/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 15:49:29,612 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 15:49:29,614 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 15:49:29,650 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 15:49:29,690 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 15:49:29,691 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 15:49:29,692 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 15:49:29,692 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-03-20 15:49:29,699 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 15:49:29,699 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 15:49:29,701 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 15:49:29,701 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 15:49:29,701 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 15:49:29,701 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 15:49:29,701 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 15:49:29,701 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 15:49:29,701 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 15:49:29,702 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 15:49:29,702 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 15:49:29,702 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 15:49:29,702 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 15:49:29,702 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 15:49:29,702 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 15:49:29,702 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 15:49:29,703 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 15:49:29,703 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 15:49:29,703 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 15:49:29,703 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 15:49:29,703 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 15:49:29,703 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 15:49:29,703 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 15:49:29,703 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 15:49:29,703 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-20 15:49:29,703 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 15:49:29,903 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 15:49:29,933 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 15:49:29,934 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 15:49:29,935 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 15:49:29,937 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 15:49:29,938 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound50.c [2022-03-20 15:49:29,985 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f12960c1/dc605ee91e9d415fb8481619a5f4daae/FLAGed021af08 [2022-03-20 15:49:30,269 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 15:49:30,269 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound50.c [2022-03-20 15:49:30,280 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f12960c1/dc605ee91e9d415fb8481619a5f4daae/FLAGed021af08 [2022-03-20 15:49:30,709 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f12960c1/dc605ee91e9d415fb8481619a5f4daae [2022-03-20 15:49:30,711 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 15:49:30,712 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 15:49:30,713 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 15:49:30,713 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 15:49:30,717 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 15:49:30,718 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 03:49:30" (1/1) ... [2022-03-20 15:49:30,719 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cc18bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:49:30, skipping insertion in model container [2022-03-20 15:49:30,719 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 03:49:30" (1/1) ... [2022-03-20 15:49:30,734 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 15:49:30,746 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 15:49:30,872 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/hard2_unwindbound50.c[526,539] [2022-03-20 15:49:30,915 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 15:49:30,923 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 15:49:30,935 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/hard2_unwindbound50.c[526,539] [2022-03-20 15:49:30,940 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 15:49:30,957 INFO L208 MainTranslator]: Completed translation [2022-03-20 15:49:30,958 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:49:30 WrapperNode [2022-03-20 15:49:30,958 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 15:49:30,959 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 15:49:30,959 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 15:49:30,960 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 15:49:30,970 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:49:30" (1/1) ... [2022-03-20 15:49:30,971 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:49:30" (1/1) ... [2022-03-20 15:49:30,977 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:49:30" (1/1) ... [2022-03-20 15:49:30,978 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:49:30" (1/1) ... [2022-03-20 15:49:30,983 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:49:30" (1/1) ... [2022-03-20 15:49:30,987 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:49:30" (1/1) ... [2022-03-20 15:49:30,989 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:49:30" (1/1) ... [2022-03-20 15:49:30,991 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 15:49:30,992 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 15:49:30,992 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 15:49:30,992 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 15:49:30,993 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:49:30" (1/1) ... [2022-03-20 15:49:30,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 15:49:31,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:49:31,018 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 15:49:31,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 15:49:31,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 15:49:31,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 15:49:31,070 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 15:49:31,070 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 15:49:31,070 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 15:49:31,070 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 15:49:31,070 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 15:49:31,070 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 15:49:31,071 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 15:49:31,071 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 15:49:31,071 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 15:49:31,072 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 15:49:31,073 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 15:49:31,073 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 15:49:31,073 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 15:49:31,073 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 15:49:31,073 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 15:49:31,073 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 15:49:31,073 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 15:49:31,073 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 15:49:31,129 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 15:49:31,130 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 15:49:31,286 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 15:49:31,290 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 15:49:31,290 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-20 15:49:31,291 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 03:49:31 BoogieIcfgContainer [2022-03-20 15:49:31,292 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 15:49:31,293 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 15:49:31,293 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 15:49:31,296 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 15:49:31,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 03:49:30" (1/3) ... [2022-03-20 15:49:31,296 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ec20b2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 03:49:31, skipping insertion in model container [2022-03-20 15:49:31,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:49:30" (2/3) ... [2022-03-20 15:49:31,297 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ec20b2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 03:49:31, skipping insertion in model container [2022-03-20 15:49:31,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 03:49:31" (3/3) ... [2022-03-20 15:49:31,298 INFO L111 eAbstractionObserver]: Analyzing ICFG hard2_unwindbound50.c [2022-03-20 15:49:31,301 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 15:49:31,301 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 15:49:31,350 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 15:49:31,356 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 15:49:31,356 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 15:49:31,366 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 15:49:31,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-20 15:49:31,372 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:49:31,372 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:49:31,373 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:49:31,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:49:31,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1682617676, now seen corresponding path program 1 times [2022-03-20 15:49:31,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:49:31,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [307536095] [2022-03-20 15:49:31,390 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:49:31,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1682617676, now seen corresponding path program 2 times [2022-03-20 15:49:31,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:49:31,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363732316] [2022-03-20 15:49:31,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:49:31,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:49:31,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 15:49:31,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 15:49:31,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 15:49:31,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 15:49:31,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:49:31,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363732316] [2022-03-20 15:49:31,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363732316] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:49:31,540 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:49:31,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 15:49:31,542 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:49:31,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [307536095] [2022-03-20 15:49:31,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [307536095] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:49:31,543 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:49:31,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 15:49:31,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281156744] [2022-03-20 15:49:31,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:49:31,548 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 15:49:31,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:49:31,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 15:49:31,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 15:49:31,572 INFO L87 Difference]: Start difference. First operand has 31 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 15:49:31,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:49:31,671 INFO L93 Difference]: Finished difference Result 57 states and 91 transitions. [2022-03-20 15:49:31,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 15:49:31,674 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-20 15:49:31,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:49:31,684 INFO L225 Difference]: With dead ends: 57 [2022-03-20 15:49:31,684 INFO L226 Difference]: Without dead ends: 27 [2022-03-20 15:49:31,687 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 15:49:31,691 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:49:31,693 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 44 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:49:31,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-20 15:49:31,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-03-20 15:49:31,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 9 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 15:49:31,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2022-03-20 15:49:31,728 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 12 [2022-03-20 15:49:31,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:49:31,729 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2022-03-20 15:49:31,729 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 15:49:31,729 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2022-03-20 15:49:31,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-20 15:49:31,729 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:49:31,729 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:49:31,730 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 15:49:31,730 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:49:31,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:49:31,730 INFO L85 PathProgramCache]: Analyzing trace with hash -2144676086, now seen corresponding path program 1 times [2022-03-20 15:49:31,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:49:31,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1461326269] [2022-03-20 15:49:31,734 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:49:31,734 INFO L85 PathProgramCache]: Analyzing trace with hash -2144676086, now seen corresponding path program 2 times [2022-03-20 15:49:31,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:49:31,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436684412] [2022-03-20 15:49:31,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:49:31,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:49:31,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 15:49:31,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 15:49:31,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 15:49:31,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 15:49:31,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:49:31,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436684412] [2022-03-20 15:49:31,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436684412] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:49:31,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:49:31,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 15:49:31,852 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:49:31,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1461326269] [2022-03-20 15:49:31,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1461326269] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:49:31,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:49:31,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 15:49:31,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978791235] [2022-03-20 15:49:31,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:49:31,854 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 15:49:31,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:49:31,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 15:49:31,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 15:49:31,854 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 15:49:32,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:49:32,007 INFO L93 Difference]: Finished difference Result 41 states and 56 transitions. [2022-03-20 15:49:32,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 15:49:32,007 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-20 15:49:32,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:49:32,010 INFO L225 Difference]: With dead ends: 41 [2022-03-20 15:49:32,012 INFO L226 Difference]: Without dead ends: 39 [2022-03-20 15:49:32,014 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-20 15:49:32,019 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 24 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:49:32,020 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 91 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:49:32,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-03-20 15:49:32,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2022-03-20 15:49:32,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 15:49:32,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2022-03-20 15:49:32,036 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 12 [2022-03-20 15:49:32,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:49:32,037 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2022-03-20 15:49:32,037 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 15:49:32,037 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2022-03-20 15:49:32,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-20 15:49:32,038 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:49:32,038 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:49:32,038 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 15:49:32,038 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:49:32,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:49:32,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1842794081, now seen corresponding path program 1 times [2022-03-20 15:49:32,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:49:32,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [176121385] [2022-03-20 15:49:32,043 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:49:32,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1842794081, now seen corresponding path program 2 times [2022-03-20 15:49:32,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:49:32,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431712467] [2022-03-20 15:49:32,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:49:32,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:49:32,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 15:49:32,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 15:49:32,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 15:49:32,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 15:49:32,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:49:32,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431712467] [2022-03-20 15:49:32,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431712467] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:49:32,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:49:32,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 15:49:32,119 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:49:32,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [176121385] [2022-03-20 15:49:32,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [176121385] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:49:32,120 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:49:32,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 15:49:32,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959492714] [2022-03-20 15:49:32,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:49:32,121 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 15:49:32,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:49:32,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 15:49:32,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 15:49:32,122 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 15:49:32,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:49:32,192 INFO L93 Difference]: Finished difference Result 46 states and 61 transitions. [2022-03-20 15:49:32,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 15:49:32,192 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-03-20 15:49:32,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:49:32,194 INFO L225 Difference]: With dead ends: 46 [2022-03-20 15:49:32,194 INFO L226 Difference]: Without dead ends: 32 [2022-03-20 15:49:32,195 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 15:49:32,196 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 6 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 15:49:32,196 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 73 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 15:49:32,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-20 15:49:32,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-20 15:49:32,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 15:49:32,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-03-20 15:49:32,202 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 14 [2022-03-20 15:49:32,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:49:32,202 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-03-20 15:49:32,202 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 15:49:32,202 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-03-20 15:49:32,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 15:49:32,203 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:49:32,203 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:49:32,203 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-20 15:49:32,203 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:49:32,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:49:32,204 INFO L85 PathProgramCache]: Analyzing trace with hash 311129497, now seen corresponding path program 1 times [2022-03-20 15:49:32,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:49:32,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1451831702] [2022-03-20 15:49:32,204 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:49:32,204 INFO L85 PathProgramCache]: Analyzing trace with hash 311129497, now seen corresponding path program 2 times [2022-03-20 15:49:32,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:49:32,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634741730] [2022-03-20 15:49:32,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:49:32,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:49:32,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 15:49:32,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 15:49:32,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 15:49:32,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-03-20 15:49:32,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 15:49:32,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 15:49:32,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:49:32,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634741730] [2022-03-20 15:49:32,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634741730] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:49:32,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:49:32,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 15:49:32,266 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:49:32,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1451831702] [2022-03-20 15:49:32,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1451831702] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:49:32,266 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:49:32,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 15:49:32,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667641011] [2022-03-20 15:49:32,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:49:32,266 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 15:49:32,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:49:32,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 15:49:32,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 15:49:32,267 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 15:49:32,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:49:32,357 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2022-03-20 15:49:32,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 15:49:32,358 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2022-03-20 15:49:32,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:49:32,358 INFO L225 Difference]: With dead ends: 46 [2022-03-20 15:49:32,358 INFO L226 Difference]: Without dead ends: 44 [2022-03-20 15:49:32,359 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-20 15:49:32,359 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 19 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:49:32,359 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 84 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:49:32,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-20 15:49:32,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 36. [2022-03-20 15:49:32,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 23 states have internal predecessors, (28), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 15:49:32,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2022-03-20 15:49:32,365 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 17 [2022-03-20 15:49:32,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:49:32,365 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2022-03-20 15:49:32,365 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 15:49:32,365 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2022-03-20 15:49:32,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 15:49:32,365 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:49:32,365 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:49:32,366 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-20 15:49:32,366 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:49:32,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:49:32,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1912623062, now seen corresponding path program 1 times [2022-03-20 15:49:32,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:49:32,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1094825936] [2022-03-20 15:49:32,367 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:49:32,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1912623062, now seen corresponding path program 2 times [2022-03-20 15:49:32,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:49:32,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541673430] [2022-03-20 15:49:32,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:49:32,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:49:32,374 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:49:32,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [138484494] [2022-03-20 15:49:32,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:49:32,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:49:32,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:49:32,376 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:49:32,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 15:49:32,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:49:32,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:49:32,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 15:49:32,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:49:32,559 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:49:32,559 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 15:49:32,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:49:32,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541673430] [2022-03-20 15:49:32,559 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:49:32,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138484494] [2022-03-20 15:49:32,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138484494] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:49:32,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:49:32,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 15:49:32,560 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:49:32,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1094825936] [2022-03-20 15:49:32,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1094825936] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:49:32,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:49:32,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 15:49:32,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393208664] [2022-03-20 15:49:32,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:49:32,561 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 15:49:32,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:49:32,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 15:49:32,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 15:49:32,561 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 15:49:32,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:49:32,609 INFO L93 Difference]: Finished difference Result 65 states and 87 transitions. [2022-03-20 15:49:32,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 15:49:32,610 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-03-20 15:49:32,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:49:32,610 INFO L225 Difference]: With dead ends: 65 [2022-03-20 15:49:32,611 INFO L226 Difference]: Without dead ends: 50 [2022-03-20 15:49:32,611 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 15:49:32,611 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 10 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 15:49:32,612 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 131 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 15:49:32,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-20 15:49:32,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-03-20 15:49:32,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 31 states have internal predecessors, (37), 15 states have call successors, (15), 6 states have call predecessors, (15), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 15:49:32,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2022-03-20 15:49:32,618 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 22 [2022-03-20 15:49:32,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:49:32,618 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2022-03-20 15:49:32,618 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 15:49:32,618 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2022-03-20 15:49:32,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-20 15:49:32,619 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:49:32,619 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:49:32,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 15:49:32,836 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:49:32,836 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:49:32,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:49:32,837 INFO L85 PathProgramCache]: Analyzing trace with hash 214651490, now seen corresponding path program 1 times [2022-03-20 15:49:32,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:49:32,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1927493638] [2022-03-20 15:49:32,837 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:49:32,837 INFO L85 PathProgramCache]: Analyzing trace with hash 214651490, now seen corresponding path program 2 times [2022-03-20 15:49:32,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:49:32,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130833588] [2022-03-20 15:49:32,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:49:32,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:49:32,844 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:49:32,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2119142267] [2022-03-20 15:49:32,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:49:32,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:49:32,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:49:32,846 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:49:32,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 15:49:32,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:49:32,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:49:32,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 15:49:32,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:49:32,954 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 15:49:32,954 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 15:49:32,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:49:32,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130833588] [2022-03-20 15:49:32,954 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:49:32,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119142267] [2022-03-20 15:49:32,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119142267] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:49:32,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:49:32,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 15:49:32,955 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:49:32,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1927493638] [2022-03-20 15:49:32,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1927493638] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:49:32,955 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:49:32,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 15:49:32,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940304572] [2022-03-20 15:49:32,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:49:32,955 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 15:49:32,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:49:32,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 15:49:32,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 15:49:32,956 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 15:49:32,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:49:32,992 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2022-03-20 15:49:32,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 15:49:32,992 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2022-03-20 15:49:32,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:49:32,993 INFO L225 Difference]: With dead ends: 70 [2022-03-20 15:49:32,993 INFO L226 Difference]: Without dead ends: 63 [2022-03-20 15:49:32,993 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 15:49:32,994 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 3 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 15:49:32,994 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 124 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 15:49:32,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-03-20 15:49:33,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2022-03-20 15:49:33,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 40 states have internal predecessors, (45), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 15:49:33,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2022-03-20 15:49:33,001 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 30 [2022-03-20 15:49:33,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:49:33,001 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2022-03-20 15:49:33,001 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 15:49:33,001 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2022-03-20 15:49:33,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-20 15:49:33,002 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:49:33,002 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:49:33,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 15:49:33,219 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,SelfDestructingSolverStorable5 [2022-03-20 15:49:33,220 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:49:33,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:49:33,220 INFO L85 PathProgramCache]: Analyzing trace with hash 216379368, now seen corresponding path program 1 times [2022-03-20 15:49:33,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:49:33,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1349104062] [2022-03-20 15:49:33,221 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:49:33,221 INFO L85 PathProgramCache]: Analyzing trace with hash 216379368, now seen corresponding path program 2 times [2022-03-20 15:49:33,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:49:33,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275031842] [2022-03-20 15:49:33,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:49:33,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:49:33,227 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:49:33,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [996771983] [2022-03-20 15:49:33,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:49:33,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:49:33,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:49:33,229 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:49:33,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 15:49:33,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:49:33,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:49:33,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 15:49:33,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:49:33,328 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 15:49:33,329 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 15:49:33,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:49:33,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275031842] [2022-03-20 15:49:33,329 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:49:33,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996771983] [2022-03-20 15:49:33,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996771983] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:49:33,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:49:33,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 15:49:33,330 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:49:33,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1349104062] [2022-03-20 15:49:33,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1349104062] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:49:33,330 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:49:33,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 15:49:33,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182209927] [2022-03-20 15:49:33,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:49:33,330 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 15:49:33,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:49:33,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 15:49:33,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 15:49:33,331 