/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench/egcd-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 21:13:35,304 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 21:13:35,306 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 21:13:35,348 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 21:13:35,389 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 21:13:35,390 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 21:13:35,391 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 21:13:35,392 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-04-06 21:13:35,400 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 21:13:35,400 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 21:13:35,401 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 21:13:35,401 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 21:13:35,401 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 21:13:35,402 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 21:13:35,402 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 21:13:35,402 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 21:13:35,402 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 21:13:35,402 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 21:13:35,402 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 21:13:35,402 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 21:13:35,403 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 21:13:35,403 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 21:13:35,403 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 21:13:35,403 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 21:13:35,403 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 21:13:35,403 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 21:13:35,404 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 21:13:35,404 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 21:13:35,404 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 21:13:35,404 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-06 21:13:35,404 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 21:13:35,638 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 21:13:35,667 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 21:13:35,669 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 21:13:35,670 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 21:13:35,670 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 21:13:35,671 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/egcd-ll.c [2022-04-06 21:13:35,726 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8cbdeb46d/b057392c091d430d829ce6fcdec44ec8/FLAG36459f802 [2022-04-06 21:13:36,092 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 21:13:36,093 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/egcd-ll.c [2022-04-06 21:13:36,098 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8cbdeb46d/b057392c091d430d829ce6fcdec44ec8/FLAG36459f802 [2022-04-06 21:13:36,108 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8cbdeb46d/b057392c091d430d829ce6fcdec44ec8 [2022-04-06 21:13:36,110 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 21:13:36,111 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 21:13:36,112 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 21:13:36,112 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 21:13:36,117 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 21:13:36,118 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 09:13:36" (1/1) ... [2022-04-06 21:13:36,119 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2dfd638 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:13:36, skipping insertion in model container [2022-04-06 21:13:36,119 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 09:13:36" (1/1) ... [2022-04-06 21:13:36,125 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 21:13:36,138 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 21:13:36,281 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/egcd-ll.c[489,502] [2022-04-06 21:13:36,297 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 21:13:36,303 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 21:13:36,311 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/egcd-ll.c[489,502] [2022-04-06 21:13:36,316 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 21:13:36,326 INFO L208 MainTranslator]: Completed translation [2022-04-06 21:13:36,327 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:13:36 WrapperNode [2022-04-06 21:13:36,327 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 21:13:36,328 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 21:13:36,328 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 21:13:36,328 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 21:13:36,337 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:13:36" (1/1) ... [2022-04-06 21:13:36,337 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:13:36" (1/1) ... [2022-04-06 21:13:36,344 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:13:36" (1/1) ... [2022-04-06 21:13:36,344 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:13:36" (1/1) ... [2022-04-06 21:13:36,357 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:13:36" (1/1) ... [2022-04-06 21:13:36,362 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:13:36" (1/1) ... [2022-04-06 21:13:36,369 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:13:36" (1/1) ... [2022-04-06 21:13:36,370 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 21:13:36,371 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 21:13:36,371 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 21:13:36,371 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 21:13:36,372 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:13:36" (1/1) ... [2022-04-06 21:13:36,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 21:13:36,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:13:36,404 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-06 21:13:36,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-06 21:13:36,444 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 21:13:36,444 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 21:13:36,444 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 21:13:36,444 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 21:13:36,445 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 21:13:36,445 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 21:13:36,445 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 21:13:36,445 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 21:13:36,445 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 21:13:36,445 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 21:13:36,445 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 21:13:36,445 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 21:13:36,445 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 21:13:36,445 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 21:13:36,446 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 21:13:36,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 21:13:36,446 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 21:13:36,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 21:13:36,446 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 21:13:36,446 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 21:13:36,497 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 21:13:36,498 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 21:13:36,645 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 21:13:36,651 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 21:13:36,651 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-06 21:13:36,653 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 09:13:36 BoogieIcfgContainer [2022-04-06 21:13:36,653 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 21:13:36,656 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 21:13:36,656 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 21:13:36,661 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 21:13:36,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 09:13:36" (1/3) ... [2022-04-06 21:13:36,662 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6eab8ecc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 09:13:36, skipping insertion in model container [2022-04-06 21:13:36,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:13:36" (2/3) ... [2022-04-06 21:13:36,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6eab8ecc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 09:13:36, skipping insertion in model container [2022-04-06 21:13:36,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 09:13:36" (3/3) ... [2022-04-06 21:13:36,664 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll.c [2022-04-06 21:13:36,668 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 21:13:36,668 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 21:13:36,715 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 21:13:36,725 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 21:13:36,725 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 21:13:36,741 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 21:13:36,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-06 21:13:36,757 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:13:36,758 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:13:36,759 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:13:36,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:13:36,764 