Automaton has 7641 states and 8971 transitions. Word has length 1258 [2022-04-06 22:30:38,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:30:38,432 INFO L478 AbstractCegarLoop]: Abstraction has 7641 states and 8971 transitions. [2022-04-06 22:30:38,433 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 6.768115942028985) internal successors, (467), 68 states have internal predecessors, (467), 68 states have call successors, (200), 68 states have call predecessors, (200), 66 states have return successors, (198), 66 states have call predecessors, (198), 67 states have call successors, (198) [2022-04-06 22:30:38,433 INFO L276 IsEmpty]: Start isEmpty. Operand 7641 states and 8971 transitions. [2022-04-06 22:30:38,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1278 [2022-04-06 22:30:38,449 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:30:38,449 INFO L499 BasicCegarLoop]: trace histogram [199, 198, 198, 67, 66, 66, 66, 66, 66, 66, 66, 66, 66, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:30:38,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-04-06 22:30:38,649 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2022-04-06 22:30:38,649 INFO L403 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:30:38,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:30:38,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1129484609, now seen corresponding path program 131 times [2022-04-06 22:30:38,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:30:38,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1450106911] [2022-04-06 22:30:38,658 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:30:38,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1129484609, now seen corresponding path program 132 times [2022-04-06 22:30:38,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:30:38,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520656223] [2022-04-06 22:30:38,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:30:38,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:30:38,675 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:30:38,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1773687958] [2022-04-06 22:30:38,675 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 22:30:38,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:30:38,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:30:38,676 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:30:38,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-04-06 22:31:07,359 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 127 check-sat command(s) [2022-04-06 22:31:07,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:31:07,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 2730 conjuncts, 137 conjunts are in the unsatisfiable core [2022-04-06 22:31:07,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:31:10,251 INFO L134 CoverageAnalysis]: Checked inductivity of 93559 backedges. 396 proven. 92367 refuted. 0 times theorem prover too weak. 796 trivial. 0 not checked. [2022-04-06 22:31:10,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:31:13,366 INFO L134 CoverageAnalysis]: Checked inductivity of 93559 backedges. 396 proven. 15147 refuted. 0 times theorem prover too weak. 78016 trivial. 0 not checked. [2022-04-06 22:31:13,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:31:13,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520656223] [2022-04-06 22:31:13,367 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:31:13,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773687958] [2022-04-06 22:31:13,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773687958] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:31:13,367 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:31:13,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 104 [2022-04-06 22:31:13,367 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:31:13,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1450106911] [2022-04-06 22:31:13,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1450106911] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:31:13,367 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:31:13,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-04-06 22:31:13,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302287636] [2022-04-06 22:31:13,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:31:13,368 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-04-06 22:31:13,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:31:13,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-04-06 22:31:13,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-04-06 22:31:13,370 INFO L87 Difference]: Start difference. First operand 7641 states and 8971 transitions. Second operand has 70 states, 70 states have (on average 6.771428571428571) internal successors, (474), 69 states have internal predecessors, (474), 69 states have call successors, (203), 69 states have call predecessors, (203), 67 states have return successors, (201), 67 states have call predecessors, (201), 68 states have call successors, (201) [2022-04-06 22:31:17,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:31:17,806 INFO L93 Difference]: Finished difference Result 7770 states and 9132 transitions. [2022-04-06 22:31:17,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2022-04-06 22:31:17,807 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 6.771428571428571) internal successors, (474), 69 states have internal predecessors, (474), 69 states have call successors, (203), 69 states have call predecessors, (203), 67 states have return successors, (201), 67 states have call predecessors, (201), 68 states have call successors, (201) Word has length 1277 [2022-04-06 22:31:17,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:31:17,820 INFO L225 Difference]: With dead ends: 7770 [2022-04-06 22:31:17,820 INFO L226 Difference]: Without dead ends: 7761 [2022-04-06 22:31:17,822 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 2619 GetRequests, 2450 SyntacticMatches, 1 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2343 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=11954, Invalid=16776, Unknown=0, NotChecked=0, Total=28730 [2022-04-06 22:31:17,824 INFO L913 BasicCegarLoop]: 230 mSDtfsCounter, 304 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 1183 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 904 SdHoareTripleChecker+Invalid, 1239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 22:31:17,824 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [304 Valid, 904 Invalid, 1239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1183 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 22:31:17,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7761 states. [2022-04-06 22:31:19,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7761 to 7759. [2022-04-06 22:31:19,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7759 states, 5013 states have (on average 1.0933572710951527) internal successors, (5481), 5204 states have internal predecessors, (5481), 1816 states have call successors, (1816), 930 states have call predecessors, (1816), 929 states have return successors, (1813), 1624 states have call predecessors, (1813), 1813 states have call successors, (1813) [2022-04-06 22:31:19,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7759 states to 7759 states and 9110 transitions. [2022-04-06 22:31:19,937 INFO L78 Accepts]: Start accepts. Automaton has 7759 states and 9110 transitions. Word has length 1277 [2022-04-06 22:31:19,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:31:19,938 INFO L478 AbstractCegarLoop]: Abstraction has 7759 states and 9110 transitions. [2022-04-06 22:31:19,938 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 6.771428571428571) internal successors, (474), 69 states have internal predecessors, (474), 69 states have call successors, (203), 69 states have call predecessors, (203), 67 states have return successors, (201), 67 states have call predecessors, (201), 68 states have call successors, (201) [2022-04-06 22:31:19,938 INFO L276 IsEmpty]: Start isEmpty. Operand 7759 states and 9110 transitions. [2022-04-06 22:31:19,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1297 [2022-04-06 22:31:19,955 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:31:19,955 INFO L499 BasicCegarLoop]: trace histogram [202, 201, 201, 68, 67, 67, 67, 67, 67, 67, 67, 67, 67, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:31:19,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-04-06 22:31:20,155 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:31:20,156 INFO L403 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:31:20,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:31:20,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1729694286, now seen