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (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) [2022-03-20 15:49:33,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:49:33,382 INFO L93 Difference]: Finished difference Result 76 states and 91 transitions. [2022-03-20 15:49:33,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 15:49:33,382 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (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 30 [2022-03-20 15:49:33,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:49:33,383 INFO L225 Difference]: With dead ends: 76 [2022-03-20 15:49:33,383 INFO L226 Difference]: Without dead ends: 64 [2022-03-20 15:49:33,383 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 15:49:33,384 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 11 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 15:49:33,384 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 103 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 15:49:33,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-03-20 15:49:33,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2022-03-20 15:49:33,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 39 states have (on average 1.2307692307692308) internal successors, (48), 41 states have internal predecessors, (48), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 15:49:33,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2022-03-20 15:49:33,392 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 30 [2022-03-20 15:49:33,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:49:33,392 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2022-03-20 15:49:33,392 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (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) [2022-03-20 15:49:33,392 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2022-03-20 15:49:33,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-20 15:49:33,393 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:49:33,393 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:49:33,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 15:49:33,608 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:49:33,609 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:49:33,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:49:33,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1255015940, now seen corresponding path program 1 times [2022-03-20 15:49:33,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:49:33,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1295153512] [2022-03-20 15:49:33,630 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 15:49:33,630 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-20 15:49:33,630 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 15:49:33,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1255015940, now seen corresponding path program 2 times [2022-03-20 15:49:33,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:49:33,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018459170] [2022-03-20 15:49:33,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:49:33,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:49:33,645 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:49:33,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1923896572] [2022-03-20 15:49:33,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:49:33,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:49:33,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:49:33,647 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:49:33,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 15:49:33,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:49:33,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:49:33,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 15:49:33,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:49:33,769 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-03-20 15:49:33,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:49:33,845 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 15:49:33,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:49:33,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018459170] [2022-03-20 15:49:33,846 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:49:33,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923896572] [2022-03-20 15:49:33,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923896572] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:49:33,846 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:49:33,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-03-20 15:49:33,847 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:49:33,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1295153512] [2022-03-20 15:49:33,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1295153512] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:49:33,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:49:33,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 15:49:33,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921709862] [2022-03-20 15:49:33,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:49:33,847 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 15:49:33,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:49:33,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 15:49:33,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-03-20 15:49:33,848 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-20 15:49:33,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:49:33,876 INFO L93 Difference]: Finished difference Result 90 states and 114 transitions. [2022-03-20 15:49:33,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 15:49:33,876 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), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 37 [2022-03-20 15:49:33,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:49:33,878 INFO L225 Difference]: With dead ends: 90 [2022-03-20 15:49:33,878 INFO L226 Difference]: Without dead ends: 65 [2022-03-20 15:49:33,878 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-03-20 15:49:33,879 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 2 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 15:49:33,879 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 126 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 15:49:33,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-03-20 15:49:33,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-03-20 15:49:33,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 43 states have internal predecessors, (50), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 15:49:33,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2022-03-20 15:49:33,894 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 37 [2022-03-20 15:49:33,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:49:33,894 INFO L478 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2022-03-20 15:49:33,895 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), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-20 15:49:33,895 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2022-03-20 15:49:33,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-20 15:49:33,895 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:49:33,895 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:49:33,951 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-03-20 15:49:34,096 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:49:34,096 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:49:34,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:49:34,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1057559728, now seen corresponding path program 1 times [2022-03-20 15:49:34,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:49:34,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [178450458] [2022-03-20 15:49:34,107 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 15:49:34,107 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-20 15:49:34,107 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 15:49:34,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1057559728, now seen corresponding path program 2 times [2022-03-20 15:49:34,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:49:34,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360565058] [2022-03-20 15:49:34,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:49:34,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:49:34,122 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:49:34,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [197893242] [2022-03-20 15:49:34,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:49:34,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:49:34,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:49:34,135 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:49:34,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 15:49:34,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:49:34,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:49:34,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 15:49:34,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:49:34,344 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-20 15:49:34,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:49:34,443 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-20 15:49:34,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:49:34,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360565058] [2022-03-20 15:49:34,444 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:49:34,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197893242] [2022-03-20 15:49:34,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197893242] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 15:49:34,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 15:49:34,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-03-20 15:49:34,444 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:49:34,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [178450458] [2022-03-20 15:49:34,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [178450458] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:49:34,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:49:34,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 15:49:34,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303459132] [2022-03-20 15:49:34,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:49:34,445 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 15:49:34,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:49:34,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 15:49:34,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-20 15:49:34,445 INFO L87 Difference]: Start difference. First operand 65 states and 78 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, (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) [2022-03-20 15:49:34,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:49:34,487 INFO L93 Difference]: Finished difference Result 78 states and 95 transitions. [2022-03-20 15:49:34,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 15:49:34,488 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, (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 40 [2022-03-20 15:49:34,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:49:34,505 INFO L225 Difference]: With dead ends: 78 [2022-03-20 15:49:34,505 INFO L226 Difference]: Without dead ends: 76 [2022-03-20 15:49:34,505 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-20 15:49:34,506 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 11 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 15:49:34,506 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 113 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 15:49:34,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-03-20 15:49:34,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2022-03-20 15:49:34,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 46 states have (on average 1.2173913043478262) internal successors, (56), 49 states have internal predecessors, (56), 17 states have call successors, (17), 10 states have call predecessors, (17), 9 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-20 15:49:34,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 88 transitions. [2022-03-20 15:49:34,524 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 88 transitions. Word has length 40 [2022-03-20 15:49:34,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:49:34,525 INFO L478 AbstractCegarLoop]: Abstraction has 73 states and 88 transitions. [2022-03-20 15:49:34,525 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, (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) [2022-03-20 15:49:34,525 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 88 transitions. [2022-03-20 15:49:34,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-20 15:49:34,526 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:49:34,526 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:49:34,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 15:49:34,739 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:49:34,739 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:49:34,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:49:34,740 INFO L85 PathProgramCache]: Analyzing trace with hash 529029787, now seen corresponding path program 1 times [2022-03-20 15:49:34,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:49:34,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1121855512] [2022-03-20 15:49:34,744 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 15:49:34,744 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-20 15:49:34,744 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 15:49:34,744 INFO L85 PathProgramCache]: Analyzing trace with hash 529029787, now seen corresponding path program 2 times [2022-03-20 15:49:34,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:49:34,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80220306] [2022-03-20 15:49:34,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:49:34,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:49:34,751 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:49:34,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [211591544] [2022-03-20 15:49:34,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:49:34,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:49:34,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:49:34,752 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:49:34,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 15:49:34,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:49:34,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:49:34,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 15:49:34,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:49:34,905 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 36 proven. 42 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-20 15:49:34,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:49:35,013 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-20 15:49:35,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:49:35,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80220306] [2022-03-20 15:49:35,013 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:49:35,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211591544] [2022-03-20 15:49:35,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211591544] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:49:35,013 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:49:35,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-03-20 15:49:35,014 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:49:35,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1121855512] [2022-03-20 15:49:35,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1121855512] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:49:35,014 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:49:35,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 15:49:35,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388215793] [2022-03-20 15:49:35,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:49:35,015 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 15:49:35,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:49:35,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 15:49:35,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-20 15:49:35,016 INFO L87 Difference]: Start difference. First operand 73 states and 88 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 5 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-03-20 15:49:35,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:49:35,048 INFO L93 Difference]: Finished difference Result 104 states and 120 transitions. [2022-03-20 15:49:35,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 15:49:35,049 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 5 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 53 [2022-03-20 15:49:35,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:49:35,051 INFO L225 Difference]: With dead ends: 104 [2022-03-20 15:49:35,051 INFO L226 Difference]: Without dead ends: 92 [2022-03-20 15:49:35,051 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-20 15:49:35,052 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 6 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 15:49:35,052 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 117 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 15:49:35,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-03-20 15:49:35,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2022-03-20 15:49:35,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 58 states have (on average 1.1896551724137931) internal successors, (69), 61 states have internal predecessors, (69), 20 states have call successors, (20), 13 states have call predecessors, (20), 12 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-20 15:49:35,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 107 transitions. [2022-03-20 15:49:35,067 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 107 transitions. Word has length 53 [2022-03-20 15:49:35,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:49:35,067 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 107 transitions. [2022-03-20 15:49:35,068 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 5 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-03-20 15:49:35,068 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 107 transitions. [2022-03-20 15:49:35,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-20 15:49:35,071 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:49:35,071 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:49:35,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 15:49:35,287 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:49:35,290 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:49:35,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:49:35,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1864650262, now seen corresponding path program 3 times [2022-03-20 15:49:35,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:49:35,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [475800869] [2022-03-20 15:49:35,298 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 15:49:35,298 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-20 15:49:35,298 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 15:49:35,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1864650262, now seen corresponding path program 4 times [2022-03-20 15:49:35,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:49:35,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088175523] [2022-03-20 15:49:35,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:49:35,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:49:35,315 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:49:35,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1772332354] [2022-03-20 15:49:35,315 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:49:35,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:49:35,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:49:35,319 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:49:35,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 15:49:35,355 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:49:35,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:49:35,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 15:49:35,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:49:35,452 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 36 proven. 46 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-20 15:49:35,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:49:35,565 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-20 15:49:35,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:49:35,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088175523] [2022-03-20 15:49:35,565 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:49:35,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772332354] [2022-03-20 15:49:35,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772332354] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:49:35,566 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:49:35,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-03-20 15:49:35,566 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:49:35,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [475800869] [2022-03-20 15:49:35,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [475800869] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:49:35,566 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:49:35,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 15:49:35,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039080766] [2022-03-20 15:49:35,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:49:35,566 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 15:49:35,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:49:35,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 15:49:35,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-20 15:49:35,567 INFO L87 Difference]: Start difference. First operand 91 states and 107 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-03-20 15:49:35,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:49:35,613 INFO L93 Difference]: Finished difference Result 126 states and 155 transitions. [2022-03-20 15:49:35,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 15:49:35,613 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 55 [2022-03-20 15:49:35,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:49:35,614 INFO L225 Difference]: With dead ends: 126 [2022-03-20 15:49:35,614 INFO L226 Difference]: Without dead ends: 93 [2022-03-20 15:49:35,615 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2022-03-20 15:49:35,615 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 3 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 15:49:35,615 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 134 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 15:49:35,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-03-20 15:49:35,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-03-20 15:49:35,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 63 states have internal predecessors, (71), 20 states have call successors, (20), 13 states have call predecessors, (20), 12 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-20 15:49:35,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 109 transitions. [2022-03-20 15:49:35,622 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 109 transitions. Word has length 55 [2022-03-20 15:49:35,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:49:35,622 INFO L478 AbstractCegarLoop]: Abstraction has 93 states and 109 transitions. [2022-03-20 15:49:35,622 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-03-20 15:49:35,623 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 109 transitions. [2022-03-20 15:49:35,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-03-20 15:49:35,623 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:49:35,623 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:49:35,640 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-20 15:49:35,840 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:49:35,841 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:49:35,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:49:35,841 INFO L85 PathProgramCache]: Analyzing trace with hash -43330764, now seen corresponding path program 1 times [2022-03-20 15:49:35,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:49:35,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1477842519] [2022-03-20 15:49:35,845 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 15:49:35,845 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-20 15:49:35,845 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 15:49:35,845 INFO L85 PathProgramCache]: Analyzing trace with hash -43330764, now seen corresponding path program 2 times [2022-03-20 15:49:35,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:49:35,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909878939] [2022-03-20 15:49:35,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:49:35,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:49:35,851 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:49:35,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2130719376] [2022-03-20 15:49:35,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:49:35,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:49:35,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:49:35,853 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:49:35,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 15:49:35,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:49:35,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:49:35,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 15:49:35,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:49:36,031 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 16 proven. 92 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 15:49:36,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:49:36,178 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-20 15:49:36,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:49:36,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909878939] [2022-03-20 15:49:36,179 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:49:36,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130719376] [2022-03-20 15:49:36,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130719376] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:49:36,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:49:36,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-03-20 15:49:36,179 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:49:36,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1477842519] [2022-03-20 15:49:36,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1477842519] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:49:36,179 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:49:36,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 15:49:36,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383582526] [2022-03-20 15:49:36,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:49:36,180 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 15:49:36,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:49:36,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 15:49:36,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-03-20 15:49:36,180 INFO L87 Difference]: Start difference. First operand 93 states and 109 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 6 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-03-20 15:49:36,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:49:36,246 INFO L93 Difference]: Finished difference Result 145 states and 168 transitions. [2022-03-20 15:49:36,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 15:49:36,247 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 6 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 62 [2022-03-20 15:49:36,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:49:36,248 INFO L225 Difference]: With dead ends: 145 [2022-03-20 15:49:36,248 INFO L226 Difference]: Without dead ends: 130 [2022-03-20 15:49:36,248 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2022-03-20 15:49:36,248 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 27 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 15:49:36,249 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 150 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 15:49:36,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-03-20 15:49:36,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 127. [2022-03-20 15:49:36,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 83 states have (on average 1.1686746987951808) internal successors, (97), 86 states have internal predecessors, (97), 27 states have call successors, (27), 18 states have call predecessors, (27), 16 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-20 15:49:36,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 148 transitions. [2022-03-20 15:49:36,258 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 148 transitions. Word has length 62 [2022-03-20 15:49:36,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:49:36,258 INFO L478 AbstractCegarLoop]: Abstraction has 127 states and 148 transitions. [2022-03-20 15:49:36,258 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 6 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-03-20 15:49:36,258 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 148 transitions. [2022-03-20 15:49:36,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-03-20 15:49:36,259 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:49:36,259 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:49:36,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 15:49:36,471 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,SelfDestructingSolverStorable11 [2022-03-20 15:49:36,472 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:49:36,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:49:36,472 INFO L85 PathProgramCache]: Analyzing trace with hash -41602886, now seen corresponding path program 1 times [2022-03-20 15:49:36,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:49:36,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [971852834] [2022-03-20 15:49:36,478 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 15:49:36,478 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-20 15:49:36,478 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 15:49:36,478 INFO L85 PathProgramCache]: Analyzing trace with hash -41602886, now seen corresponding path program 2 times [2022-03-20 15:49:36,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:49:36,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62418343] [2022-03-20 15:49:36,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:49:36,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:49:36,483 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:49:36,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1971757779] [2022-03-20 15:49:36,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:49:36,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:49:36,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:49:36,486 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:49:36,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 15:49:36,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:49:36,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:49:36,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-20 15:49:36,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:49:36,910 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-20 15:49:36,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:49:37,781 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-20 15:49:37,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:49:37,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62418343] [2022-03-20 15:49:37,782 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:49:37,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971757779] [2022-03-20 15:49:37,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971757779] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:49:37,782 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:49:37,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-03-20 15:49:37,782 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:49:37,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [971852834] [2022-03-20 15:49:37,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [971852834] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:49:37,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:49:37,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 15:49:37,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509387603] [2022-03-20 15:49:37,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:49:37,783 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 15:49:37,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:49:37,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 15:49:37,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-20 15:49:37,784 INFO L87 Difference]: Start difference. First operand 127 states and 148 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-20 15:49:37,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:49:37,910 INFO L93 Difference]: Finished difference Result 181 states and 219 transitions. [2022-03-20 15:49:37,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 15:49:37,910 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 62 [2022-03-20 15:49:37,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:49:37,912 INFO L225 Difference]: With dead ends: 181 [2022-03-20 15:49:37,912 INFO L226 Difference]: Without dead ends: 137 [2022-03-20 15:49:37,914 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 112 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-03-20 15:49:37,914 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 13 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:49:37,914 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 257 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:49:37,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-03-20 15:49:37,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 135. [2022-03-20 15:49:37,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 89 states have (on average 1.1685393258426966) internal successors, (104), 92 states have internal predecessors, (104), 27 states have call successors, (27), 19 states have call predecessors, (27), 18 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2022-03-20 15:49:37,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 156 transitions. [2022-03-20 15:49:37,925 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 156 transitions. Word has length 62 [2022-03-20 15:49:37,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:49:37,925 INFO L478 AbstractCegarLoop]: Abstraction has 135 states and 156 transitions. [2022-03-20 15:49:37,925 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-20 15:49:37,925 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 156 transitions. [2022-03-20 15:49:37,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-20 15:49:37,927 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:49:37,927 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:49:37,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 15:49:38,144 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-20 15:49:38,144 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:49:38,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:49:38,145 INFO L85 PathProgramCache]: Analyzing trace with hash -378736343, now seen corresponding path program 3 times [2022-03-20 15:49:38,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:49:38,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [969230202] [2022-03-20 15:49:38,148 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 15:49:38,148 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-20 15:49:38,148 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 15:49:38,148 INFO L85 PathProgramCache]: Analyzing trace with hash -378736343, now seen corresponding path program 4 times [2022-03-20 15:49:38,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:49:38,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718074897] [2022-03-20 15:49:38,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:49:38,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:49:38,153 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:49:38,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1952705264] [2022-03-20 15:49:38,154 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:49:38,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:49:38,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:49:38,155 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:49:38,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 15:49:38,195 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:49:38,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:49:38,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-20 15:49:38,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:49:38,611 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 48 proven. 