INFO L85 PathProgramCache]: Analyzing trace with hash -2012836591, now seen corresponding path program 1 times [2022-04-06 21:13:36,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:13:36,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [599764429] [2022-04-06 21:13:36,781 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:13:36,781 INFO L85 PathProgramCache]: Analyzing trace with hash -2012836591, now seen corresponding path program 2 times [2022-04-06 21:13:36,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:13:36,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124778408] [2022-04-06 21:13:36,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:13:36,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:13:36,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:13:36,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:13:36,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:13:36,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 21:13:36,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:13:36,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 21:13:36,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:13:36,981 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:13:36,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:13:36,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124778408] [2022-04-06 21:13:36,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124778408] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:13:36,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:13:36,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 21:13:36,985 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:13:36,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [599764429] [2022-04-06 21:13:36,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [599764429] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:13:36,986 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:13:36,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 21:13:36,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802839385] [2022-04-06 21:13:36,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:13:36,990 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 21:13:36,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:13:37,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 21:13:37,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 21:13:37,011 INFO L87 Difference]: Start difference. First operand has 34 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:13:37,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:13:37,109 INFO L93 Difference]: Finished difference Result 61 states and 93 transitions. [2022-04-06 21:13:37,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 21:13:37,111 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-04-06 21:13:37,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:13:37,117 INFO L225 Difference]: With dead ends: 61 [2022-04-06 21:13:37,117 INFO L226 Difference]: Without dead ends: 29 [2022-04-06 21:13:37,119 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 21:13:37,123 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 17 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:13:37,124 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 36 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:13:37,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-04-06 21:13:37,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-04-06 21:13:37,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-06 21:13:37,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2022-04-06 21:13:37,153 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 22 [2022-04-06 21:13:37,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:13:37,154 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2022-04-06 21:13:37,154 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:13:37,154 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2022-04-06 21:13:37,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-06 21:13:37,155 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:13:37,155 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:13:37,156 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 21:13:37,156 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:13:37,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:13:37,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1952740121, now seen corresponding path program 1 times [2022-04-06 21:13:37,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:13:37,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [264932165] [2022-04-06 21:13:37,158 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:13:37,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1952740121, now seen corresponding path program 2 times [2022-04-06 21:13:37,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:13:37,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953278690] [2022-04-06 21:13:37,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:13:37,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:13:37,175 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:13:37,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2046377110] [2022-04-06 21:13:37,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:13:37,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:13:37,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:13:37,178 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:13:37,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 21:13:37,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-06 21:13:37,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:13:37,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 21:13:37,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:13:37,420 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:13:37,420 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 21:13:37,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:13:37,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953278690] [2022-04-06 21:13:37,421 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:13:37,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046377110] [2022-04-06 21:13:37,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046377110] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:13:37,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:13:37,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 21:13:37,422 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:13:37,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [264932165] [2022-04-06 21:13:37,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [264932165] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:13:37,423 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:13:37,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 21:13:37,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895026745] [2022-04-06 21:13:37,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:13:37,424 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 21:13:37,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:13:37,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 21:13:37,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 21:13:37,425 INFO L87 Difference]: Start difference. First operand 29 states and 37 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), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 21:13:37,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:13:37,507 INFO L93 Difference]: Finished difference Result 45 states and 60 transitions. [2022-04-06 21:13:37,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 21:13:37,507 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), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2022-04-06 21:13:37,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:13:37,509 INFO L225 Difference]: With dead ends: 45 [2022-04-06 21:13:37,509 INFO L226 Difference]: Without dead ends: 43 [2022-04-06 21:13:37,509 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 [2022-04-06 21:13:37,510 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 7 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:13:37,511 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 123 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:13:37,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-04-06 21:13:37,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2022-04-06 21:13:37,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 20 states have (on average 1.25) internal successors, (25), 22 states have internal predecessors, (25), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-04-06 21:13:37,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 57 transitions. [2022-04-06 21:13:37,523 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 57 transitions. Word has length 22 [2022-04-06 21:13:37,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:13:37,524 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 57 transitions. [2022-04-06 21:13:37,524 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), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 21:13:37,524 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 57 transitions. [2022-04-06 21:13:37,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-06 21:13:37,525 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:13:37,525 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:13:37,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 