corresponding path program 133 times [2022-04-06 22:31:20,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:31:20,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1449913094] [2022-04-06 22:31:20,157 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:31:20,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1729694286, now seen corresponding path program 134 times [2022-04-06 22:31:20,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:31:20,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024820945] [2022-04-06 22:31:20,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:31:20,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:31:20,175 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:31:20,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [369105979] [2022-04-06 22:31:20,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:31:20,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:31:20,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:31:20,176 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:31:20,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-04-06 22:31:20,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:31:20,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:31:20,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 2779 conjuncts, 139 conjunts are in the unsatisfiable core [2022-04-06 22:31:20,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:31:23,442 INFO L134 CoverageAnalysis]: Checked inductivity of 96417 backedges. 402 proven. 95207 refuted. 0 times theorem prover too weak. 808 trivial. 0 not checked. [2022-04-06 22:31:23,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:31:26,421 INFO L134 CoverageAnalysis]: Checked inductivity of 96417 backedges. 402 proven. 15611 refuted. 0 times theorem prover too weak. 80404 trivial. 0 not checked. [2022-04-06 22:31:26,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:31:26,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024820945] [2022-04-06 22:31:26,421 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:31:26,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369105979] [2022-04-06 22:31:26,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369105979] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:31:26,421 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:31:26,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 104 [2022-04-06 22:31:26,422 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:31:26,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1449913094] [2022-04-06 22:31:26,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1449913094] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:31:26,422 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:31:26,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-04-06 22:31:26,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490417207] [2022-04-06 22:31:26,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:31:26,423 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-04-06 22:31:26,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:31:26,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-04-06 22:31:26,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-04-06 22:31:26,425 INFO L87 Difference]: Start difference. First operand 7759 states and 9110 transitions. Second operand has 71 states, 71 states have (on average 6.774647887323944) internal successors, (481), 70 states have internal predecessors, (481), 70 states have call successors, (206), 70 states have call predecessors, (206), 68 states have return successors, (204), 68 states have call predecessors, (204), 69 states have call successors, (204) [2022-04-06 22:31:31,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:31:31,007 INFO L93 Difference]: Finished difference Result 7888 states and 9271 transitions. [2022-04-06 22:31:31,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-04-06 22:31:31,008 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 6.774647887323944) internal successors, (481), 70 states have internal predecessors, (481), 70 states have call successors, (206), 70 states have call predecessors, (206), 68 states have return successors, (204), 68 states have call predecessors, (204), 69 states have call successors, (204) Word has length 1296 [2022-04-06 22:31:31,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:31:31,021 INFO L225 Difference]: With dead ends: 7888 [2022-04-06 22:31:31,021 INFO L226 Difference]: Without dead ends: 7879 [2022-04-06 22:31:31,023 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 2658 GetRequests, 2488 SyntacticMatches, 1 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2409 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=12057, Invalid=17013, Unknown=0, NotChecked=0, Total=29070 [2022-04-06 22:31:31,023 INFO L913 BasicCegarLoop]: 233 mSDtfsCounter, 229 mSDsluCounter, 733 mSDsCounter, 0 mSdLazyCounter, 1116 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 966 SdHoareTripleChecker+Invalid, 1151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 22:31:31,023 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 966 Invalid, 1151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1116 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 22:31:31,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7879 states. [2022-04-06 22:31:33,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7879 to 7877. [2022-04-06 22:31:33,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7877 states, 5089 states have (on average 1.093338573393594) internal successors, (5564), 5283 states have internal predecessors, (5564), 1844 states have call successors, (1844), 944 states have call predecessors, (1844), 943 states have return successors, (1841), 1649 states have call predecessors, (1841), 1841 states have call successors, (1841) [2022-04-06 22:31:33,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7877 states to 7877 states and 9249 transitions. [2022-04-06 22:31:33,177 INFO L78 Accepts]: Start accepts. Automaton has 7877 states and 9249 transitions. Word has length 1296 [2022-04-06 22:31:33,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:31:33,177 INFO L478 AbstractCegarLoop]: Abstraction has 7877 states and 9249 transitions. [2022-04-06 22:31:33,178 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 6.774647887323944) internal successors, (481), 70 states have internal predecessors, (481), 70 states have call successors, (206), 70 states have call predecessors, (206), 68 states have return successors, (204), 68 states have call predecessors, (204), 69 states have call successors, (204) [2022-04-06 22:31:33,178 INFO L276 IsEmpty]: Start isEmpty. Operand 7877 states and 9249 transitions. [2022-04-06 22:31:33,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1316 [2022-04-06 22:31:33,194 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:31:33,195 INFO L499 BasicCegarLoop]: trace histogram [205, 204, 204, 69, 68, 68, 68, 68, 68, 68, 68, 68, 68, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:31:33,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-04-06 22:31:33,396 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:31:33,396 INFO L403 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:31:33,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:31:33,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1996508767, now seen corresponding path program 135 times [2022-04-06 22:31:33,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:31:33,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1165067088] [2022-04-06 22:31:33,397 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:31:33,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1996508767, now seen corresponding path program 136 times [2022-04-06 22:31:33,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:31:33,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835890673] [2022-04-06 22:31:33,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:31:33,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:31:33,436 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:31:33,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [908327617] [2022-04-06 22:31:33,436 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 22:31:33,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:31:33,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:31:33,437 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:31:33,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-04-06 22:31:33,858 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 22:31:33,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:31:33,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 2819 conjuncts, 141 conjunts are in the unsatisfiable core [2022-04-06 22:31:33,883 INFO L286 TraceCheckSpWp]: Computing forward predicates...