34 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-03-20 15:49:38,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:49:38,678 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:49:38,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:49:38,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718074897] [2022-03-20 15:49:38,727 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:49:38,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952705264] [2022-03-20 15:49:38,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952705264] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 15:49:38,727 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 15:49:38,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-03-20 15:49:38,727 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:49:38,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [969230202] [2022-03-20 15:49:38,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [969230202] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:49:38,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:49:38,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 15:49:38,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296465689] [2022-03-20 15:49:38,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:49:38,728 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 15:49:38,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:49:38,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 15:49:38,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-03-20 15:49:38,728 INFO L87 Difference]: Start difference. First operand 135 states and 156 transitions. Second operand has 13 states, 12 states have (on average 2.0) internal successors, (24), 9 states have internal predecessors, (24), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 6 states have call successors, (10) [2022-03-20 15:49:38,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:49:38,954 INFO L93 Difference]: Finished difference Result 188 states and 232 transitions. [2022-03-20 15:49:38,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 15:49:38,954 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 9 states have internal predecessors, (24), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 6 states have call successors, (10) Word has length 67 [2022-03-20 15:49:38,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:49:38,955 INFO L225 Difference]: With dead ends: 188 [2022-03-20 15:49:38,955 INFO L226 Difference]: Without dead ends: 163 [2022-03-20 15:49:38,955 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-03-20 15:49:38,956 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 40 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 15:49:38,956 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 304 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 293 Invalid, 0 Unknown, 40 Unchecked, 0.2s Time] [2022-03-20 15:49:38,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-03-20 15:49:38,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 157. [2022-03-20 15:49:38,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 102 states have (on average 1.1862745098039216) internal successors, (121), 107 states have internal predecessors, (121), 34 states have call successors, (34), 21 states have call predecessors, (34), 20 states have return successors, (32), 28 states have call predecessors, (32), 32 states have call successors, (32) [2022-03-20 15:49:38,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 187 transitions. [2022-03-20 15:49:38,968 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 187 transitions. Word has length 67 [2022-03-20 15:49:38,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:49:38,968 INFO L478 AbstractCegarLoop]: Abstraction has 157 states and 187 transitions. [2022-03-20 15:49:38,969 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 9 states have internal predecessors, (24), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 6 states have call successors, (10) [2022-03-20 15:49:38,969 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 187 transitions. [2022-03-20 15:49:38,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-20 15:49:38,969 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:49:38,969 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:49:38,988 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 15:49:39,188 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,SelfDestructingSolverStorable13 [2022-03-20 15:49:39,188 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:49:39,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:49:39,189 INFO L85 PathProgramCache]: Analyzing trace with hash 73149133, now seen corresponding path program 1 times [2022-03-20 15:49:39,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:49:39,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [327626744] [2022-03-20 15:49:39,192 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 15:49:39,192 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-20 15:49:39,192 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 15:49:39,192 INFO L85 PathProgramCache]: Analyzing trace with hash 73149133, now seen corresponding path program 2 times [2022-03-20 15:49:39,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:49:39,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584330883] [2022-03-20 15:49:39,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:49:39,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:49:39,200 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:49:39,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1424765601] [2022-03-20 15:49:39,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:49:39,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:49:39,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:49:39,212 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:49:39,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 15:49:39,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:49:39,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:49:39,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-20 15:49:39,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:49:39,717 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 62 proven. 32 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-03-20 15:49:39,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:49:39,895 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 68 proven. 2 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2022-03-20 15:49:39,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:49:39,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584330883] [2022-03-20 15:49:39,895 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:49:39,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424765601] [2022-03-20 15:49:39,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424765601] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:49:39,896 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:49:39,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2022-03-20 15:49:39,896 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:49:39,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [327626744] [2022-03-20 15:49:39,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [327626744] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:49:39,896 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:49:39,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 15:49:39,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156823735] [2022-03-20 15:49:39,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:49:39,896 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 15:49:39,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:49:39,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 15:49:39,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-03-20 15:49:39,897 INFO L87 Difference]: Start difference. First operand 157 states and 187 transitions. Second operand has 12 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 6 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) [2022-03-20 15:49:40,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:49:40,040 INFO L93 Difference]: Finished difference Result 186 states and 221 transitions. [2022-03-20 15:49:40,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 15:49:40,041 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 6 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 73 [2022-03-20 15:49:40,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:49:40,042 INFO L225 Difference]: With dead ends: 186 [2022-03-20 15:49:40,042 INFO L226 Difference]: Without dead ends: 129 [2022-03-20 15:49:40,043 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 129 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-03-20 15:49:40,043 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 20 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:49:40,043 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 211 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:49:40,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-03-20 15:49:40,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2022-03-20 15:49:40,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 83 states have (on average 1.180722891566265) internal successors, (98), 87 states have internal predecessors, (98), 28 states have call successors, (28), 18 states have call predecessors, (28), 17 states have return successors, (26), 23 states have call predecessors, (26), 26 states have call successors, (26) [2022-03-20 15:49:40,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 152 transitions. [2022-03-20 15:49:40,068 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 152 transitions. Word has length 73 [2022-03-20 15:49:40,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:49:40,069 INFO L478 AbstractCegarLoop]: Abstraction has 129 states and 152 transitions. [2022-03-20 15:49:40,069 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 6 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) [2022-03-20 15:49:40,069 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 152 transitions. [2022-03-20 15:49:40,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-20 15:49:40,069 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:49:40,069 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:49:40,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-20 15:49:40,286 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,SelfDestructingSolverStorable14 [2022-03-20 15:49:40,287 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:49:40,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:49:40,287 INFO L85 PathProgramCache]: Analyzing trace with hash 469209008, now seen corresponding path program 5 times [2022-03-20 15:49:40,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:49:40,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [243382828] [2022-03-20 15:49:40,295 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 15:49:40,295 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-20 15:49:40,295 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 15:49:40,295 INFO L85 PathProgramCache]: Analyzing trace with hash 469209008, now seen corresponding path program 6 times [2022-03-20 15:49:40,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:49:40,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110777873] [2022-03-20 15:49:40,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:49:40,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:49:40,300 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:49:40,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [471819751] [2022-03-20 15:49:40,300 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:49:40,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:49:40,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:49:40,303 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:49:40,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 15:49:40,359 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-20 15:49:40,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:49:40,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 15:49:40,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:49:40,489 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 54 proven. 132 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-03-20 15:49:40,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:49:40,636 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 20 proven. 24 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-03-20 15:49:40,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:49:40,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110777873] [2022-03-20 15:49:40,637 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:49:40,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471819751] [2022-03-20 15:49:40,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471819751] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:49:40,637 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:49:40,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-03-20 15:49:40,638 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:49:40,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [243382828] [2022-03-20 15:49:40,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [243382828] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:49:40,638 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:49:40,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 15:49:40,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182815914] [2022-03-20 15:49:40,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:49:40,639 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 15:49:40,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:49:40,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 15:49:40,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-03-20 15:49:40,640 INFO L87 Difference]: Start difference. First operand 129 states and 152 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 6 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-03-20 15:49:40,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:49:40,695 INFO L93 Difference]: Finished difference Result 170 states and 207 transitions. [2022-03-20 15:49:40,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 15:49:40,696 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 6 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 73 [2022-03-20 15:49:40,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:49:40,697 INFO L225 Difference]: With dead ends: 170 [2022-03-20 15:49:40,697 INFO L226 Difference]: Without dead ends: 131 [2022-03-20 15:49:40,698 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2022-03-20 15:49:40,698 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 3 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 15:49:40,698 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 186 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 15:49:40,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-03-20 15:49:40,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2022-03-20 15:49:40,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 85 states have (on average 1.1764705882352942) internal successors, (100), 89 states have internal predecessors, (100), 28 states have call successors, (28), 18 states have call predecessors, (28), 17 states have return successors, (26), 23 states have call predecessors, (26), 26 states have call successors, (26) [2022-03-20 15:49:40,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 154 transitions. [2022-03-20 15:49:40,707 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 154 transitions. Word has length 73 [2022-03-20 15:49:40,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:49:40,708 INFO L478 AbstractCegarLoop]: Abstraction has 131 states and 154 transitions. [2022-03-20 15:49:40,708 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 6 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-03-20 15:49:40,708 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 154 transitions. [2022-03-20 15:49:40,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-20 15:49:40,708 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:49:40,708 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:49:40,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-20 15:49:40,926 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,SelfDestructingSolverStorable15 [2022-03-20 15:49:40,926 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:49:40,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:49:40,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1997631578, now seen corresponding path program 3 times [2022-03-20 15:49:40,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:49:40,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1080667561] [2022-03-20 15:49:40,930 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 15:49:40,930 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-20 15:49:40,930 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 15:49:40,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1997631578, now seen corresponding path program 4 times [2022-03-20 15:49:40,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:49:40,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323695916] [2022-03-20 15:49:40,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:49:40,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:49:40,936 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:49:40,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1903927779] [2022-03-20 15:49:40,937 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:49:40,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:49:40,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:49:40,948 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:49:40,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-20 15:49:41,016 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:49:41,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:49:41,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 15:49:41,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:49:41,177 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 22 proven. 200 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-20 15:49:41,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:49:41,367 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 22 proven. 20 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-03-20 15:49:41,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:49:41,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323695916] [2022-03-20 15:49:41,368 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:49:41,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903927779] [2022-03-20 15:49:41,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903927779] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:49:41,368 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:49:41,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-20 15:49:41,368 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:49:41,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1080667561] [2022-03-20 15:49:41,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1080667561] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:49:41,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:49:41,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 15:49:41,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163764786] [2022-03-20 15:49:41,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:49:41,369 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 15:49:41,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:49:41,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 15:49:41,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-20 15:49:41,370 INFO L87 Difference]: Start difference. First operand 131 states and 154 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 7 states have call successors, (14), 7 states have call predecessors, (14), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-03-20 15:49:41,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:49:41,445 INFO L93 Difference]: Finished difference Result 181 states and 209 transitions. [2022-03-20 15:49:41,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 15:49:41,446 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 7 states have call successors, (14), 7 states have call predecessors, (14), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 80 [2022-03-20 15:49:41,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:49:41,447 INFO L225 Difference]: With dead ends: 181 [2022-03-20 15:49:41,447 INFO L226 Difference]: Without dead ends: 166 [2022-03-20 15:49:41,448 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2022-03-20 15:49:41,448 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 29 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:49:41,448 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 171 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:49:41,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-03-20 15:49:41,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 163. [2022-03-20 15:49:41,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 106 states have (on average 1.1603773584905661) internal successors, (123), 110 states have internal predecessors, (123), 35 states have call successors, (35), 23 states have call predecessors, (35), 21 states have return successors, (32), 29 states have call predecessors, (32), 32 states have call successors, (32) [2022-03-20 15:49:41,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 190 transitions. [2022-03-20 15:49:41,477 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 190 transitions. Word has length 80 [2022-03-20 15:49:41,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:49:41,478 INFO L478 AbstractCegarLoop]: Abstraction has 163 states and 190 transitions. [2022-03-20 15:49:41,478 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 7 states have call successors, (14), 7 states have call predecessors, (14), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-03-20 15:49:41,478 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 190 transitions. [2022-03-20 15:49:41,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-20 15:49:41,479 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:49:41,479 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:49:41,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-20 15:49:41,680 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,SelfDestructingSolverStorable16 [2022-03-20 15:49:41,680 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:49:41,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:49:41,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1999359456, now seen corresponding path program 5 times [2022-03-20 15:49:41,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:49:41,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [296170820] [2022-03-20 15:49:41,683 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 15:49:41,683 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-20 15:49:41,683 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 15:49:41,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1999359456, now seen corresponding path program 6 times [2022-03-20 15:49:41,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:49:41,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639293148] [2022-03-20 15:49:41,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:49:41,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:49:41,688 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:49:41,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1575238645] [2022-03-20 15:49:41,688 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:49:41,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:49:41,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:49:41,694 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:49:41,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-20 15:49:41,734 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-20 15:49:41,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:49:41,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-20 15:49:41,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:49:42,036 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 57 proven. 10 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-03-20 15:49:42,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:50:05,115 WARN L232 SmtUtils]: Spent 10.69s on a formula simplification that was a NOOP. DAG size: 50 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 15:51:11,145 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 45 proven. 22 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-03-20 15:51:11,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:51:11,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639293148] [2022-03-20 15:51:11,146 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:51:11,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575238645] [2022-03-20 15:51:11,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575238645] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:51:11,146 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:51:11,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2022-03-20 15:51:11,146 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:51:11,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [296170820] [2022-03-20 15:51:11,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [296170820] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:51:11,146 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:51:11,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 15:51:11,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364975238] [2022-03-20 15:51:11,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:51:11,147 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 15:51:11,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:51:11,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 15:51:11,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2022-03-20 15:51:11,147 INFO L87 Difference]: Start difference. First operand 163 states and 190 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-03-20 15:51:13,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:51:13,290 INFO L93 Difference]: Finished difference Result 193 states and 224 transitions. [2022-03-20 15:51:13,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 15:51:13,290 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 80 [2022-03-20 15:51:13,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:51:13,291 INFO L225 Difference]: With dead ends: 193 [2022-03-20 15:51:13,291 INFO L226 Difference]: Without dead ends: 173 [2022-03-20 15:51:13,292 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 144 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=70, Invalid=235, Unknown=1, NotChecked=0, Total=306 [2022-03-20 15:51:13,292 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 48 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:51:13,292 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 150 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:51:13,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-03-20 15:51:13,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 169. [2022-03-20 15:51:13,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 111 states have (on average 1.1531531531531531) internal successors, (128), 115 states have internal predecessors, (128), 35 states have call successors, (35), 23 states have call predecessors, (35), 22 states have return successors, (33), 30 states have call predecessors, (33), 33 states have call successors, (33) [2022-03-20 15:51:13,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 196 transitions. [2022-03-20 15:51:13,303 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 196 transitions. Word has length 80 [2022-03-20 15:51:13,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:51:13,303 INFO L478 AbstractCegarLoop]: Abstraction has 169 states and 196 transitions. [2022-03-20 15:51:13,304 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-03-20 15:51:13,304 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 196 transitions. [2022-03-20 15:51:13,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-20 15:51:13,304 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:51:13,304 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:51:13,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-20 15:51:13,519 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:51:13,519 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:51:13,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:51:13,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1035991527, now seen corresponding path program 3 times [2022-03-20 15:51:13,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:51:13,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2138504814] [2022-03-20 15:51:13,523 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 15:51:13,523 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-20 15:51:13,523 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 15:51:13,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1035991527, now seen corresponding path program 4 times [2022-03-20 15:51:13,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:51:13,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965580824] [2022-03-20 15:51:13,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:51:13,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:51:13,531 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:51:13,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [576508929] [2022-03-20 15:51:13,532 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:51:13,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:51:13,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:51:13,533 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:51:13,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-20 15:51:13,585 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:51:13,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:51:13,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-20 15:51:13,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:51:13,805 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 44 proven. 5 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-03-20 15:51:13,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:51:13,976 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 38 proven. 11 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-03-20 15:51:13,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:51:13,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965580824] [2022-03-20 15:51:13,976 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:51:13,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576508929] [2022-03-20 15:51:13,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576508929] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:51:13,976 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:51:13,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-03-20 15:51:13,977 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:51:13,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2138504814] [2022-03-20 15:51:13,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2138504814] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:51:13,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:51:13,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 15:51:13,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292903833] [2022-03-20 15:51:13,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:51:13,977 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 15:51:13,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:51:13,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 15:51:13,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-03-20 15:51:13,978 INFO L87 Difference]: Start difference. First operand 169 states and 196 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-03-20 15:51:14,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:51:14,010 INFO L93 Difference]: Finished difference Result 197 states and 235 transitions. [2022-03-20 15:51:14,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 15:51:14,010 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 91 [2022-03-20 15:51:14,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:51:14,011 INFO L225 Difference]: With dead ends: 197 [2022-03-20 15:51:14,011 INFO L226 Difference]: Without dead ends: 184 [2022-03-20 15:51:14,012 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 175 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-03-20 15:51:14,012 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 7 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 15:51:14,012 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 103 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 15:51:14,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-03-20 15:51:14,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 180. [2022-03-20 15:51:14,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 118 states have (on average 1.1694915254237288) internal successors, (138), 122 states have internal predecessors, (138), 39 states have call successors, (39), 23 states have call predecessors, (39), 22 states have return successors, (37), 34 states have call predecessors, (37), 37 states have call successors, (37) [2022-03-20 15:51:14,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 214 transitions. [2022-03-20 15:51:14,026 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 214 transitions. Word has length 91 [2022-03-20 15:51:14,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:51:14,026 INFO L478 AbstractCegarLoop]: Abstraction has 180 states and 214 transitions. [2022-03-20 15:51:14,026 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-03-20 15:51:14,026 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 214 transitions. [2022-03-20 15:51:14,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-20 15:51:14,027 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:51:14,027 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:51:14,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-20 15:51:14,239 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:51:14,240 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:51:14,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:51:14,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1432051402, now seen corresponding path program 7 times [2022-03-20 15:51:14,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:51:14,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1474799781] [2022-03-20 15:51:14,243 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 15:51:14,243 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-20 15:51:14,243 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 15:51:14,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1432051402, now seen corresponding path program 8 times [2022-03-20 15:51:14,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:51:14,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144608132] [2022-03-20 15:51:14,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:51:14,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:51:14,250 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:51:14,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1665432771] [2022-03-20 15:51:14,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:51:14,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:51:14,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:51:14,251 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:51:14,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-20 15:51:14,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:51:14,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:51:14,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 15:51:14,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:51:14,474 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 72 proven. 260 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-03-20 15:51:14,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:51:14,677 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 26 proven. 44 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-03-20 15:51:14,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:51:14,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144608132] [2022-03-20 15:51:14,677 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:51:14,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665432771] [2022-03-20 15:51:14,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665432771] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:51:14,677 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:51:14,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-20 15:51:14,677 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:51:14,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1474799781] [2022-03-20 15:51:14,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1474799781] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:51:14,678 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:51:14,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 15:51:14,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063113906] [2022-03-20 15:51:14,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:51:14,678 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 15:51:14,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:51:14,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 15:51:14,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-20 15:51:14,678 INFO L87 Difference]: Start difference. First operand 180 states and 214 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 7 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-03-20 15:51:14,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:51:14,752 INFO L93 Difference]: Finished difference Result 242 states and 300 transitions. [2022-03-20 15:51:14,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 15:51:14,753 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 7 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 91 [2022-03-20 15:51:14,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:51:14,753 INFO L225 Difference]: With dead ends: 242 [2022-03-20 15:51:14,753 INFO L226 Difference]: Without dead ends: 182 [2022-03-20 15:51:14,754 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=183, Unknown=0, NotChecked=0, Total=306 [2022-03-20 15:51:14,754 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 11 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 15:51:14,754 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 176 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 15:51:14,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-03-20 15:51:14,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2022-03-20 15:51:14,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 120 states have (on average 1.1666666666666667) internal successors, (140), 124 states have internal predecessors, (140), 39 states have call successors, (39), 23 states have call predecessors, (39), 22 states have return successors, (37), 34 states have call predecessors, (37), 37 states have call successors, (37) [2022-03-20 15:51:14,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 216 transitions. [2022-03-20 15:51:14,766 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 216 transitions. Word has length 91 [2022-03-20 15:51:14,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:51:14,766 INFO L478 AbstractCegarLoop]: Abstraction has 182 states and 216 transitions. [2022-03-20 15:51:14,766 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 7 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-03-20 15:51:14,766 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 216 transitions. [2022-03-20 15:51:14,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-03-20 15:51:14,767 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:51:14,767 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:51:14,784 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-03-20 15:51:14,982 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:51:14,983 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:51:14,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:51:14,983 INFO L85 PathProgramCache]: Analyzing trace with hash -614243194, now seen corresponding path program 5 times [2022-03-20 15:51:14,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:51:14,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1667590824] [2022-03-20 15:51:14,987 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 15:51:14,987 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-20 15:51:14,987 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 15:51:14,987 INFO L85 PathProgramCache]: Analyzing trace with hash -614243194, now seen corresponding path program 6 times [2022-03-20 15:51:14,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:51:14,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252406218] [2022-03-20 15:51:14,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:51:14,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:51:14,996 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:51:14,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [437918918] [2022-03-20 15:51:14,996 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:51:14,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:51:14,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:51:14,997 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:51:14,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-20 15:51:15,068 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 15:51:15,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:51:15,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 15:51:15,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:51:15,244 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 26 proven. 