21:13:37,743 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:13:37,744 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:13:37,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:13:37,744 INFO L85 PathProgramCache]: Analyzing trace with hash 652987931, now seen corresponding path program 1 times [2022-04-06 21:13:37,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:13:37,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2021387480] [2022-04-06 21:13:37,745 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:13:37,745 INFO L85 PathProgramCache]: Analyzing trace with hash 652987931, now seen corresponding path program 2 times [2022-04-06 21:13:37,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:13:37,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152593908] [2022-04-06 21:13:37,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:13:37,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:13:37,766 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:13:37,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [360890415] [2022-04-06 21:13:37,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:13:37,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:13:37,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:13:37,774 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:13:37,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 21:13:37,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:13:37,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:13:37,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 21:13:37,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:13:37,983 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 21:13:37,983 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 21:13:37,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:13:37,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152593908] [2022-04-06 21:13:37,984 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:13:37,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360890415] [2022-04-06 21:13:37,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360890415] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:13:37,984 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:13:37,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 21:13:37,985 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:13:37,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2021387480] [2022-04-06 21:13:37,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2021387480] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:13:37,985 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:13:37,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 21:13:37,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590412936] [2022-04-06 21:13:37,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:13:37,988 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 21:13:37,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:13:37,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 21:13:37,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-04-06 21:13:37,989 INFO L87 Difference]: Start difference. First operand 42 states and 57 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 21:13:38,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:13:38,121 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2022-04-06 21:13:38,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 21:13:38,122 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2022-04-06 21:13:38,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:13:38,123 INFO L225 Difference]: With dead ends: 49 [2022-04-06 21:13:38,123 INFO L226 Difference]: Without dead ends: 47 [2022-04-06 21:13:38,124 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-04-06 21:13:38,125 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 20 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:13:38,125 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 148 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:13:38,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-04-06 21:13:38,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2022-04-06 21:13:38,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 25 states have internal predecessors, (28), 17 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-04-06 21:13:38,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2022-04-06 21:13:38,137 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 27 [2022-04-06 21:13:38,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:13:38,137 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2022-04-06 21:13:38,137 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 21:13:38,137 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2022-04-06 21:13:38,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-06 21:13:38,138 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:13:38,138 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:13:38,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 21:13:38,359 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-04-06 21:13:38,360 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:13:38,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:13:38,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1028398105, now seen corresponding path program 1 times [2022-04-06 21:13:38,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:13:38,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1308837132] [2022-04-06 21:13:38,361 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:13:38,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1028398105, now seen corresponding path program 2 times [2022-04-06 21:13:38,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:13:38,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651864092] [2022-04-06 21:13:38,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:13:38,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:13:38,373 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:13:38,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1502193929] [2022-04-06 21:13:38,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:13:38,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:13:38,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:13:38,375 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:13:38,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 21:13:38,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:13:38,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:13:38,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 21:13:38,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:13:38,557 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-04-06 21:13:38,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:13:38,680 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-06 21:13:38,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:13:38,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651864092] [2022-04-06 21:13:38,681 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:13:38,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502193929] [2022-04-06 21:13:38,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502193929] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 21:13:38,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 21:13:38,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2022-04-06 21:13:38,684 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:13:38,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1308837132] [2022-04-06 21:13:38,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1308837132] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:13:38,692 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:13:38,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 21:13:38,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008551851] [2022-04-06 21:13:38,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:13:38,693 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 21:13:38,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:13:38,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 21:13:38,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-04-06 21:13:38,694 INFO L87 Difference]: Start difference. First operand 46 states and 60 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 21:13:38,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:13:38,760 INFO L93 Difference]: Finished difference Result 71 states and 100 transitions. [2022-04-06 21:13:38,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 21:13:38,761 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2022-04-06 21:13:38,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:13:38,768 INFO L225 Difference]: With dead ends: 71 [2022-04-06 21:13:38,768 INFO L226 Difference]: Without dead ends: 67 [2022-04-06 21:13:38,770 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-04-06 21:13:38,774 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 8 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:13:38,775 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 120 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:13:38,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-04-06 21:13:38,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-04-06 21:13:38,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 32 states have (on average 1.28125) internal successors, (41), 36 states have internal predecessors, (41), 28 