296 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-03-20 15:51:15,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:51:15,467 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 26 proven. 28 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-03-20 15:51:15,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:51:15,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252406218] [2022-03-20 15:51:15,468 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:51:15,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437918918] [2022-03-20 15:51:15,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437918918] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:51:15,468 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:51:15,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-03-20 15:51:15,468 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:51:15,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1667590824] [2022-03-20 15:51:15,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1667590824] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:51:15,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:51:15,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 15:51:15,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487091556] [2022-03-20 15:51:15,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:51:15,469 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 15:51:15,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:51:15,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 15:51:15,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-03-20 15:51:15,469 INFO L87 Difference]: Start difference. First operand 182 states and 216 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 8 states have call successors, (16), 8 states have call predecessors, (16), 6 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-03-20 15:51:15,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:51:15,574 INFO L93 Difference]: Finished difference Result 240 states and 281 transitions. [2022-03-20 15:51:15,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 15:51:15,575 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 8 states have call successors, (16), 8 states have call predecessors, (16), 6 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 94 [2022-03-20 15:51:15,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:51:15,576 INFO L225 Difference]: With dead ends: 240 [2022-03-20 15:51:15,576 INFO L226 Difference]: Without dead ends: 227 [2022-03-20 15:51:15,576 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=186, Unknown=0, NotChecked=0, Total=306 [2022-03-20 15:51:15,577 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 41 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:51:15,577 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 199 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:51:15,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-03-20 15:51:15,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 226. [2022-03-20 15:51:15,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 151 states have (on average 1.1456953642384107) internal successors, (173), 155 states have internal predecessors, (173), 46 states have call successors, (46), 29 states have call predecessors, (46), 28 states have return successors, (44), 41 states have call predecessors, (44), 44 states have call successors, (44) [2022-03-20 15:51:15,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 263 transitions. [2022-03-20 15:51:15,592 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 263 transitions. Word has length 94 [2022-03-20 15:51:15,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:51:15,592 INFO L478 AbstractCegarLoop]: Abstraction has 226 states and 263 transitions. [2022-03-20 15:51:15,592 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 8 states have call successors, (16), 8 states have call predecessors, (16), 6 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-03-20 15:51:15,592 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 263 transitions. [2022-03-20 15:51:15,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-03-20 15:51:15,593 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:51:15,593 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:51:15,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-20 15:51:15,811 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:51:15,811 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:51:15,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:51:15,812 INFO L85 PathProgramCache]: Analyzing trace with hash -612515316, now seen corresponding path program 7 times [2022-03-20 15:51:15,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:51:15,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [595596658] [2022-03-20 15:51:15,815 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 15:51:15,815 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-20 15:51:15,815 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 15:51:15,815 INFO L85 PathProgramCache]: Analyzing trace with hash -612515316, now seen corresponding path program 8 times [2022-03-20 15:51:15,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:51:15,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84740813] [2022-03-20 15:51:15,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:51:15,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:51:15,825 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:51:15,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [903049367] [2022-03-20 15:51:15,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:51:15,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:51:15,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:51:15,841 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:51:15,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-20 15:51:15,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:51:15,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:51:15,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-20 15:51:15,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:51:16,438 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 26 proven. 30 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-03-20 15:51:16,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:51:33,305 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 26 proven. 30 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-03-20 15:51:33,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:51:33,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84740813] [2022-03-20 15:51:33,305 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:51:33,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903049367] [2022-03-20 15:51:33,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903049367] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:51:33,306 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:51:33,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-03-20 15:51:33,306 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:51:33,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [595596658] [2022-03-20 15:51:33,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [595596658] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:51:33,306 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:51:33,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 15:51:33,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210592245] [2022-03-20 15:51:33,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:51:33,306 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 15:51:33,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:51:33,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 15:51:33,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-03-20 15:51:33,307 INFO L87 Difference]: Start difference. First operand 226 states and 263 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 6 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) [2022-03-20 15:51:33,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:51:33,478 INFO L93 Difference]: Finished difference Result 275 states and 329 transitions. [2022-03-20 15:51:33,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 15:51:33,479 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 6 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 94 [2022-03-20 15:51:33,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:51:33,480 INFO L225 Difference]: With dead ends: 275 [2022-03-20 15:51:33,480 INFO L226 Difference]: Without dead ends: 240 [2022-03-20 15:51:33,480 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 170 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-03-20 15:51:33,481 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 13 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:51:33,481 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 455 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:51:33,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-03-20 15:51:33,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 238. [2022-03-20 15:51:33,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 159 states have (on average 1.150943396226415) internal successors, (183), 163 states have internal predecessors, (183), 48 states have call successors, (48), 31 states have call predecessors, (48), 30 states have return successors, (46), 43 states have call predecessors, (46), 46 states have call successors, (46) [2022-03-20 15:51:33,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 277 transitions. [2022-03-20 15:51:33,496 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 277 transitions. Word has length 94 [2022-03-20 15:51:33,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:51:33,496 INFO L478 AbstractCegarLoop]: Abstraction has 238 states and 277 transitions. [2022-03-20 15:51:33,496 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 6 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) [2022-03-20 15:51:33,496 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 277 transitions. [2022-03-20 15:51:33,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-20 15:51:33,497 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:51:33,497 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:51:33,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-20 15:51:33,697 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:51:33,697 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:51:33,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:51:33,698 INFO L85 PathProgramCache]: Analyzing trace with hash 18113303, now seen corresponding path program 9 times [2022-03-20 15:51:33,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:51:33,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [844458170] [2022-03-20 15:51:33,700 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 15:51:33,700 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-20 15:51:33,700 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 15:51:33,700 INFO L85 PathProgramCache]: Analyzing trace with hash 18113303, now seen corresponding path program 10 times [2022-03-20 15:51:33,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:51:33,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319353201] [2022-03-20 15:51:33,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:51:33,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:51:33,705 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:51:33,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [132830584] [2022-03-20 15:51:33,705 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:51:33,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:51:33,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:51:33,706 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:51:33,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-20 15:51:33,758 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:51:33,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:51:33,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-20 15:51:33,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:51:38,852 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:52:46,869 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 100 proven. 53 refuted. 6 times theorem prover too weak. 265 trivial. 0 not checked. [2022-03-20 15:52:46,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:53:31,225 WARN L232 SmtUtils]: Spent 9.17s on a formula simplification that was a NOOP. DAG size: 89 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 15:53:34,041 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse8 (div c_main_~p~0 2))) (let ((.cse10 (* c_main_~B~0 .cse8))) (or (let ((.cse9 (div .cse8 2)) (.cse3 (< .cse8 0))) (let ((.cse0 (< .cse10 0)) (.cse7 (= (mod .cse10 2) 0)) (.cse4 (not .cse3)) (.cse5 (* (+ .cse9 1) c_main_~B~0)) (.cse6 (div .cse10 2)) (.cse2 (* c_main_~B~0 .cse9))) (and (or (not .cse0) (let ((.cse1 (+ .cse6 1))) (and (or (= .cse1 .cse2) .cse3) (or .cse4 (= .cse1 .cse5)))) .cse7) (or (and .cse0 (not .cse7)) (and (or .cse4 (= (mod .cse8 2) 0) (= .cse6 .cse5)) (or .cse3 (= .cse6 .cse2))))))) (not (= (* c_main_~p~0 c_main_~B~0) c_main_~d~0)) (not (= .cse10 (div c_main_~d~0 2)))))) is different from true [2022-03-20 15:54:04,391 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 101 proven. 23 refuted. 0 times theorem prover too weak. 292 trivial. 8 not checked. [2022-03-20 15:54:04,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:54:04,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319353201] [2022-03-20 15:54:04,392 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:54:04,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132830584] [2022-03-20 15:54:04,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132830584] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:54:04,392 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:54:04,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2022-03-20 15:54:04,392 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:54:04,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [844458170] [2022-03-20 15:54:04,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [844458170] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:54:04,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:54:04,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 15:54:04,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697493781] [2022-03-20 15:54:04,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:54:04,393 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 15:54:04,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:54:04,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 15:54:04,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=259, Unknown=14, NotChecked=34, Total=380 [2022-03-20 15:54:04,394 INFO L87 Difference]: Start difference. First operand 238 states and 277 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 11 states have internal predecessors, (31), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) [2022-03-20 15:54:07,206 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 15:54:20,674 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 15:54:22,709 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 15:54:24,063 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 15:54:26,115 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 15:54:27,634 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 15:54:29,102 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 15:54:32,799 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 15:54:34,815 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 15:54:35,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:54:35,738 INFO L93 Difference]: Finished difference Result 269 states and 325 transitions. [2022-03-20 15:54:35,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 15:54:35,739 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 11 states have internal predecessors, (31), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) Word has length 99 [2022-03-20 15:54:35,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:54:35,740 INFO L225 Difference]: With dead ends: 269 [2022-03-20 15:54:35,741 INFO L226 Difference]: Without dead ends: 267 [2022-03-20 15:54:35,741 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 178 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 69.5s TimeCoverageRelationStatistics Valid=96, Invalid=354, Unknown=16, NotChecked=40, Total=506 [2022-03-20 15:54:35,741 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 41 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 22 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 154 IncrementalHoareTripleChecker+Unchecked, 20.7s IncrementalHoareTripleChecker+Time [2022-03-20 15:54:35,741 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 444 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 277 Invalid, 4 Unknown, 154 Unchecked, 20.7s Time] [2022-03-20 15:54:35,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-03-20 15:54:35,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 254. [2022-03-20 15:54:35,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 168 states have (on average 1.1607142857142858) internal successors, (195), 174 states have internal predecessors, (195), 54 states have call successors, (54), 32 states have call predecessors, (54), 31 states have return successors, (52), 47 states have call predecessors, (52), 52 states have call successors, (52) [2022-03-20 15:54:35,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 301 transitions. [2022-03-20 15:54:35,795 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 301 transitions. Word has length 99 [2022-03-20 15:54:35,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:54:35,795 INFO L478 AbstractCegarLoop]: Abstraction has 254 states and 301 transitions. [2022-03-20 15:54:35,795 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 11 states have internal predecessors, (31), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) [2022-03-20 15:54:35,795 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 301 transitions. [2022-03-20 15:54:35,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-03-20 15:54:35,809 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:54:35,809 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:54:35,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-20 15:54:36,010 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:54:36,010 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:54:36,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:54:36,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1358295611, now seen corresponding path program 5 times [2022-03-20 15:54:36,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:54:36,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1263872342] [2022-03-20 15:54:36,013 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 15:54:36,013 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-20 15:54:36,014 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 15:54:36,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1358295611, now seen corresponding path program 6 times [2022-03-20 15:54:36,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:54:36,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126222722] [2022-03-20 15:54:36,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:54:36,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:54:36,018 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:54:36,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2092023359] [2022-03-20 15:54:36,019 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:54:36,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:54:36,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:54:36,023 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:54:36,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-20 15:54:36,071 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 15:54:36,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:54:36,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 15:54:36,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:54:36,237 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 108 proven. 4 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2022-03-20 15:54:36,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:54:36,425 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 110 proven. 2 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2022-03-20 15:54:36,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:54:36,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126222722] [2022-03-20 15:54:36,425 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:54:36,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092023359] [2022-03-20 15:54:36,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092023359] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:54:36,425 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:54:36,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2022-03-20 15:54:36,425 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:54:36,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1263872342] [2022-03-20 15:54:36,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1263872342] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:54:36,425 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:54:36,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 15:54:36,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488575654] [2022-03-20 15:54:36,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:54:36,426 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 15:54:36,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:54:36,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 15:54:36,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-03-20 15:54:36,426 INFO L87 Difference]: Start difference. First operand 254 states and 301 transitions. Second operand has 10 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-20 15:54:36,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:54:36,563 INFO L93 Difference]: Finished difference Result 271 states and 317 transitions. [2022-03-20 15:54:36,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 15:54:36,572 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 105 [2022-03-20 15:54:36,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:54:36,573 INFO L225 Difference]: With dead ends: 271 [2022-03-20 15:54:36,573 INFO L226 Difference]: Without dead ends: 266 [2022-03-20 15:54:36,573 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 196 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-03-20 15:54:36,574 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 37 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:54:36,575 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 137 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:54:36,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-03-20 15:54:36,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 249. [2022-03-20 15:54:36,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 166 states have (on average 1.1204819277108433) internal successors, (186), 172 states have internal predecessors, (186), 49 states have call successors, (49), 34 states have call predecessors, (49), 33 states have return successors, (47), 42 states have call predecessors, (47), 47 states have call successors, (47) [2022-03-20 15:54:36,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 282 transitions. [2022-03-20 15:54:36,605 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 282 transitions. Word has length 105 [2022-03-20 15:54:36,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:54:36,605 INFO L478 AbstractCegarLoop]: Abstraction has 249 states and 282 transitions. [2022-03-20 15:54:36,605 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-20 15:54:36,605 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 282 transitions. [2022-03-20 15:54:36,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-03-20 15:54:36,606 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:54:36,606 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:54:36,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-20 15:54:36,823 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,SelfDestructingSolverStorable23 [2022-03-20 15:54:36,823 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:54:36,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:54:36,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1894816690, now seen corresponding path program 7 times [2022-03-20 15:54:36,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:54:36,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [294919227] [2022-03-20 15:54:36,826 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 15:54:36,826 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-20 15:54:36,826 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 15:54:36,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1894816690, now seen corresponding path program 8 times [2022-03-20 15:54:36,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:54:36,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798078623] [2022-03-20 15:54:36,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:54:36,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:54:36,838 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:54:36,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1535973853] [2022-03-20 15:54:36,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:54:36,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:54:36,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:54:36,841 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:54:36,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-20 15:54:36,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:54:36,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:54:36,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 15:54:36,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:54:37,084 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 30 proven. 414 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-20 15:54:37,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:54:37,297 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 30 proven. 42 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-03-20 15:54:37,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:54:37,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798078623] [2022-03-20 15:54:37,297 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:54:37,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535973853] [2022-03-20 15:54:37,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535973853] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:54:37,297 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:54:37,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-03-20 15:54:37,298 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:54:37,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [294919227] [2022-03-20 15:54:37,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [294919227] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:54:37,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:54:37,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 15:54:37,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868486577] [2022-03-20 15:54:37,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:54:37,298 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 15:54:37,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:54:37,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 15:54:37,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-03-20 15:54:37,299 INFO L87 Difference]: Start difference. First operand 249 states and 282 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 9 states have call successors, (18), 9 states have call predecessors, (18), 7 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-03-20 15:54:37,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:54:37,428 INFO L93 Difference]: Finished difference Result 325 states and 368 transitions. [2022-03-20 15:54:37,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 15:54:37,429 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 9 states have call successors, (18), 9 states have call predecessors, (18), 7 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 108 [2022-03-20 15:54:37,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:54:37,430 INFO L225 Difference]: With dead ends: 325 [2022-03-20 15:54:37,430 INFO L226 Difference]: Without dead ends: 312 [2022-03-20 15:54:37,430 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=167, Invalid=253, Unknown=0, NotChecked=0, Total=420 [2022-03-20 15:54:37,431 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 47 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:54:37,431 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 222 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:54:37,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-03-20 15:54:37,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 311. [2022-03-20 15:54:37,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 213 states have (on average 1.1126760563380282) internal successors, (237), 218 states have internal predecessors, (237), 56 states have call successors, (56), 42 states have call predecessors, (56), 41 states have return successors, (54), 50 states have call predecessors, (54), 54 states have call successors, (54) [2022-03-20 15:54:37,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 347 transitions. [2022-03-20 15:54:37,471 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 347 transitions. Word has length 108 [2022-03-20 15:54:37,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:54:37,471 INFO L478 AbstractCegarLoop]: Abstraction has 311 states and 347 transitions. [2022-03-20 15:54:37,471 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 9 states have call successors, (18), 9 states have call predecessors, (18), 7 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-03-20 15:54:37,471 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 347 transitions. [2022-03-20 15:54:37,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-03-20 15:54:37,472 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:54:37,472 INFO L499 BasicCegarLoop]: trace histogram [18, 17, 17, 6, 5, 5, 5, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:54:37,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-20 15:54:37,689 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,SelfDestructingSolverStorable24 [2022-03-20 15:54:37,689 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:54:37,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:54:37,689 INFO L85 PathProgramCache]: Analyzing trace with hash 522560651, now seen corresponding path program 1 times [2022-03-20 15:54:37,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:54:37,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [472087508] [2022-03-20 15:54:37,692 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 15:54:37,692 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-20 15:54:37,692 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 15:54:37,692 INFO L85 PathProgramCache]: Analyzing trace with hash 522560651, now seen corresponding path program 2 times [2022-03-20 15:54:37,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:54:37,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985965257] [2022-03-20 15:54:37,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:54:37,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:54:37,697 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:54:37,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [487364096] [2022-03-20 15:54:37,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:54:37,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:54:37,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:54:37,699 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:54:37,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-20 15:54:37,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:54:37,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:54:37,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 15:54:37,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:54:37,901 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 150 proven. 430 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-03-20 15:54:37,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:54:38,079 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 34 proven. 70 refuted. 0 times theorem prover too weak. 546 trivial. 0 not checked. [2022-03-20 15:54:38,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:54:38,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985965257] [2022-03-20 15:54:38,080 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:54:38,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487364096] [2022-03-20 15:54:38,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487364096] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:54:38,080 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:54:38,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-03-20 15:54:38,080 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:54:38,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [472087508] [2022-03-20 15:54:38,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [472087508] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:54:38,080 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:54:38,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 15:54:38,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080305230] [2022-03-20 15:54:38,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:54:38,081 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 15:54:38,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:54:38,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 15:54:38,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-03-20 15:54:38,082 INFO L87 Difference]: Start difference. First operand 311 states and 347 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 8 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2022-03-20 15:54:38,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:54:38,194 INFO L93 Difference]: Finished difference Result 364 states and 409 transitions. [2022-03-20 15:54:38,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 15:54:38,194 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 8 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) Word has length 118 [2022-03-20 15:54:38,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:54:38,196 INFO L225 Difference]: With dead ends: 364 [2022-03-20 15:54:38,196 INFO L226 Difference]: Without dead ends: 309 [2022-03-20 15:54:38,196 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 [2022-03-20 15:54:38,197 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 22 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:54:38,197 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 188 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:54:38,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2022-03-20 15:54:38,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 309. [2022-03-20 15:54:38,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 211 states have (on average 1.1090047393364928) internal successors, (234), 216 states have internal predecessors, (234), 56 states have call successors, (56), 42 states have call predecessors, (56), 41 states have return successors, (54), 50 states have call predecessors, (54), 54 states have call successors, (54) [2022-03-20 15:54:38,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 344 transitions. [2022-03-20 15:54:38,273 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 344 transitions. Word has length 118 [2022-03-20 15:54:38,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:54:38,274 INFO L478 AbstractCegarLoop]: Abstraction has 309 states and 344 transitions. [2022-03-20 15:54:38,274 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 8 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2022-03-20 15:54:38,274 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 344 transitions. [2022-03-20 15:54:38,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-03-20 15:54:38,275 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:54:38,275 INFO L499 BasicCegarLoop]: trace histogram [18, 17, 17, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:54:38,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-20 15:54:38,475 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-20 15:54:38,475 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:54:38,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:54:38,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1632097758, now seen corresponding path program 9 times [2022-03-20 15:54:38,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:54:38,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2034029943] [2022-03-20 15:54:38,478 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 15:54:38,478 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-20 15:54:38,478 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 15:54:38,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1632097758, now seen corresponding path program 10 times [2022-03-20 15:54:38,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:54:38,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598095105] [2022-03-20 15:54:38,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:54:38,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:54:38,483 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:54:38,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1017580398] [2022-03-20 15:54:38,483 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:54:38,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:54:38,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:54:38,485 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:54:38,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-20 15:54:38,630 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:54:38,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:54:38,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-20 15:54:38,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:54:38,763 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 34 proven. 554 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-20 15:54:38,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:54:38,924 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 34 proven. 62 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-03-20 15:54:38,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:54:38,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598095105] [2022-03-20 15:54:38,924 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:54:38,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017580398] [2022-03-20 15:54:38,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017580398] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:54:38,927 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:54:38,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-03-20 15:54:38,927 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:54:38,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2034029943] [2022-03-20 15:54:38,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2034029943] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:54:38,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:54:38,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 15:54:38,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058899976] [2022-03-20 15:54:38,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:54:38,929 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 15:54:38,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:54:38,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 15:54:38,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-03-20 15:54:38,931 INFO L87 Difference]: Start difference. First operand 309 states and 344 transitions. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 10 states have call successors, (20), 10 states have call predecessors, (20), 8 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2022-03-20 15:54:39,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:54:39,131 INFO L93 Difference]: Finished difference Result 403 states and 458 transitions. [2022-03-20 15:54:39,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 15:54:39,132 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 10 states have call successors, (20), 10 states have call predecessors, (20), 8 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) Word has length 122 [2022-03-20 15:54:39,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:54:39,134 INFO L225 Difference]: With dead ends: 403 [2022-03-20 15:54:39,134 INFO L226 Difference]: Without dead ends: 390 [2022-03-20 15:54:39,134 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=222, Invalid=330, Unknown=0, NotChecked=0, Total=552 [2022-03-20 15:54:39,134 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 65 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:54:39,136 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 221 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:54:39,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-03-20 15:54:39,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 389. [2022-03-20 15:54:39,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 267 states have (on average 1.1086142322097379) internal successors, (296), 273 states have internal predecessors, (296), 71 states have call successors, (71), 51 states have call predecessors, (71), 50 states have return successors, (69), 64 states have call predecessors, (69), 69 states have call successors, (69) [2022-03-20 15:54:39,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 436 transitions. [2022-03-20 15:54:39,176 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 436 transitions. Word has length 122 [2022-03-20 15:54:39,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:54:39,176 INFO L478 AbstractCegarLoop]: Abstraction has 389 states and 436 transitions. [2022-03-20 15:54:39,176 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 10 states have call successors, (20), 10 states have call predecessors, (20), 8 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2022-03-20 15:54:39,177 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 436 transitions. [2022-03-20 15:54:39,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-03-20 15:54:39,177 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:54:39,178 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 7, 6, 6, 6, 6, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:54:39,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-20 15:54:39,387 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:54:39,387 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:54:39,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:54:39,388 INFO L85 PathProgramCache]: Analyzing trace with hash -867526735, now seen corresponding path program 3 times [2022-03-20 15:54:39,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:54:39,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1523253886] [2022-03-20 15:54:39,390 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 15:54:39,390 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-20 15:54:39,390 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 15:54:39,390 INFO L85 PathProgramCache]: Analyzing trace with hash -867526735, now seen corresponding path program 4 times [2022-03-20 15:54:39,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:54:39,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745635888] [2022-03-20 15:54:39,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:54:39,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:54:39,395 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:54:39,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [670834173] [2022-03-20 15:54:39,396 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:54:39,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:54:39,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:54:39,397 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:54:39,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-20 15:54:39,468 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:54:39,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:54:39,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 15:54:39,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:54:39,686 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 180 proven. 642 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-03-20 15:54:39,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:54:39,935 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 40 proven. 102 refuted. 0 times theorem prover too weak. 762 trivial. 0 not checked. [2022-03-20 15:54:39,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:54:39,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745635888] [2022-03-20 15:54:39,936 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:54:39,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670834173] [2022-03-20 15:54:39,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670834173] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:54:39,936 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:54:39,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-03-20 15:54:39,936 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:54:39,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1523253886] [2022-03-20 15:54:39,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1523253886] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:54:39,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:54:39,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 15:54:39,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300060788] [2022-03-20 15:54:39,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:54:39,937 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 15:54:39,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:54:39,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 15:54:39,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-03-20 15:54:39,937 INFO L87 Difference]: Start difference. First operand 389 states and 436 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 9 states have call successors, (23), 9 states have call predecessors, (23), 8 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-03-20 15:54:40,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:54:40,066 INFO L93 Difference]: Finished difference Result 442 states and 498 transitions. [2022-03-20 15:54:40,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 15:54:40,067 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 9 states have call successors, (23), 9 states have call predecessors, (23), 8 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) Word has length 136 [2022-03-20 15:54:40,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:54:40,073 INFO L225 Difference]: With dead ends: 442 [2022-03-20 15:54:40,074 INFO L226 Difference]: Without dead ends: 387 [2022-03-20 15:54:40,074 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=227, Invalid=325, Unknown=0, NotChecked=0, Total=552 [2022-03-20 15:54:40,074 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 37 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 15:54:40,075 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 190 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 15:54:40,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-03-20 15:54:40,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 387. [2022-03-20 15:54:40,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 265 states have (on average 1.1056603773584905) internal successors, (293), 271 states have internal predecessors, (293), 71 states have call successors, (71), 51 states have call predecessors, (71), 50 states have return successors, (69), 64 states have call predecessors, (69), 69 states have call successors, (69) [2022-03-20 15:54:40,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 433 transitions. [2022-03-20 15:54:40,140 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 433 transitions. Word has length 136 [2022-03-20 15:54:40,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:54:40,140 INFO L478 AbstractCegarLoop]: Abstraction has 387 states and 433 transitions. [2022-03-20 15:54:40,140 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 9 states have call successors, (23), 9 states have call predecessors, (23), 8 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-03-20 15:54:40,140 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 433 transitions. [2022-03-20 15:54:40,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-03-20 15:54:40,141 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:54:40,141 INFO L499 BasicCegarLoop]: trace histogram [20, 19, 19, 6, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:54:40,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-20 15:54:40,357 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,SelfDestructingSolverStorable27 [2022-03-20 15:54:40,358 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:54:40,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:54:40,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1792552182, now seen corresponding path program 11 times [2022-03-20 15:54:40,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:54:40,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1107369029] [2022-03-20 15:54:40,361 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 15:54:40,361 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-20 15:54:40,361 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 15:54:40,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1792552182, now seen corresponding path program 12 times [2022-03-20 15:54:40,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:54:40,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231129517] [2022-03-20 15:54:40,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:54:40,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:54:40,372 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:54:40,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [859311721] [2022-03-20 15:54:40,372 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:54:40,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:54:40,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:54:40,373 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:54:40,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-20 15:54:40,460 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-03-20 15:54:40,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:54:40,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-20 15:54:40,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:54:40,602 INFO L134 CoverageAnalysis]: Checked inductivity of 810 backedges. 38 proven. 716 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-03-20 15:54:40,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:54:40,775 INFO L134 CoverageAnalysis]: Checked inductivity of 810 backedges. 38 proven. 88 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2022-03-20 15:54:40,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:54:40,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231129517] [2022-03-20 15:54:40,776 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:54:40,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859311721] [2022-03-20 15:54:40,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859311721] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:54:40,776 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:54:40,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2022-03-20 15:54:40,776 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:54:40,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1107369029] [2022-03-20 15:54:40,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1107369029] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:54:40,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:54:40,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 15:54:40,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138236394] [2022-03-20 15:54:40,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:54:40,776 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 15:54:40,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:54:40,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 15:54:40,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-03-20 15:54:40,777 INFO L87 Difference]: Start difference. First operand 387 states and 433 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 11 states have call successors, (22), 11 states have call predecessors, (22), 9 states have return successors, (20), 9 states have call predecessors, (20), 9 states have call successors, (20) [2022-03-20 15:54:40,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:54:40,975 INFO L93 Difference]: Finished difference Result 483 states and 551 transitions. [2022-03-20 15:54:40,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 15:54:40,976 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 11 states have call successors, (22), 11 states have call predecessors, (22), 9 states have return successors, (20), 9 states have call predecessors, (20), 9 states have call successors, (20) Word has length 136 [2022-03-20 15:54:40,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:54:40,978 INFO L225 Difference]: With dead ends: 483 [2022-03-20 15:54:40,978 INFO L226 Difference]: Without dead ends: 470 [2022-03-20 15:54:40,978 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=285, Invalid=417, Unknown=0, NotChecked=0, Total=702 [2022-03-20 15:54:40,978 INFO L913 BasicCegarLoop]: 66 mSDtfsCounter, 73 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:54:40,978 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 275 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:54:40,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2022-03-20 15:54:41,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 469. [2022-03-20 15:54:41,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 321 states have (on average 1.1059190031152648) internal successors, (355), 329 states have internal predecessors, (355), 88 states have call successors, (88), 60 states have call predecessors, (88), 59 states have return successors, (86), 79 states have call predecessors, (86), 86 states have call successors, (86) [2022-03-20 15:54:41,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 529 transitions. [2022-03-20 15:54:41,031 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 529 transitions. Word has length 136 [2022-03-20 15:54:41,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:54:41,031 INFO L478 AbstractCegarLoop]: Abstraction has 469 states and 529 transitions. [2022-03-20 15:54:41,031 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 11 states have call successors, (22), 11 states have call predecessors, (22), 9 states have return successors, (20), 9 states have call predecessors, (20), 9 states have call successors, (20) [2022-03-20 15:54:41,031 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 529 transitions. [2022-03-20 15:54:41,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-03-20 15:54:41,032 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:54:41,033 INFO L499 BasicCegarLoop]: trace histogram [22, 21, 21, 7, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:54:41,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-20 15:54:41,250 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,SelfDestructingSolverStorable28 [2022-03-20 15:54:41,250 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:54:41,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:54:41,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1618957110, now seen corresponding path program 13 times [2022-03-20 15:54:41,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:54:41,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [769657325] [2022-03-20 15:54:41,253 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 15:54:41,253 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-20 15:54:41,253 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 15:54:41,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1618957110, now seen corresponding path program 14 times [2022-03-20 15:54:41,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:54:41,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347515260] [2022-03-20 15:54:41,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:54:41,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:54:41,259 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:54:41,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1078542214] [2022-03-20 15:54:41,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:54:41,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:54:41,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:54:41,262 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:54:41,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-20 15:54:41,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:54:41,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:54:41,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-20 15:54:41,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:54:41,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1002 backedges. 42 proven. 900 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-20 15:54:41,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:54:41,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1002 backedges. 42 proven. 120 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2022-03-20 15:54:41,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:54:41,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347515260] [2022-03-20 15:54:41,802 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:54:41,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078542214] [2022-03-20 15:54:41,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078542214] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:54:41,802 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:54:41,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-03-20 15:54:41,802 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:54:41,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [769657325] [2022-03-20 15:54:41,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [769657325] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:54:41,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:54:41,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 15:54:41,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378866597] [2022-03-20 15:54:41,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:54:41,803 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 15:54:41,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:54:41,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 15:54:41,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-20 15:54:41,803 INFO L87 Difference]: Start difference. First operand 469 states and 529 transitions. Second operand has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 12 states have internal predecessors, (68), 12 states have call successors, (24), 12 states have call predecessors, (24), 10 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) [2022-03-20 15:54:42,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:54:42,011 INFO L93 Difference]: Finished difference Result 571 states and 657 transitions. [2022-03-20 15:54:42,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 15:54:42,013 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 12 states have internal predecessors, (68), 12 states have call successors, (24), 12 states have call predecessors, (24), 10 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) Word has length 150 [2022-03-20 15:54:42,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:54:42,015 INFO L225 Difference]: With dead ends: 571 [2022-03-20 15:54:42,016 INFO L226 Difference]: Without dead ends: 558 [2022-03-20 15:54:42,016 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 277 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=356, Invalid=514, Unknown=0, NotChecked=0, Total=870 [2022-03-20 15:54:42,016 INFO L913 BasicCegarLoop]: 71 mSDtfsCounter, 92 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:54:42,016 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 282 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:54:42,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2022-03-20 15:54:42,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 557. [2022-03-20 15:54:42,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 381 states have (on average 1.1076115485564304) internal successors, (422), 391 states have internal predecessors, (422), 107 states have call successors, (107), 69 states have call predecessors, (107), 68 states have return successors, (105), 96 states have call predecessors, (105), 105 states have call successors, (105) [2022-03-20 15:54:42,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 634 transitions. [2022-03-20 15:54:42,081 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 634 transitions. Word has length 150 [2022-03-20 15:54:42,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:54:42,082 INFO L478 AbstractCegarLoop]: Abstraction has 557 states and 634 transitions. [2022-03-20 15:54:42,082 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 12 states have internal predecessors, (68), 12 states have call successors, (24), 12 states have call predecessors, (24), 10 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) [2022-03-20 15:54:42,082 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 634 transitions. [2022-03-20 15:54:42,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-03-20 15:54:42,083 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:54:42,083 INFO L499 BasicCegarLoop]: trace histogram [24, 23, 23, 8, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:54:42,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-20 15:54:42,299 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:54:42,299 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:54:42,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:54:42,300 INFO L85 PathProgramCache]: Analyzing trace with hash 778901090, now seen corresponding path program 15 times [2022-03-20 15:54:42,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:54:42,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1306345111] [2022-03-20 15:54:42,302 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 15:54:42,302 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-20 15:54:42,302 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 15:54:42,302 INFO L85 PathProgramCache]: Analyzing trace with hash 778901090, now seen corresponding path program 16 times [2022-03-20 15:54:42,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:54:42,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281033004] [2022-03-20 15:54:42,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:54:42,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:54:42,307 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:54:42,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [241097575] [2022-03-20 15:54:42,308 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:54:42,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:54:42,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:54:42,309 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:54:42,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-20 15:54:49,306 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:54:49,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:54:49,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-20 15:54:49,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:54:49,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1216 backedges. 46 proven. 1106 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-20 15:54:49,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:54:49,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1216 backedges. 46 proven. 158 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2022-03-20 15:54:49,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:54:49,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281033004] [2022-03-20 15:54:49,780 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:54:49,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241097575] [2022-03-20 15:54:49,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241097575] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:54:49,780 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:54:49,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-03-20 15:54:49,780 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:54:49,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1306345111] [2022-03-20 15:54:49,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1306345111] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:54:49,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:54:49,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 15:54:49,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91271290] [2022-03-20 15:54:49,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:54:49,781 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 15:54:49,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:54:49,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 15:54:49,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-03-20 15:54:49,783 INFO L87 Difference]: Start difference. First operand 557 states and 634 transitions. Second operand has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 13 states have internal predecessors, (75), 13 states have call successors, (26), 13 states have call predecessors, (26), 11 states have return successors, (24), 11 states have call predecessors, (24), 11 states have call successors, (24) [2022-03-20 15:54:50,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:54:50,050 INFO L93 Difference]: Finished difference Result 665 states and 769 transitions. [2022-03-20 15:54:50,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 15:54:50,050 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 13 states have internal predecessors, (75), 13 states have call successors, (26), 13 states have call predecessors, (26), 11 states have return successors, (24), 11 states have call predecessors, (24), 11 states have call successors, (24) Word has length 164 [2022-03-20 15:54:50,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:54:50,052 INFO L225 Difference]: With dead ends: 665 [2022-03-20 15:54:50,052 INFO L226 Difference]: Without dead ends: 652 [2022-03-20 15:54:50,053 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=435, Invalid=621, Unknown=0, NotChecked=0, Total=1056 [2022-03-20 15:54:50,053 INFO L913 BasicCegarLoop]: 76 mSDtfsCounter, 140 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 15:54:50,053 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 275 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 15:54:50,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2022-03-20 15:54:50,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 651. [2022-03-20 15:54:50,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 651 states, 444 states have (on average 1.1081081081081081) internal successors, (492), 457 states have internal predecessors, (492), 128 states have call successors, (128), 79 states have call predecessors, (128), 78 states have return successors, (126), 114 states have call predecessors, (126), 126 states have call successors, (126) [2022-03-20 15:54:50,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 746 transitions. [2022-03-20 15:54:50,131 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 746 transitions. Word has length 164 [2022-03-20 15:54:50,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:54:50,131 INFO L478 AbstractCegarLoop]: Abstraction has 651 states and 746 transitions. [2022-03-20 15:54:50,132 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 13 states have internal predecessors, (75), 13 states have call successors, (26), 13 states have call predecessors, (26), 11 states have return successors, (24), 11 states have call predecessors, (24), 11 states have call successors, (24) [2022-03-20 15:54:50,132 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 746 transitions. [2022-03-20 15:54:50,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-03-20 15:54:50,133 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:54:50,133 INFO L499 BasicCegarLoop]: trace histogram [26, 25, 25, 9, 8, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:54:50,144 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-20 15:54:50,342 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:54:50,342 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:54:50,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:54:50,342 INFO L85 PathProgramCache]: Analyzing trace with hash 759159950, now seen corresponding path program 17 times [2022-03-20 15:54:50,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:54:50,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [795936167] [2022-03-20 15:54:50,347 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 15:54:50,347 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-20 15:54:50,347 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 15:54:50,348 INFO L85 PathProgramCache]: Analyzing trace with hash 759159950, now seen corresponding path program 18 times [2022-03-20 15:54:50,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:54:50,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893107060] [2022-03-20 15:54:50,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:54:50,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:54:50,354 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:54:50,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [499263467] [2022-03-20 15:54:50,354 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:54:50,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:54:50,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:54:50,355 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:54:50,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-20 15:54:50,450 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-20 15:54:50,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:54:50,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 15:54:50,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:54:50,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 723 proven. 34 refuted. 0 times theorem prover too weak. 695 trivial. 0 not checked. [2022-03-20 15:54:50,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:54:50,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 143 proven. 34 refuted. 0 times theorem prover too weak. 1275 trivial. 0 not checked. [2022-03-20 15:54:50,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:54:50,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893107060] [2022-03-20 15:54:50,906 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:54:50,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499263467] [2022-03-20 15:54:50,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499263467] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:54:50,906 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:54:50,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2022-03-20 15:54:50,906 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:54:50,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [795936167] [2022-03-20 15:54:50,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [795936167] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:54:50,906 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:54:50,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 15:54:50,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767764351] [2022-03-20 15:54:50,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:54:50,907 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 15:54:50,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:54:50,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 15:54:50,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-20 15:54:50,907 INFO L87 Difference]: Start difference. First operand 651 states and 746 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 5 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-03-20 15:54:51,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:54:51,002 INFO L93 Difference]: Finished difference Result 707 states and 811 transitions. [2022-03-20 15:54:51,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 15:54:51,003 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 5 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) Word has length 178 [2022-03-20 15:54:51,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:54:51,005 INFO L225 Difference]: With dead ends: 707 [2022-03-20 15:54:51,005 INFO L226 Difference]: Without dead ends: 553 [2022-03-20 15:54:51,005 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 348 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-20 15:54:51,006 INFO L913 BasicCegarLoop]: 65 mSDtfsCounter, 0 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 15:54:51,006 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 200 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 15:54:51,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2022-03-20 15:54:51,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 553. [2022-03-20 15:54:51,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 375 states have (on average 1.1066666666666667) internal successors, (415), 387 states have internal predecessors, (415), 110 states have call successors, (110), 68 states have call predecessors, (110), 67 states have return successors, (108), 97 states have call predecessors, (108), 108 states have call successors, (108) [2022-03-20 15:54:51,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 633 transitions. [2022-03-20 15:54:51,076 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 633 transitions. Word has length 178 [2022-03-20 15:54:51,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:54:51,076 INFO L478 AbstractCegarLoop]: Abstraction has 553 states and 633 transitions. [2022-03-20 15:54:51,077 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 5 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-03-20 15:54:51,077 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 633 transitions. [2022-03-20 15:54:51,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-03-20 15:54:51,078 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:54:51,078 INFO L499 BasicCegarLoop]: trace histogram [28, 27, 27, 8, 7, 7, 7, 7, 7, 7, 7, 7, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:54:51,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-20 15:54:51,291 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:54:51,291 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:54:51,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:54:51,292 INFO L85 PathProgramCache]: Analyzing trace with hash 221596463, now seen corresponding path program 5 times [2022-03-20 15:54:51,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:54:51,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [390443634] [2022-03-20 15:54:51,294 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 15:54:51,294 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-20 15:54:51,294 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 15:54:51,294 INFO L85 PathProgramCache]: Analyzing trace with hash 221596463, now seen corresponding path program 6 times [2022-03-20 15:54:51,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:54:51,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313535259] [2022-03-20 15:54:51,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:54:51,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:54:51,299 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:54:51,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1099732460] [2022-03-20 15:54:51,300 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:54:51,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:54:51,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:54:51,309 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:54:51,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-20 15:54:51,363 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 15:54:51,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:54:51,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 15:54:51,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:54:51,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1622 backedges. 559 proven. 0 refuted. 0 times theorem prover too weak. 1063 trivial. 0 not checked. [2022-03-20 15:54:51,536 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 15:54:51,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:54:51,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313535259] [2022-03-20 15:54:51,536 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:54:51,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099732460] [2022-03-20 15:54:51,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099732460] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:54:51,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:54:51,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 15:54:51,537 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:54:51,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [390443634] [2022-03-20 15:54:51,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [390443634] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:54:51,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:54:51,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 15:54:51,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597060251] [2022-03-20 15:54:51,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:54:51,538 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 15:54:51,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:54:51,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 15:54:51,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 15:54:51,539 INFO L87 Difference]: Start difference. First operand 553 states and 633 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 15:54:51,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:54:51,609 INFO L93 Difference]: Finished difference Result 640 states and 720 transitions. [2022-03-20 15:54:51,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 15:54:51,609 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 182 [2022-03-20 15:54:51,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:54:51,611 INFO L225 Difference]: With dead ends: 640 [2022-03-20 15:54:51,611 INFO L226 Difference]: Without dead ends: 527 [2022-03-20 15:54:51,612 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 15:54:51,612 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 8 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 15:54:51,612 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 144 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 15:54:51,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2022-03-20 15:54:51,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 525. [2022-03-20 15:54:51,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 356 states have (on average 1.0898876404494382) internal successors, (388), 366 states have internal predecessors, (388), 102 states have call successors, (102), 68 states have call predecessors, (102), 66 states have return successors, (99), 90 states have call predecessors, (99), 99 states have call successors, (99) [2022-03-20 15:54:51,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 589 transitions. [2022-03-20 15:54:51,677 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 589 transitions. Word has length 182 [2022-03-20 15:54:51,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:54:51,677 INFO L478 AbstractCegarLoop]: Abstraction has 525 states and 589 transitions. [2022-03-20 15:54:51,677 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 15:54:51,677 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 589 transitions. [2022-03-20 15:54:51,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-03-20 15:54:51,678 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:54:51,678 INFO L499 BasicCegarLoop]: trace histogram [27, 26, 26, 8, 7, 7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:54:51,709 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-03-20 15:54:51,910 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:54:51,910 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:54:51,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:54:51,911 INFO L85 PathProgramCache]: Analyzing trace with hash -553486584, now seen corresponding path program 19 times [2022-03-20 15:54:51,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:54:51,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2006781684] [2022-03-20 15:54:51,914 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 15:54:51,914 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-20 15:54:51,914 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 15:54:51,914 INFO L85 PathProgramCache]: Analyzing trace with hash -553486584, now seen corresponding path program 20 times [2022-03-20 15:54:51,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:54:51,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486970961] [2022-03-20 15:54:51,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:54:51,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:54:51,928 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:54:51,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1213576598] [2022-03-20 15:54:51,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:54:51,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:54:51,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:54:51,944 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:54:51,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-20 15:54:52,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:54:52,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:54:52,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-20 15:54:52,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:54:52,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1528 backedges. 52 proven. 1400 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-03-20 15:54:52,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:54:52,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1528 backedges. 52 proven. 176 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2022-03-20 15:54:52,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:54:52,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486970961] [2022-03-20 15:54:52,766 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:54:52,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213576598] [2022-03-20 15:54:52,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213576598] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:54:52,766 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:54:52,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2022-03-20 15:54:52,766 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:54:52,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2006781684] [2022-03-20 15:54:52,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2006781684] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:54:52,767 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:54:52,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 15:54:52,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673076953] [2022-03-20 15:54:52,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:54:52,767 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 15:54:52,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:54:52,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 15:54:52,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-03-20 15:54:52,768 INFO L87 Difference]: Start difference. First operand 525 states and 589 transitions. Second operand has 15 states, 15 states have (on average 5.4) internal successors, (81), 14 states have internal predecessors, (81), 14 states have call successors, (29), 14 states have call predecessors, (29), 12 states have return successors, (27), 12 states have call predecessors, (27), 12 states have call successors, (27) [2022-03-20 15:54:53,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:54:53,061 INFO L93 Difference]: Finished difference Result 619 states and 701 transitions. [2022-03-20 15:54:53,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 15:54:53,061 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.4) internal successors, (81), 14 states have internal predecessors, (81), 14 states have call successors, (29), 14 states have call predecessors, (29), 12 states have return successors, (27), 12 states have call predecessors, (27), 12 states have call successors, (27) Word has length 182 [2022-03-20 15:54:53,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:54:53,064 INFO L225 Difference]: With dead ends: 619 [2022-03-20 15:54:53,064 INFO L226 Difference]: Without dead ends: 596 [2022-03-20 15:54:53,064 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 337 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=491, Invalid=699, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 15:54:53,065 INFO L913 BasicCegarLoop]: 79 mSDtfsCounter, 105 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 15:54:53,065 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 328 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 15:54:53,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2022-03-20 15:54:53,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 595. [2022-03-20 15:54:53,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 403 states have (on average 1.0893300248138957) internal successors, (439), 415 states have internal predecessors, (439), 117 states have call successors, (117), 76 states have call predecessors, (117), 74 states have return successors, (114), 103 states have call predecessors, (114), 114 states have call successors, (114) [2022-03-20 15:54:53,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 670 transitions. [2022-03-20 15:54:53,133 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 670 transitions. Word has length 182 [2022-03-20 15:54:53,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:54:53,134 INFO L478 AbstractCegarLoop]: Abstraction has 595 states and 670 transitions. [2022-03-20 15:54:53,134 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.4) internal successors, (81), 14 states have internal predecessors, (81), 14 states have call successors, (29), 14 states have call predecessors, (29), 12 states have return successors, (27), 12 states have call predecessors, (27), 12 states have call successors, (27) [2022-03-20 15:54:53,134 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 670 transitions. [2022-03-20 15:54:53,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-03-20 15:54:53,135 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:54:53,135 INFO L499 BasicCegarLoop]: trace histogram [29, 28, 28, 9, 8, 8, 8, 8, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:54:53,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-20 15:54:53,348 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,SelfDestructingSolverStorable33 [2022-03-20 15:54:53,349 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:54:53,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:54:53,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1093935796, now seen corresponding path program 21 times [2022-03-20 15:54:53,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:54:53,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1625558135] [2022-03-20 15:54:53,351 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 15:54:53,351 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-20 15:54:53,351 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 15:54:53,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1093935796, now seen corresponding path program 22 times [2022-03-20 15:54:53,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:54:53,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168931051] [2022-03-20 15:54:53,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:54:53,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:54:53,357 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:54:53,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2143622497] [2022-03-20 15:54:53,357 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:54:53,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:54:53,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:54:53,359 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:54:53,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-20 15:54:59,477 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:54:59,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:54:59,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-20 15:54:59,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:54:59,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1788 backedges. 56 proven. 1652 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-03-20 15:54:59,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:55:00,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1788 backedges. 56 proven. 220 refuted. 0 times theorem prover too weak. 1512 trivial. 0 not checked. [2022-03-20 15:55:00,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:55:00,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168931051] [2022-03-20 15:55:00,153 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:55:00,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143622497] [2022-03-20 15:55:00,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143622497] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:55:00,153 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:55:00,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2022-03-20 15:55:00,154 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:55:00,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1625558135] [2022-03-20 15:55:00,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1625558135] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:55:00,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:55:00,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 15:55:00,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59894338] [2022-03-20 15:55:00,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:55:00,154 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 15:55:00,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:55:00,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 15:55:00,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-03-20 15:55:00,155 INFO L87 Difference]: Start difference. First operand 595 states and 670 transitions. Second operand has 16 states, 16 states have (on average 5.5) internal successors, (88), 15 states have internal predecessors, (88), 15 states have call successors, (31), 15 states have call predecessors, (31), 13 states have return successors, (29), 13 states have call predecessors, (29), 13 states have call successors, (29) [2022-03-20 15:55:00,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:55:00,457 INFO L93 Difference]: Finished difference Result 689 states and 782 transitions. [2022-03-20 15:55:00,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-20 15:55:00,458 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.5) internal successors, (88), 15 states have internal predecessors, (88), 15 states have call successors, (31), 15 states have call predecessors, (31), 13 states have return successors, (29), 13 states have call predecessors, (29), 13 states have call successors, (29) Word has length 196 [2022-03-20 15:55:00,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:55:00,460 INFO L225 Difference]: With dead ends: 689 [2022-03-20 15:55:00,460 INFO L226 Difference]: Without dead ends: 666 [2022-03-20 15:55:00,461 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=583, Invalid=823, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 15:55:00,461 INFO L913 BasicCegarLoop]: 84 mSDtfsCounter, 121 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 15:55:00,461 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 330 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 15:55:00,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2022-03-20 15:55:00,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 665. [2022-03-20 15:55:00,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 450 states have (on average 1.0888888888888888) internal successors, (490), 464 states have internal predecessors, (490), 132 states have call successors, (132), 84 states have call predecessors, (132), 82 states have return successors, (129), 116 states have call predecessors, (129), 129 states have call successors, (129) [2022-03-20 15:55:00,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 751 transitions. [2022-03-20 15:55:00,525 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 751 transitions. Word has length 196 [2022-03-20 15:55:00,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:55:00,526 INFO L478 AbstractCegarLoop]: Abstraction has 665 states and 751 transitions. [2022-03-20 15:55:00,526 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.5) internal successors, (88), 15 states have internal predecessors, (88), 15 states have call successors, (31), 15 states have call predecessors, (31), 13 states have return successors, (29), 13 states have call predecessors, (29), 13 states have call successors, (29) [2022-03-20 15:55:00,526 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 751 transitions. [2022-03-20 15:55:00,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-03-20 15:55:00,527 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:55:00,527 INFO L499 BasicCegarLoop]: trace histogram [31, 30, 30, 10, 9, 9, 9, 9, 9, 9, 9, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:55:00,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-20 15:55:00,738 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:55:00,739 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:55:00,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:55:00,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1762259296, now seen corresponding path program 23 times [2022-03-20 15:55:00,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:55:00,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1303524211] [2022-03-20 15:55:00,741 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 15:55:00,741 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-20 15:55:00,741 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 15:55:00,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1762259296, now seen corresponding path program 24 times [2022-03-20 15:55:00,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:55:00,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602642500] [2022-03-20 15:55:00,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:55:00,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:55:00,750 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:55:00,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1630964039] [2022-03-20 15:55:00,750 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:55:00,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:55:00,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:55:00,758 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:55:00,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-20 15:55:00,884 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-03-20 15:55:00,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:55:00,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 15:55:00,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:55:01,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 966 proven. 69 refuted. 0 times theorem prover too weak. 1035 trivial. 0 not checked. [2022-03-20 15:55:01,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:55:01,457 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 186 proven. 69 refuted. 0 times theorem prover too weak. 1815 trivial. 0 not checked. [2022-03-20 15:55:01,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:55:01,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602642500] [2022-03-20 15:55:01,458 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:55:01,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630964039] [2022-03-20 15:55:01,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630964039] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:55:01,458 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:55:01,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2022-03-20 15:55:01,458 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:55:01,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1303524211] [2022-03-20 15:55:01,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1303524211] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:55:01,459 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:55:01,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 15:55:01,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575565951] [2022-03-20 15:55:01,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:55:01,459 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 15:55:01,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:55:01,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 15:55:01,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-03-20 15:55:01,460 INFO L87 Difference]: Start difference. First operand 665 states and 751 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 6 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) [2022-03-20 15:55:01,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:55:01,577 INFO L93 Difference]: Finished difference Result 781 states and 891 transitions. [2022-03-20 15:55:01,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 15:55:01,577 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 6 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) Word has length 210 [2022-03-20 15:55:01,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:55:01,579 INFO L225 Difference]: With dead ends: 781 [2022-03-20 15:55:01,579 INFO L226 Difference]: Without dead ends: 613 [2022-03-20 15:55:01,580 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 410 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-03-20 15:55:01,580 INFO L913 BasicCegarLoop]: 80 mSDtfsCounter, 2 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:55:01,580 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 298 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:55:01,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2022-03-20 15:55:01,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 613. [2022-03-20 15:55:01,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 613 states, 415 states have (on average 1.0867469879518072) internal successors, (451), 427 states have internal predecessors, (451), 120 states have call successors, (120), 79 states have call predecessors, (120), 77 states have return successors, (117), 106 states have call predecessors, (117), 117 states have call successors, (117) [2022-03-20 15:55:01,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 688 transitions. [2022-03-20 15:55:01,641 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 688 transitions. Word has length 210 [2022-03-20 15:55:01,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:55:01,641 INFO L478 AbstractCegarLoop]: Abstraction has 613 states and 688 transitions. [2022-03-20 15:55:01,641 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 6 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) [2022-03-20 15:55:01,641 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 688 transitions. [2022-03-20 15:55:01,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2022-03-20 15:55:01,643 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:55:01,643 INFO L499 BasicCegarLoop]: trace histogram [32, 31, 31, 9, 8, 8, 8, 8, 8, 8, 8, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:55:01,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-20 15:55:01,861 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:55:01,861 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:55:01,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:55:01,862 INFO L85 PathProgramCache]: Analyzing trace with hash -567448742, now seen corresponding path program 25 times [2022-03-20 15:55:01,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:55:01,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [596386807] [2022-03-20 15:55:01,864 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 15:55:01,864 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-20 15:55:01,864 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 15:55:01,864 INFO L85 PathProgramCache]: Analyzing trace with hash -567448742, now seen corresponding path program 26 times [2022-03-20 15:55:01,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:55:01,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022630835] [2022-03-20 15:55:01,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:55:01,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:55:01,871 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:55:01,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1719354605] [2022-03-20 15:55:01,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:55:01,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:55:01,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:55:01,872 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:55:01,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-20 15:55:01,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:55:01,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:55:01,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-20 15:55:01,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:55:02,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2166 backedges. 62 proven. 2012 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-03-20 15:55:02,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:55:02,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2166 backedges. 62 proven. 244 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2022-03-20 15:55:02,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:55:02,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022630835] [2022-03-20 15:55:02,689 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:55:02,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719354605] [2022-03-20 15:55:02,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719354605] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:55:02,689 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:55:02,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2022-03-20 15:55:02,689 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:55:02,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [596386807] [2022-03-20 15:55:02,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [596386807] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:55:02,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:55:02,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 15:55:02,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628321025] [2022-03-20 15:55:02,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:55:02,690 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 15:55:02,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:55:02,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 15:55:02,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-03-20 15:55:02,691 INFO L87 Difference]: Start difference. First operand 613 states and 688 transitions. Second operand has 17 states, 17 states have (on average 5.529411764705882) internal successors, (94), 16 states have internal predecessors, (94), 16 states have call successors, (34), 16 states have call predecessors, (34), 14 states have return successors, (32), 14 states have call predecessors, (32), 14 states have call successors, (32) [2022-03-20 15:55:03,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:55:03,015 INFO L93 Difference]: Finished difference Result 707 states and 800 transitions. [2022-03-20 15:55:03,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-20 15:55:03,016 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.529411764705882) internal successors, (94), 16 states have internal predecessors, (94), 16 states have call successors, (34), 16 states have call predecessors, (34), 14 states have return successors, (32), 14 states have call predecessors, (32), 14 states have call successors, (32) Word has length 214 [2022-03-20 15:55:03,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:55:03,018 INFO L225 Difference]: With dead ends: 707 [2022-03-20 15:55:03,018 INFO L226 Difference]: Without dead ends: 684 [2022-03-20 15:55:03,020 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 397 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=648, Invalid=912, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 15:55:03,020 INFO L913 BasicCegarLoop]: 87 mSDtfsCounter, 140 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 15:55:03,020 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 334 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 15:55:03,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2022-03-20 15:55:03,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 683. [2022-03-20 15:55:03,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 462 states have (on average 1.0865800865800865) internal successors, (502), 476 states have internal predecessors, (502), 135 states have call successors, (135), 87 states have call predecessors, (135), 85 states have return successors, (132), 119 states have call predecessors, (132), 132 states have call successors, (132) [2022-03-20 15:55:03,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 769 transitions. [2022-03-20 15:55:03,097 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 769 transitions. Word has length 214 [2022-03-20 15:55:03,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:55:03,098 INFO L478 AbstractCegarLoop]: Abstraction has 683 states and 769 transitions. [2022-03-20 15:55:03,098 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.529411764705882) internal successors, (94), 16 states have internal predecessors, (94), 16 states have call successors, (34), 16 states have call predecessors, (34), 14 states have return successors, (32), 14 states have call predecessors, (32), 14 states have call successors, (32) [2022-03-20 15:55:03,098 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 769 transitions. [2022-03-20 15:55:03,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2022-03-20 15:55:03,099 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:55:03,099 INFO L499 BasicCegarLoop]: trace histogram [34, 33, 33, 10, 9, 9, 9, 9, 9, 9, 9, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:55:03,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-20 15:55:03,316 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,SelfDestructingSolverStorable36 [2022-03-20 15:55:03,317 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:55:03,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:55:03,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1483480966, now seen corresponding path program 27 times [2022-03-20 15:55:03,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:55:03,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2080075690] [2022-03-20 15:55:03,319 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 15:55:03,319 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-20 15:55:03,319 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 15:55:03,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1483480966, now seen corresponding path program 28 times [2022-03-20 15:55:03,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:55:03,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810755614] [2022-03-20 15:55:03,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:55:03,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:55:03,328 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:55:03,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [167225265] [2022-03-20 15:55:03,328 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:55:03,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:55:03,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:55:03,329 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:55:03,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-20 15:55:04,410 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:55:04,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:55:04,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-20 15:55:04,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:55:04,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2472 backedges. 66 proven. 2310 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-03-20 15:55:04,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:55:05,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2472 backedges. 66 proven. 294 refuted. 0 times theorem prover too weak. 2112 trivial. 0 not checked. [2022-03-20 15:55:05,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:55:05,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810755614] [2022-03-20 15:55:05,283 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:55:05,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167225265] [2022-03-20 15:55:05,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167225265] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:55:05,283 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:55:05,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2022-03-20 15:55:05,284 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:55:05,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2080075690] [2022-03-20 15:55:05,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2080075690] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:55:05,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:55:05,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 15:55:05,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294667819] [2022-03-20 15:55:05,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:55:05,285 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 15:55:05,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:55:05,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 15:55:05,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 15:55:05,286 INFO L87 Difference]: Start difference. First operand 683 states and 769 transitions. Second operand has 18 states, 18 states have (on average 5.611111111111111) internal successors, (101), 17 states have internal predecessors, (101), 17 states have call successors, (36), 17 states have call predecessors, (36), 15 states have return successors, (34), 15 states have call predecessors, (34), 15 states have call successors, (34) [2022-03-20 15:55:05,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:55:05,663 INFO L93 Difference]: Finished difference Result 777 states and 881 transitions. [2022-03-20 15:55:05,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-20 15:55:05,663 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.611111111111111) internal successors, (101), 17 states have internal predecessors, (101), 17 states have call successors, (36), 17 states have call predecessors, (36), 15 states have return successors, (34), 15 states have call predecessors, (34), 15 states have call successors, (34) Word has length 228 [2022-03-20 15:55:05,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:55:05,666 INFO L225 Difference]: With dead ends: 777 [2022-03-20 15:55:05,666 INFO L226 Difference]: Without dead ends: 754 [2022-03-20 15:55:05,667 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 423 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=753, Invalid=1053, Unknown=0, NotChecked=0, Total=1806 [2022-03-20 15:55:05,667 INFO L913 BasicCegarLoop]: 92 mSDtfsCounter, 183 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 15:55:05,667 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 335 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 15:55:05,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2022-03-20 15:55:05,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 753. [2022-03-20 15:55:05,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 509 states have (on average 1.0864440078585462) internal successors, (553), 525 states have internal predecessors, (553), 150 states have call successors, (150), 95 states have call predecessors, (150), 93 states have return successors, (147), 132 states have call predecessors, (147), 147 states have call successors, (147) [2022-03-20 15:55:05,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 850 transitions. [2022-03-20 15:55:05,740 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 850 transitions. Word has length 228 [2022-03-20 15:55:05,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:55:05,741 INFO L478 AbstractCegarLoop]: Abstraction has 753 states and 850 transitions. [2022-03-20 15:55:05,741 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.611111111111111) internal successors, (101), 17 states have internal predecessors, (101), 17 states have call successors, (36), 17 states have call predecessors, (36), 15 states have return successors, (34), 15 states have call predecessors, (34), 15 states have call successors, (34) [2022-03-20 15:55:05,741 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 850 transitions. [2022-03-20 15:55:05,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2022-03-20 15:55:05,743 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:55:05,743 INFO L499 BasicCegarLoop]: trace histogram [36, 35, 35, 11, 10, 10, 10, 10, 10, 10, 10, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:55:05,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-20 15:55:05,950 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,SelfDestructingSolverStorable37 [2022-03-20 15:55:05,950 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:55:05,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:55:05,950 INFO L85 PathProgramCache]: Analyzing trace with hash -963242318, now seen corresponding path program 29 times [2022-03-20 15:55:05,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:55:05,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [716405760] [2022-03-20 15:55:05,952 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 15:55:05,952 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-20 15:55:05,953 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 15:55:05,953 INFO L85 PathProgramCache]: Analyzing trace with hash -963242318, now seen corresponding path program 30 times [2022-03-20 15:55:05,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:55:05,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680586835] [2022-03-20 15:55:05,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:55:05,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:55:05,960 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:55:05,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [885387083] [2022-03-20 15:55:05,960 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:55:05,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:55:05,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:55:05,961 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:55:05,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-20 15:55:06,119 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-03-20 15:55:06,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:55:06,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-20 15:55:06,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:55:06,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2800 backedges. 1209 proven. 116 refuted. 0 times theorem prover too weak. 1475 trivial. 0 not checked. [2022-03-20 15:55:06,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:55:07,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2800 backedges. 229 proven. 116 refuted. 0 times theorem prover too weak. 2455 trivial. 0 not checked. [2022-03-20 15:55:07,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:55:07,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680586835] [2022-03-20 15:55:07,010 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:55:07,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885387083] [2022-03-20 15:55:07,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885387083] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:55:07,010 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:55:07,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2022-03-20 15:55:07,010 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:55:07,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [716405760] [2022-03-20 15:55:07,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [716405760] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:55:07,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:55:07,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 15:55:07,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966000792] [2022-03-20 15:55:07,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:55:07,011 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 15:55:07,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:55:07,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 15:55:07,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-03-20 15:55:07,011 INFO L87 Difference]: Start difference. First operand 753 states and 850 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 7 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 7 states have call predecessors, (28), 7 states have call successors, (28) [2022-03-20 15:55:07,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:55:07,174 INFO L93 Difference]: Finished difference Result 881 states and 1008 transitions. [2022-03-20 15:55:07,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 15:55:07,175 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 7 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 7 states have call predecessors, (28), 7 states have call successors, (28) Word has length 242 [2022-03-20 15:55:07,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:55:07,178 INFO L225 Difference]: With dead ends: 881 [2022-03-20 15:55:07,178 INFO L226 Difference]: Without dead ends: 701 [2022-03-20 15:55:07,179 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 472 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-03-20 15:55:07,179 INFO L913 BasicCegarLoop]: 95 mSDtfsCounter, 3 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:55:07,180 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 417 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:55:07,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2022-03-20 15:55:07,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 701. [2022-03-20 15:55:07,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 701 states, 474 states have (on average 1.0843881856540085) internal successors, (514), 488 states have internal predecessors, (514), 138 states have call successors, (138), 90 states have call predecessors, (138), 88 states have return successors, (135), 122 states have call predecessors, (135), 135 states have call successors, (135) [2022-03-20 15:55:07,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 787 transitions. [2022-03-20 15:55:07,268 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 787 transitions. Word has length 242 [2022-03-20 15:55:07,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:55:07,269 INFO L478 AbstractCegarLoop]: Abstraction has 701 states and 787 transitions. [2022-03-20 15:55:07,269 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 7 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 7 states have call predecessors, (28), 7 states have call successors, (28) [2022-03-20 15:55:07,269 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 787 transitions. [2022-03-20 15:55:07,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2022-03-20 15:55:07,271 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:55:07,271 INFO L499 BasicCegarLoop]: trace histogram [37, 36, 36, 10, 9, 9, 9, 9, 9, 9, 9, 6, 6, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:55:07,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-20 15:55:07,483 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,SelfDestructingSolverStorable38 [2022-03-20 15:55:07,483 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:55:07,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:55:07,483 INFO L85 PathProgramCache]: Analyzing trace with hash 405360684, now seen corresponding path program 31 times [2022-03-20 15:55:07,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:55:07,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [207449269] [2022-03-20 15:55:07,485 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 15:55:07,486 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-20 15:55:07,486 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 15:55:07,486 INFO L85 PathProgramCache]: Analyzing trace with hash 405360684, now seen corresponding path program 32 times [2022-03-20 15:55:07,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:55:07,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449199896] [2022-03-20 15:55:07,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:55:07,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:55:07,492 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:55:07,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [446286805] [2022-03-20 15:55:07,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:55:07,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:55:07,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:55:07,494 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:55:07,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-20 15:55:07,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:55:07,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:55:07,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 590 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-20 15:55:07,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:55:07,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 72 proven. 2736 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-03-20 15:55:07,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:55:08,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 72 proven. 324 refuted. 0 times theorem prover too weak. 2520 trivial. 0 not checked. [2022-03-20 15:55:08,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:55:08,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449199896] [2022-03-20 15:55:08,604 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:55:08,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446286805] [2022-03-20 15:55:08,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446286805] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:55:08,605 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:55:08,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2022-03-20 15:55:08,605 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:55:08,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [207449269] [2022-03-20 15:55:08,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [207449269] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:55:08,605 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:55:08,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 15:55:08,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95899028] [2022-03-20 15:55:08,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:55:08,605 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 15:55:08,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:55:08,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 15:55:08,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 15:55:08,606 INFO L87 Difference]: Start difference. First operand 701 states and 787 transitions. Second operand has 19 states, 19 states have (on average 5.631578947368421) internal successors, (107), 18 states have internal predecessors, (107), 18 states have call successors, (39), 18 states have call predecessors, (39), 16 states have return successors, (37), 16 states have call predecessors, (37), 16 states have call successors, (37) [2022-03-20 15:55:08,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:55:08,996 INFO L93 Difference]: Finished difference Result 795 states and 899 transitions. [2022-03-20 15:55:08,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-20 15:55:08,996 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.631578947368421) internal successors, (107), 18 states have internal predecessors, (107), 18 states have call successors, (39), 18 states have call predecessors, (39), 16 states have return successors, (37), 16 states have call predecessors, (37), 16 states have call successors, (37) Word has length 246 [2022-03-20 15:55:08,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:55:08,999 INFO L225 Difference]: With dead ends: 795 [2022-03-20 15:55:08,999 INFO L226 Difference]: Without dead ends: 772 [2022-03-20 15:55:09,000 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 457 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=827, Invalid=1153, Unknown=0, NotChecked=0, Total=1980 [2022-03-20 15:55:09,000 INFO L913 BasicCegarLoop]: 95 mSDtfsCounter, 145 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 15:55:09,001 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 379 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 15:55:09,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2022-03-20 15:55:09,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 771. [2022-03-20 15:55:09,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 771 states, 521 states have (on average 1.0844529750479845) internal successors, (565), 537 states have internal predecessors, (565), 153 states have call successors, (153), 98 states have call predecessors, (153), 96 states have return successors, (150), 135 states have call predecessors, (150), 150 states have call successors, (150) [2022-03-20 15:55:09,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 868 transitions. [2022-03-20 15:55:09,078 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 868 transitions. Word has length 246 [2022-03-20 15:55:09,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:55:09,078 INFO L478 AbstractCegarLoop]: Abstraction has 771 states and 868 transitions. [2022-03-20 15:55:09,078 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.631578947368421) internal successors, (107), 18 states have internal predecessors, (107), 18 states have call successors, (39), 18 states have call predecessors, (39), 16 states have return successors, (37), 16 states have call predecessors, (37), 16 states have call successors, (37) [2022-03-20 15:55:09,078 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 868 transitions. [2022-03-20 15:55:09,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2022-03-20 15:55:09,080 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:55:09,080 INFO L499 BasicCegarLoop]: trace histogram [39, 38, 38, 11, 10, 10, 10, 10, 10, 10, 10, 6, 6, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:55:09,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-20 15:55:09,297 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-20 15:55:09,298 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:55:09,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:55:09,298 INFO L85 PathProgramCache]: Analyzing trace with hash 533081304, now seen corresponding path program 33 times [2022-03-20 15:55:09,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:55:09,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [833822190] [2022-03-20 15:55:09,300 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 15:55:09,300 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-20 15:55:09,300 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 15:55:09,300 INFO L85 PathProgramCache]: Analyzing trace with hash 533081304, now seen corresponding path program 34 times [2022-03-20 15:55:09,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:55:09,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999518677] [2022-03-20 15:55:09,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:55:09,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:55:09,311 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:55:09,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [519915973] [2022-03-20 15:55:09,311 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:55:09,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:55:09,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:55:09,312 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:55:09,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-20 15:55:15,150 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:55:15,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:55:15,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-20 15:55:15,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:55:15,648 INFO L134 CoverageAnalysis]: Checked inductivity of 3268 backedges. 76 proven. 3080 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-20 15:55:15,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:55:16,171 INFO L134 CoverageAnalysis]: Checked inductivity of 3268 backedges. 76 proven. 380 refuted. 0 times theorem prover too weak. 2812 trivial. 0 not checked. [2022-03-20 15:55:16,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:55:16,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999518677] [2022-03-20 15:55:16,171 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:55:16,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519915973] [2022-03-20 15:55:16,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519915973] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:55:16,171 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:55:16,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2022-03-20 15:55:16,172 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:55:16,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [833822190] [2022-03-20 15:55:16,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [833822190] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:55:16,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:55:16,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 15:55:16,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623996644] [2022-03-20 15:55:16,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:55:16,172 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 15:55:16,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:55:16,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 15:55:16,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 15:55:16,173 INFO L87 Difference]: Start difference. First operand 771 states and 868 transitions. Second operand has 20 states, 20 states have (on average 5.7) internal successors, (114), 19 states have internal predecessors, (114), 19 states have call successors, (41), 19 states have call predecessors, (41), 17 states have return successors, (39), 17 states have call predecessors, (39), 17 states have call successors, (39) [2022-03-20 15:55:16,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:55:16,529 INFO L93 Difference]: Finished difference Result 865 states and 980 transitions. [2022-03-20 15:55:16,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-20 15:55:16,555 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.7) internal successors, (114), 19 states have internal predecessors, (114), 19 states have call successors, (41), 19 states have call predecessors, (41), 17 states have return successors, (39), 17 states have call predecessors, (39), 17 states have call successors, (39) Word has length 260 [2022-03-20 15:55:16,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:55:16,558 INFO L225 Difference]: With dead ends: 865 [2022-03-20 15:55:16,558 INFO L226 Difference]: Without dead ends: 842 [2022-03-20 15:55:16,559 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 529 GetRequests, 483 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=945, Invalid=1311, Unknown=0, NotChecked=0, Total=2256 [2022-03-20 15:55:16,559 INFO L913 BasicCegarLoop]: 100 mSDtfsCounter, 243 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 329 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 329 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 15:55:16,563 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 360 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [329 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 15:55:16,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2022-03-20 15:55:16,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 841. [2022-03-20 15:55:16,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 568 states have (on average 1.0845070422535212) internal successors, (616), 586 states have internal predecessors, (616), 168 states have call successors, (168), 106 states have call predecessors, (168), 104 states have return successors, (165), 148 states have call predecessors, (165), 165 states have call successors, (165) [2022-03-20 15:55:16,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 949 transitions. [2022-03-20 15:55:16,653 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 949 transitions. Word has length 260 [2022-03-20 15:55:16,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:55:16,654 INFO L478 AbstractCegarLoop]: Abstraction has 841 states and 949 transitions. [2022-03-20 15:55:16,654 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.7) internal successors, (114), 19 states have internal predecessors, (114), 19 states have call successors, (41), 19 states have call predecessors, (41), 17 states have return successors, (39), 17 states have call predecessors, (39), 17 states have call successors, (39) [2022-03-20 15:55:16,654 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 949 transitions. [2022-03-20 15:55:16,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2022-03-20 15:55:16,656 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:55:16,656 INFO L499 BasicCegarLoop]: trace histogram [41, 40, 40, 12, 11, 11, 11, 11, 11, 11, 11, 6, 6, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:55:16,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-20 15:55:16,865 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:55:16,865 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:55:16,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:55:16,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1793233788, now seen corresponding path program 35 times [2022-03-20 15:55:16,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:55:16,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2097919212] [2022-03-20 15:55:16,868 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 15:55:16,868 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-20 15:55:16,868 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 15:55:16,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1793233788, now seen corresponding path program 36 times [2022-03-20 15:55:16,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:55:16,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242780415] [2022-03-20 15:55:16,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:55:16,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:55:16,876 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:55:16,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [472301834] [2022-03-20 15:55:16,876 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:55:16,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:55:16,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:55:16,887 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:55:16,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-20 15:55:17,072 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-03-20 15:55:17,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:55:17,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-20 15:55:17,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:55:17,309 INFO L134 CoverageAnalysis]: Checked inductivity of 3642 backedges. 1452 proven. 175 refuted. 0 times theorem prover too weak. 2015 trivial. 0 not checked. [2022-03-20 15:55:17,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:55:18,244 INFO L134 CoverageAnalysis]: Checked inductivity of 3642 backedges. 278 proven. 169 refuted. 0 times theorem prover too weak. 3195 trivial. 0 not checked. [2022-03-20 15:55:18,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:55:18,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242780415] [2022-03-20 15:55:18,244 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:55:18,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472301834] [2022-03-20 15:55:18,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472301834] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:55:18,244 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:55:18,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2022-03-20 15:55:18,245 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:55:18,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2097919212] [2022-03-20 15:55:18,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2097919212] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:55:18,245 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:55:18,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 15:55:18,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702517226] [2022-03-20 15:55:18,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:55:18,246 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 15:55:18,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:55:18,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 15:55:18,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-03-20 15:55:18,252 INFO L87 Difference]: Start difference. First operand 841 states and 949 transitions. Second operand has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 8 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (33), 8 states have call predecessors, (33), 8 states have call successors, (33) [2022-03-20 15:55:18,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:55:18,409 INFO L93 Difference]: Finished difference Result 981 states and 1125 transitions. [2022-03-20 15:55:18,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 15:55:18,409 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 8 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (33), 8 states have call predecessors, (33), 8 states have call successors, (33) Word has length 274 [2022-03-20 15:55:18,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:55:18,424 INFO L225 Difference]: With dead ends: 981 [2022-03-20 15:55:18,424 INFO L226 Difference]: Without dead ends: 789 [2022-03-20 15:55:18,425 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 547 GetRequests, 534 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-03-20 15:55:18,439 INFO L913 BasicCegarLoop]: 110 mSDtfsCounter, 4 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:55:18,439 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 556 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:55:18,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2022-03-20 15:55:18,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 789. [2022-03-20 15:55:18,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 789 states, 533 states have (on average 1.0825515947467168) internal successors, (577), 549 states have internal predecessors, (577), 156 states have call successors, (156), 101 states have call predecessors, (156), 99 states have return successors, (153), 138 states have call predecessors, (153), 153 states have call successors, (153) [2022-03-20 15:55:18,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 886 transitions. [2022-03-20 15:55:18,581 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 886 transitions. Word has length 274 [2022-03-20 15:55:18,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:55:18,581 INFO L478 AbstractCegarLoop]: Abstraction has 789 states and 886 transitions. [2022-03-20 15:55:18,581 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 8 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (33), 8 states have call predecessors, (33), 8 states have call successors, (33) [2022-03-20 15:55:18,581 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 886 transitions. [2022-03-20 15:55:18,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-03-20 15:55:18,583 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:55:18,583 INFO L499 BasicCegarLoop]: trace histogram [42, 41, 41, 11, 10, 10, 10, 10, 10, 10, 10, 7, 7, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:55:18,602 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-03-20 15:55:18,783 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,SelfDestructingSolverStorable41 [2022-03-20 15:55:18,784 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:55:18,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:55:18,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1196997250, now seen corresponding path program 37 times [2022-03-20 15:55:18,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:55:18,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [451604546] [2022-03-20 15:55:18,786 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 15:55:18,786 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-20 15:55:18,786 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 15:55:18,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1196997250, now seen corresponding path program 38 times [2022-03-20 15:55:18,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:55:18,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065808065] [2022-03-20 15:55:18,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:55:18,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:55:18,806 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:55:18,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [936251076] [2022-03-20 15:55:18,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:55:18,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:55:18,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:55:18,807 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:55:18,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-20 15:55:18,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:55:18,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:55:18,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-20 15:55:18,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:55:19,395 INFO L134 CoverageAnalysis]: Checked inductivity of 3778 backedges. 82 proven. 3572 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-03-20 15:55:19,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:55:20,062 INFO L134 CoverageAnalysis]: Checked inductivity of 3778 backedges. 82 proven. 416 refuted. 0 times theorem prover too weak. 3280 trivial. 0 not checked. [2022-03-20 15:55:20,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:55:20,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065808065] [2022-03-20 15:55:20,062 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:55:20,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936251076] [2022-03-20 15:55:20,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936251076] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:55:20,063 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:55:20,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 40 [2022-03-20 15:55:20,063 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:55:20,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [451604546] [2022-03-20 15:55:20,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [451604546] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:55:20,063 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:55:20,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 15:55:20,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434706516] [2022-03-20 15:55:20,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:55:20,064 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 15:55:20,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:55:20,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 15:55:20,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=708, Invalid=852, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 15:55:20,079 INFO L87 Difference]: Start difference. First operand 789 states and 886 transitions. Second operand has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 20 states have internal predecessors, (120), 20 states have call successors, (44), 20 states have call predecessors, (44), 18 states have return successors, (42), 18 states have call predecessors, (42), 18 states have call successors, (42) [2022-03-20 15:55:20,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:55:20,529 INFO L93 Difference]: Finished difference Result 883 states and 998 transitions. [2022-03-20 15:55:20,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-20 15:55:20,529 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 20 states have internal predecessors, (120), 20 states have call successors, (44), 20 states have call predecessors, (44), 18 states have return successors, (42), 18 states have call predecessors, (42), 18 states have call successors, (42) Word has length 278 [2022-03-20 15:55:20,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:55:20,532 INFO L225 Difference]: With dead ends: 883 [2022-03-20 15:55:20,532 INFO L226 Difference]: Without dead ends: 860 [2022-03-20 15:55:20,533 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 565 GetRequests, 517 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1028, Invalid=1422, Unknown=0, NotChecked=0, Total=2450 [2022-03-20 15:55:20,533 INFO L913 BasicCegarLoop]: 103 mSDtfsCounter, 208 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 15:55:20,533 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 390 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 15:55:20,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2022-03-20 15:55:20,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 859. [2022-03-20 15:55:20,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 580 states have (on average 1.0827586206896551) internal successors, (628), 598 states have internal predecessors, (628), 171 states have call successors, (171), 109 states have call predecessors, (171), 107 states have return successors, (168), 151 states have call predecessors, (168), 168 states have call successors, (168) [2022-03-20 15:55:20,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 967 transitions. [2022-03-20 15:55:20,613 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 967 transitions. Word has length 278 [2022-03-20 15:55:20,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:55:20,614 INFO L478 AbstractCegarLoop]: Abstraction has 859 states and 967 transitions. [2022-03-20 15:55:20,614 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 20 states have internal predecessors, (120), 20 states have call successors, (44), 20 states have call predecessors, (44), 18 states have return successors, (42), 18 states have call predecessors, (42), 18 states have call successors, (42) [2022-03-20 15:55:20,614 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 967 transitions. [2022-03-20 15:55:20,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2022-03-20 15:55:20,616 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:55:20,616 INFO L499 BasicCegarLoop]: trace histogram [44, 43, 43, 12, 11, 11, 11, 11, 11, 11, 11, 7, 7, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:55:20,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-20 15:55:20,851 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-03-20 15:55:20,851 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:55:20,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:55:20,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1719364266, now seen corresponding path program 39 times [2022-03-20 15:55:20,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:55:20,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1088438158] [2022-03-20 15:55:20,855 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 15:55:20,855 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-20 15:55:20,855 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 15:55:20,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1719364266, now seen corresponding path program 40 times [2022-03-20 15:55:20,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:55:20,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468834206] [2022-03-20 15:55:20,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:55:20,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:55:20,869 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:55:20,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1908482856] [2022-03-20 15:55:20,869 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:55:20,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:55:20,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:55:20,870 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:55:20,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-20 15:56:08,524 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:56:08,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:56:08,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-20 15:56:08,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:56:09,058 INFO L134 CoverageAnalysis]: Checked inductivity of 4176 backedges. 86 proven. 3962 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-03-20 15:56:09,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:56:09,532 INFO L134 CoverageAnalysis]: Checked inductivity of 4176 backedges. 86 proven. 478 refuted. 0 times theorem prover too weak. 3612 trivial. 0 not checked. [2022-03-20 15:56:09,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:56:09,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468834206] [2022-03-20 15:56:09,533 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:56:09,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908482856] [2022-03-20 15:56:09,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908482856] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:56:09,533 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:56:09,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2022-03-20 15:56:09,533 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:56:09,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1088438158] [2022-03-20 15:56:09,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1088438158] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:56:09,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:56:09,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-20 15:56:09,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533713035] [2022-03-20 15:56:09,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:56:09,534 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 15:56:09,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:56:09,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 15:56:09,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=937, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 15:56:09,535 INFO L87 Difference]: Start difference. First operand 859 states and 967 transitions. Second operand has 22 states, 22 states have (on average 5.7727272727272725) internal successors, (127), 21 states have internal predecessors, (127), 21 states have call successors, (46), 21 states have call predecessors, (46), 19 states have return successors, (44), 19 states have call predecessors, (44), 19 states have call successors, (44) [2022-03-20 15:56:10,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:56:10,041 INFO L93 Difference]: Finished difference Result 953 states and 1079 transitions. [2022-03-20 15:56:10,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-20 15:56:10,041 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.7727272727272725) internal successors, (127), 21 states have internal predecessors, (127), 21 states have call successors, (46), 21 states have call predecessors, (46), 19 states have return successors, (44), 19 states have call predecessors, (44), 19 states have call successors, (44) Word has length 292 [2022-03-20 15:56:10,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:56:10,045 INFO L225 Difference]: With dead ends: 953 [2022-03-20 15:56:10,046 INFO L226 Difference]: Without dead ends: 930 [2022-03-20 15:56:10,046 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 594 GetRequests, 543 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1159, Invalid=1597, Unknown=0, NotChecked=0, Total=2756 [2022-03-20 15:56:10,047 INFO L913 BasicCegarLoop]: 108 mSDtfsCounter, 195 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 15:56:10,047 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 433 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 15:56:10,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2022-03-20 15:56:10,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 929. [2022-03-20 15:56:10,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 627 states have (on average 1.0829346092503986) internal successors, (679), 647 states have internal predecessors, (679), 186 states have call successors, (186), 117 states have call predecessors, (186), 115 states have return successors, (183), 164 states have call predecessors, (183), 183 states have call successors, (183) [2022-03-20 15:56:10,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 1048 transitions. [2022-03-20 15:56:10,149 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 1048 transitions. Word has length 292 [2022-03-20 15:56:10,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:56:10,150 INFO L478 AbstractCegarLoop]: Abstraction has 929 states and 1048 transitions. [2022-03-20 15:56:10,150 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.7727272727272725) internal successors, (127), 21 states have internal predecessors, (127), 21 states have call successors, (46), 21 states have call predecessors, (46), 19 states have return successors, (44), 19 states have call predecessors, (44), 19 states have call successors, (44) [2022-03-20 15:56:10,150 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 1048 transitions. [2022-03-20 15:56:10,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2022-03-20 15:56:10,152 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:56:10,152 INFO L499 BasicCegarLoop]: trace histogram [46, 45, 45, 13, 12, 12, 12, 12, 12, 12, 12, 7, 7, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:56:10,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-20 15:56:10,363 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,SelfDestructingSolverStorable43 [2022-03-20 15:56:10,363 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:56:10,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:56:10,363 INFO L85 PathProgramCache]: Analyzing trace with hash 2036404950, now seen corresponding path program 41 times [2022-03-20 15:56:10,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:56:10,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [500360759] [2022-03-20 15:56:10,366 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 15:56:10,366 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-20 15:56:10,366 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 15:56:10,366 INFO L85 PathProgramCache]: Analyzing trace with hash 2036404950, now seen corresponding path program 42 times [2022-03-20 15:56:10,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:56:10,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554752698] [2022-03-20 15:56:10,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:56:10,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:56:10,372 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:56:10,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1166301158] [2022-03-20 15:56:10,373 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:56:10,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:56:10,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:56:10,377 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:56:10,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-20 15:56:10,756 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2022-03-20 15:56:10,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:56:10,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 669 conjuncts, 65 conjunts are in the unsatisfiable core [2022-03-20 15:56:10,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:56:11,603 INFO L134 CoverageAnalysis]: Checked inductivity of 4596 backedges. 1833 proven. 306 refuted. 0 times theorem prover too weak. 2457 trivial. 0 not checked. [2022-03-20 15:56:11,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:56:15,299 INFO L134 CoverageAnalysis]: Checked inductivity of 4596 backedges. 453 proven. 366 refuted. 0 times theorem prover too weak. 3777 trivial. 0 not checked. [2022-03-20 15:56:15,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:56:15,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554752698] [2022-03-20 15:56:15,300 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:56:15,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166301158] [2022-03-20 15:56:15,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166301158] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:56:15,300 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:56:15,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 33 [2022-03-20 15:56:15,300 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:56:15,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [500360759] [2022-03-20 15:56:15,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [500360759] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:56:15,300 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:56:15,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 15:56:15,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571561883] [2022-03-20 15:56:15,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:56:15,315 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 15:56:15,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:56:15,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 15:56:15,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=943, Unknown=0, NotChecked=0, Total=1056 [2022-03-20 15:56:15,316 INFO L87 Difference]: Start difference. First operand 929 states and 1048 transitions. Second operand has 19 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 17 states have internal predecessors, (67), 16 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (38), 16 states have call predecessors, (38), 16 states have call successors, (38) [2022-03-20 15:56:15,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:56:15,831 INFO L93 Difference]: Finished difference Result 1083 states and 1244 transitions. [2022-03-20 15:56:15,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 15:56:15,832 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 17 states have internal predecessors, (67), 16 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (38), 16 states have call predecessors, (38), 16 states have call successors, (38) Word has length 306 [2022-03-20 15:56:15,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:56:15,835 INFO L225 Difference]: With dead ends: 1083 [2022-03-20 15:56:15,835 INFO L226 Difference]: Without dead ends: 877 [2022-03-20 15:56:15,836 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 612 GetRequests, 577 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=118, Invalid=1004, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 15:56:15,836 INFO L913 BasicCegarLoop]: 80 mSDtfsCounter, 29 mSDsluCounter, 822 mSDsCounter, 0 mSdLazyCounter, 863 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 902 SdHoareTripleChecker+Invalid, 921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 15:56:15,836 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 902 Invalid, 921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 863 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 15:56:15,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2022-03-20 15:56:15,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 877. [2022-03-20 15:56:15,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 592 states have (on average 1.0810810810810811) internal successors, (640), 610 states have internal predecessors, (640), 174 states have call successors, (174), 112 states have call predecessors, (174), 110 states have return successors, (171), 154 states have call predecessors, (171), 171 states have call successors, (171) [2022-03-20 15:56:15,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 985 transitions. [2022-03-20 15:56:15,928 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 985 transitions. Word has length 306 [2022-03-20 15:56:15,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:56:15,929 INFO L478 AbstractCegarLoop]: Abstraction has 877 states and 985 transitions. [2022-03-20 15:56:15,929 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 17 states have internal predecessors, (67), 16 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (38), 16 states have call predecessors, (38), 16 states have call successors, (38) [2022-03-20 15:56:15,929 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 985 transitions. [2022-03-20 15:56:15,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2022-03-20 15:56:15,931 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:56:15,931 INFO L499 BasicCegarLoop]: trace histogram [47, 46, 46, 12, 11, 11, 11, 11, 11, 11, 11, 8, 8, 8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:56:15,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-20 15:56:16,150 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:56:16,150 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:56:16,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:56:16,151 INFO L85 PathProgramCache]: Analyzing trace with hash 249588560, now seen corresponding path program 43 times [2022-03-20 15:56:16,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:56:16,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [850927193] [2022-03-20 15:56:16,154 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 15:56:16,154 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-20 15:56:16,154 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 15:56:16,154 INFO L85 PathProgramCache]: Analyzing trace with hash 249588560, now seen corresponding path program 44 times [2022-03-20 15:56:16,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:56:16,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987255828] [2022-03-20 15:56:16,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:56:16,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:56:16,161 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:56:16,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1422512177] [2022-03-20 15:56:16,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:56:16,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:56:16,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:56:16,184 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:56:16,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-20 15:56:16,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:56:16,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:56:16,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 730 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-20 15:56:16,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:56:16,913 INFO L134 CoverageAnalysis]: Checked inductivity of 4752 backedges. 92 proven. 4520 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-03-20 15:56:16,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:56:17,553 INFO L134 CoverageAnalysis]: Checked inductivity of 4752 backedges. 92 proven. 520 refuted. 0 times theorem prover too weak. 4140 trivial. 0 not checked. [2022-03-20 15:56:17,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:56:17,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987255828] [2022-03-20 15:56:17,553 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:56:17,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422512177] [2022-03-20 15:56:17,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422512177] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:56:17,553 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:56:17,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 44 [2022-03-20 15:56:17,554 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:56:17,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [850927193] [2022-03-20 15:56:17,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [850927193] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:56:17,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:56:17,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-20 15:56:17,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802423978] [2022-03-20 15:56:17,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:56:17,554 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 15:56:17,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:56:17,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 15:56:17,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=866, Invalid=1026, Unknown=0, NotChecked=0, Total=1892 [2022-03-20 15:56:17,555 INFO L87 Difference]: Start difference. First operand 877 states and 985 transitions. Second operand has 23 states, 23 states have (on average 5.782608695652174) internal successors, (133), 22 states have internal predecessors, (133), 22 states have call successors, (49), 22 states have call predecessors, (49), 20 states have return successors, (47), 20 states have call predecessors, (47), 20 states have call successors, (47) [2022-03-20 15:56:18,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:56:18,007 INFO L93 Difference]: Finished difference Result 971 states and 1097 transitions. [2022-03-20 15:56:18,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-20 15:56:18,008 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.782608695652174) internal successors, (133), 22 states have internal predecessors, (133), 22 states have call successors, (49), 22 states have call predecessors, (49), 20 states have return successors, (47), 20 states have call predecessors, (47), 20 states have call successors, (47) Word has length 310 [2022-03-20 15:56:18,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:56:18,011 INFO L225 Difference]: With dead ends: 971 [2022-03-20 15:56:18,011 INFO L226 Difference]: Without dead ends: 948 [2022-03-20 15:56:18,012 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 630 GetRequests, 577 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1251, Invalid=1719, Unknown=0, NotChecked=0, Total=2970 [2022-03-20 15:56:18,012 INFO L913 BasicCegarLoop]: 111 mSDtfsCounter, 213 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 342 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 342 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 15:56:18,013 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 446 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [342 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 15:56:18,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 948 states. [2022-03-20 15:56:18,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 948 to 947. [2022-03-20 15:56:18,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 947 states, 639 states have (on average 1.081377151799687) internal successors, (691), 659 states have internal predecessors, (691), 189 states have call successors, (189), 120 states have call predecessors, (189), 118 states have return successors, (186), 167 states have call predecessors, (186), 186 states have call successors, (186) [2022-03-20 15:56:18,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 947 states to 947 states and 1066 transitions. [2022-03-20 15:56:18,117 INFO L78 Accepts]: Start accepts. Automaton has 947 states and 1066 transitions. Word has length 310 [2022-03-20 15:56:18,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:56:18,117 INFO L478 AbstractCegarLoop]: Abstraction has 947 states and 1066 transitions. [2022-03-20 15:56:18,117 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.782608695652174) internal successors, (133), 22 states have internal predecessors, (133), 22 states have call successors, (49), 22 states have call predecessors, (49), 20 states have return successors, (47), 20 states have call predecessors, (47), 20 states have call successors, (47) [2022-03-20 15:56:18,117 INFO L276 IsEmpty]: Start isEmpty. Operand 947 states and 1066 transitions. [2022-03-20 15:56:18,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2022-03-20 15:56:18,120 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:56:18,120 INFO L499 BasicCegarLoop]: trace histogram [49, 48, 48, 13, 12, 12, 12, 12, 12, 12, 12, 8, 8, 8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:56:18,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-20 15:56:18,335 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:56:18,336 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:56:18,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:56:18,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1363998972, now seen corresponding path program 45 times [2022-03-20 15:56:18,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:56:18,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1882356749] [2022-03-20 15:56:18,338 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 15:56:18,338 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-20 15:56:18,338 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 15:56:18,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1363998972, now seen corresponding path program 46 times [2022-03-20 15:56:18,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:56:18,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154466825] [2022-03-20 15:56:18,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:56:18,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:56:18,345 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:56:18,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [324917444] [2022-03-20 15:56:18,345 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:56:18,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:56:18,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:56:18,347 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:56:18,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-20 15:56:19,416 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:56:19,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:56:19,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 763 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-20 15:56:19,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:56:19,960 INFO L134 CoverageAnalysis]: Checked inductivity of 5196 backedges. 96 proven. 4956 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-03-20 15:56:19,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:56:20,901 INFO L134 CoverageAnalysis]: Checked inductivity of 5196 backedges. 96 proven. 588 refuted. 0 times theorem prover too weak. 4512 trivial. 0 not checked. [2022-03-20 15:56:20,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:56:20,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154466825] [2022-03-20 15:56:20,901 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:56:20,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324917444] [2022-03-20 15:56:20,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324917444] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:56:20,901 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:56:20,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2022-03-20 15:56:20,902 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:56:20,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1882356749] [2022-03-20 15:56:20,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1882356749] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:56:20,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:56:20,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-20 15:56:20,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189440636] [2022-03-20 15:56:20,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:56:20,902 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 15:56:20,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:56:20,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 15:56:20,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=951, Invalid=1119, Unknown=0, NotChecked=0, Total=2070 [2022-03-20 15:56:20,903 INFO L87 Difference]: Start difference. First operand 947 states and 1066 transitions. Second operand has 24 states, 24 states have (on average 5.833333333333333) internal successors, (140), 23 states have internal predecessors, (140), 23 states have call successors, (51), 23 states have call predecessors, (51), 21 states have return successors, (49), 21 states have call predecessors, (49), 21 states have call successors, (49) [2022-03-20 15:56:21,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:56:21,509 INFO L93 Difference]: Finished difference Result 1041 states and 1178 transitions. [2022-03-20 15:56:21,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-20 15:56:21,510 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.833333333333333) internal successors, (140), 23 states have internal predecessors, (140), 23 states have call successors, (51), 23 states have call predecessors, (51), 21 states have return successors, (49), 21 states have call predecessors, (49), 21 states have call successors, (49) Word has length 324 [2022-03-20 15:56:21,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:56:21,514 INFO L225 Difference]: With dead ends: 1041 [2022-03-20 15:56:21,514 INFO L226 Difference]: Without dead ends: 1018 [2022-03-20 15:56:21,515 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 659 GetRequests, 603 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1395, Invalid=1911, Unknown=0, NotChecked=0, Total=3306 [2022-03-20 15:56:21,515 INFO L913 BasicCegarLoop]: 116 mSDtfsCounter, 247 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 343 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 343 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 15:56:21,515 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 453 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [343 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 15:56:21,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1018 states. [2022-03-20 15:56:21,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1018 to 1017. [2022-03-20 15:56:21,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1017 states, 686 states have (on average 1.0816326530612246) internal successors, (742), 708 states have internal predecessors, (742), 204 states have call successors, (204), 128 states have call predecessors, (204), 126 states have return successors, (201), 180 states have call predecessors, (201), 201 states have call successors, (201) [2022-03-20 15:56:21,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1017 states to 1017 states and 1147 transitions. [2022-03-20 15:56:21,632 INFO L78 Accepts]: Start accepts. Automaton has 1017 states and 1147 transitions. Word has length 324 [2022-03-20 15:56:21,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:56:21,632 INFO L478 AbstractCegarLoop]: Abstraction has 1017 states and 1147 transitions. [2022-03-20 15:56:21,633 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.833333333333333) internal successors, (140), 23 states have internal predecessors, (140), 23 states have call successors, (51), 23 states have call predecessors, (51), 21 states have return successors, (49), 21 states have call predecessors, (49), 21 states have call successors, (49) [2022-03-20 15:56:21,633 INFO L276 IsEmpty]: Start isEmpty. Operand 1017 states and 1147 transitions. [2022-03-20 15:56:21,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2022-03-20 15:56:21,636 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:56:21,636 INFO L499 BasicCegarLoop]: trace histogram [51, 50, 50, 14, 13, 13, 13, 13, 13, 13, 13, 8, 8, 8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:56:21,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-03-20 15:56:21,841 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,SelfDestructingSolverStorable46 [2022-03-20 15:56:21,841 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:56:21,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:56:21,842 INFO L85 PathProgramCache]: Analyzing trace with hash 531245480, now seen corresponding path program 47 times [2022-03-20 15:56:21,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:56:21,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [324031621] [2022-03-20 15:56:21,844 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 15:56:21,844 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-20 15:56:21,845 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 15:56:21,845 INFO L85 PathProgramCache]: Analyzing trace with hash 531245480, now seen corresponding path program 48 times [2022-03-20 15:56:21,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:56:21,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132860997] [2022-03-20 15:56:21,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:56:21,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:56:21,852 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:56:21,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1396144653] [2022-03-20 15:56:21,852 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:56:21,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:56:21,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:56:21,868 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:56:21,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-20 15:56:22,317 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2022-03-20 15:56:22,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:56:22,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 796 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-20 15:56:22,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:56:23,009 INFO L134 CoverageAnalysis]: Checked inductivity of 5662 backedges. 100 proven. 5414 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-03-20 15:56:23,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:56:23,997 INFO L134 CoverageAnalysis]: Checked inductivity of 5662 backedges. 100 proven. 662 refuted. 0 times theorem prover too weak. 4900 trivial. 0 not checked. [2022-03-20 15:56:23,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:56:23,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132860997] [2022-03-20 15:56:23,998 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:56:23,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396144653] [2022-03-20 15:56:23,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396144653] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:56:23,998 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:56:23,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2022-03-20 15:56:23,998 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:56:23,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [324031621] [2022-03-20 15:56:23,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [324031621] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:56:23,998 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:56:23,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-20 15:56:23,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728341190] [2022-03-20 15:56:23,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:56:23,999 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-20 15:56:23,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:56:23,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-20 15:56:24,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1040, Invalid=1216, Unknown=0, NotChecked=0, Total=2256 [2022-03-20 15:56:24,000 INFO L87 Difference]: Start difference. First operand 1017 states and 1147 transitions. Second operand has 25 states, 25 states have (on average 5.88) internal successors, (147), 24 states have internal predecessors, (147), 24 states have call successors, (53), 24 states have call predecessors, (53), 22 states have return successors, (51), 22 states have call predecessors, (51), 22 states have call successors, (51) [2022-03-20 15:56:24,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:56:24,550 INFO L93 Difference]: Finished difference Result 1111 states and 1259 transitions. [2022-03-20 15:56:24,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-20 15:56:24,551 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.88) internal successors, (147), 24 states have internal predecessors, (147), 24 states have call successors, (53), 24 states have call predecessors, (53), 22 states have return successors, (51), 22 states have call predecessors, (51), 22 states have call successors, (51) Word has length 338 [2022-03-20 15:56:24,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:56:24,555 INFO L225 Difference]: With dead ends: 1111 [2022-03-20 15:56:24,555 INFO L226 Difference]: Without dead ends: 1088 [2022-03-20 15:56:24,556 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 688 GetRequests, 629 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1547, Invalid=2113, Unknown=0, NotChecked=0, Total=3660 [2022-03-20 15:56:24,556 INFO L913 BasicCegarLoop]: 121 mSDtfsCounter, 199 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 15:56:24,556 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 525 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 15:56:24,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1088 states. [2022-03-20 15:56:24,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1088 to 1087. [2022-03-20 15:56:24,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1087 states, 733 states have (on average 1.0818553888130968) internal successors, (793), 757 states have internal predecessors, (793), 219 states have call successors, (219), 136 states have call predecessors, (219), 134 states have return successors, (216), 193 states have call predecessors, (216), 216 states have call successors, (216) [2022-03-20 15:56:24,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1087 states to 1087 states and 1228 transitions. [2022-03-20 15:56:24,664 INFO L78 Accepts]: Start accepts. Automaton has 1087 states and 1228 transitions. Word has length 338 [2022-03-20 15:56:24,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:56:24,664 INFO L478 AbstractCegarLoop]: Abstraction has 1087 states and 1228 transitions. [2022-03-20 15:56:24,665 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.88) internal successors, (147), 24 states have internal predecessors, (147), 24 states have call successors, (53), 24 states have call predecessors, (53), 22 states have return successors, (51), 22 states have call predecessors, (51), 22 states have call successors, (51) [2022-03-20 15:56:24,665 INFO L276 IsEmpty]: Start isEmpty. Operand 1087 states and 1228 transitions. [2022-03-20 15:56:24,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2022-03-20 15:56:24,669 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:56:24,669 INFO L499 BasicCegarLoop]: trace histogram [53, 52, 52, 15, 14, 14, 14, 14, 14, 14, 14, 8, 8, 8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:56:24,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-03-20 15:56:24,876 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,SelfDestructingSolverStorable47 [2022-03-20 15:56:24,876 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:56:24,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:56:24,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1969308332, now seen corresponding path program 49 times [2022-03-20 15:56:24,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:56:24,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1752984265] [2022-03-20 15:56:24,879 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 15:56:24,879 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-20 15:56:24,879 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 15:56:24,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1969308332, now seen corresponding path program 50 times [2022-03-20 15:56:24,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:56:24,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295031622] [2022-03-20 15:56:24,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:56:24,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:56:24,886 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:56:24,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [83730557] [2022-03-20 15:56:24,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:56:24,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:56:24,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:56:24,888 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:56:24,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-20 15:56:25,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:56:25,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:56:25,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 829 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-20 15:56:25,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:56:25,483 INFO L134 CoverageAnalysis]: Checked inductivity of 6150 backedges. 104 proven. 5894 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2022-03-20 15:56:25,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:56:26,325 INFO L134 CoverageAnalysis]: Checked inductivity of 6150 backedges. 104 proven. 742 refuted. 0 times theorem prover too weak. 5304 trivial. 0 not checked. [2022-03-20 15:56:26,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:56:26,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295031622] [2022-03-20 15:56:26,325 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:56:26,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83730557] [2022-03-20 15:56:26,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83730557] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:56:26,326 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:56:26,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2022-03-20 15:56:26,326 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:56:26,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1752984265] [2022-03-20 15:56:26,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1752984265] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:56:26,326 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:56:26,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-20 15:56:26,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214919848] [2022-03-20 15:56:26,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:56:26,326 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-20 15:56:26,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:56:26,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-20 15:56:26,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2022-03-20 15:56:26,328 INFO L87 Difference]: Start difference. First operand 1087 states and 1228 transitions. Second operand has 26 states, 26 states have (on average 5.923076923076923) internal successors, (154), 25 states have internal predecessors, (154), 25 states have call successors, (55), 25 states have call predecessors, (55), 23 states have return successors, (53), 23 states have call predecessors, (53), 23 states have call successors, (53) [2022-03-20 15:56:26,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:56:26,815 INFO L93 Difference]: Finished difference Result 1181 states and 1340 transitions. [2022-03-20 15:56:26,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-20 15:56:26,815 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.923076923076923) internal successors, (154), 25 states have internal predecessors, (154), 25 states have call successors, (55), 25 states have call predecessors, (55), 23 states have return successors, (53), 23 states have call predecessors, (53), 23 states have call successors, (53) Word has length 352 [2022-03-20 15:56:26,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:56:26,833 INFO L225 Difference]: With dead ends: 1181 [2022-03-20 15:56:26,834 INFO L226 Difference]: Without dead ends: 1158 [2022-03-20 15:56:26,834 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 717 GetRequests, 655 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1707, Invalid=2325, Unknown=0, NotChecked=0, Total=4032 [2022-03-20 15:56:26,834 INFO L913 BasicCegarLoop]: 126 mSDtfsCounter, 247 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 15:56:26,835 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 491 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 15:56:26,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1158 states. [2022-03-20 15:56:26,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1158 to 1157. [2022-03-20 15:56:26,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1157 states, 780 states have (on average 1.082051282051282) internal successors, (844), 806 states have internal predecessors, (844), 234 states have call successors, (234), 144 states have call predecessors, (234), 142 states have return successors, (231), 206 states have call predecessors, (231), 231 states have call successors, (231) [2022-03-20 15:56:26,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1157 states to 1157 states and 1309 transitions. [2022-03-20 15:56:26,967 INFO L78 Accepts]: Start accepts. Automaton has 1157 states and 1309 transitions. Word has length 352 [2022-03-20 15:56:26,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:56:26,967 INFO L478 AbstractCegarLoop]: Abstraction has 1157 states and 1309 transitions. [2022-03-20 15:56:26,967 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.923076923076923) internal successors, (154), 25 states have internal predecessors, (154), 25 states have call successors, (55), 25 states have call predecessors, (55), 23 states have return successors, (53), 23 states have call predecessors, (53), 23 states have call successors, (53) [2022-03-20 15:56:26,968 INFO L276 IsEmpty]: Start isEmpty. Operand 1157 states and 1309 transitions. [2022-03-20 15:56:26,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2022-03-20 15:56:26,970 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:56:26,970 INFO L499 BasicCegarLoop]: trace histogram [55, 54, 54, 16, 15, 15, 15, 15, 15, 15, 15, 8, 8, 8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:56:26,988 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-03-20 15:56:27,181 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,SelfDestructingSolverStorable48 [2022-03-20 15:56:27,181 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:56:27,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:56:27,181 INFO L85 PathProgramCache]: Analyzing trace with hash 402748416, now seen corresponding path program 51 times [2022-03-20 15:56:27,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:56:27,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1330580823] [2022-03-20 15:56:27,193 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 15:56:27,193 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-20 15:56:27,193 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 15:56:27,194 INFO L85 PathProgramCache]: Analyzing trace with hash 402748416, now seen corresponding path program 52 times [2022-03-20 15:56:27,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:56:27,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442579906] [2022-03-20 15:56:27,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:56:27,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:56:27,203 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:56:27,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1560694586] [2022-03-20 15:56:27,203 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:56:27,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:56:27,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:56:27,204 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:56:27,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process