states have call successors, (28), 7 states have call predecessors, (28), 6 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-04-06 21:13:38,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 93 transitions. [2022-04-06 21:13:38,801 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 93 transitions. Word has length 32 [2022-04-06 21:13:38,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:13:38,801 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 93 transitions. [2022-04-06 21:13:38,801 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 21:13:38,801 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 93 transitions. [2022-04-06 21:13:38,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-06 21:13:38,802 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:13:38,802 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:13:38,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 21:13:39,023 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:13:39,024 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:13:39,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:13:39,024 INFO L85 PathProgramCache]: Analyzing trace with hash -134474469, now seen corresponding path program 1 times [2022-04-06 21:13:39,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:13:39,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1702037579] [2022-04-06 21:13:39,025 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:13:39,025 INFO L85 PathProgramCache]: Analyzing trace with hash -134474469, now seen corresponding path program 2 times [2022-04-06 21:13:39,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:13:39,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287026980] [2022-04-06 21:13:39,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:13:39,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:13:39,037 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:13:39,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [100154446] [2022-04-06 21:13:39,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:13:39,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:13:39,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:13:39,050 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:13:39,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 21:13:39,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:13:39,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:13:39,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 21:13:39,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:13:39,148 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 21:13:39,148 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 21:13:39,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:13:39,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287026980] [2022-04-06 21:13:39,148 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:13:39,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100154446] [2022-04-06 21:13:39,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100154446] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:13:39,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:13:39,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 21:13:39,149 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:13:39,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1702037579] [2022-04-06 21:13:39,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1702037579] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:13:39,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:13:39,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 21:13:39,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802304397] [2022-04-06 21:13:39,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:13:39,150 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 21:13:39,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:13:39,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 21:13:39,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 21:13:39,151 INFO L87 Difference]: Start difference. First operand 67 states and 93 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-04-06 21:13:39,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:13:39,189 INFO L93 Difference]: Finished difference Result 73 states and 98 transitions. [2022-04-06 21:13:39,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 21:13:39,189 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 38 [2022-04-06 21:13:39,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:13:39,190 INFO L225 Difference]: With dead ends: 73 [2022-04-06 21:13:39,191 INFO L226 Difference]: Without dead ends: 71 [2022-04-06 21:13:39,191 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 21:13:39,192 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 5 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:13:39,192 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 119 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:13:39,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-04-06 21:13:39,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-04-06 21:13:39,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 39 states have internal predecessors, (44), 28 states have call successors, (28), 8 states have call predecessors, (28), 7 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-04-06 21:13:39,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 96 transitions. [2022-04-06 21:13:39,205 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 96 transitions. Word has length 38 [2022-04-06 21:13:39,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:13:39,205 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 96 transitions. [2022-04-06 21:13:39,205 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-04-06 21:13:39,206 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 96 transitions. [2022-04-06 21:13:39,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-04-06 21:13:39,206 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:13:39,207 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:13:39,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 21:13:39,431 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:13:39,432 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:13:39,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:13:39,432 INFO L85 PathProgramCache]: Analyzing trace with hash 251096952, now seen corresponding path program 1 times [2022-04-06 21:13:39,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:13:39,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1937773759] [2022-04-06 21:13:39,433 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:13:39,433 INFO L85 PathProgramCache]: Analyzing trace with hash 251096952, now seen corresponding path program 2 times [2022-04-06 21:13:39,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:13:39,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788561303] [2022-04-06 21:13:39,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:13:39,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:13:39,446 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:13:39,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [6814854] [2022-04-06 21:13:39,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:13:39,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:13:39,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:13:39,451 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:13:39,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 21:13:39,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:13:39,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:13:39,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 21:13:39,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:13:39,653 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-04-06 21:13:39,653 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 21:13:39,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:13:39,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788561303] [2022-04-06 21:13:39,655 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:13:39,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6814854] [2022-04-06 21:13:39,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6814854] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:13:39,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:13:39,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 21:13:39,656 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:13:39,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1937773759] [2022-04-06 21:13:39,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1937773759] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:13:39,660 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:13:39,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 21:13:39,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122963932] [2022-04-06 21:13:39,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:13:39,660 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 21:13:39,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:13:39,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 21:13:39,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 21:13:39,661 INFO L87 Difference]: Start difference. First operand 71 states and 96 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-06 21:13:39,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:13:39,709 INFO L93 Difference]: Finished difference Result 81 states and 104 transitions. [2022-04-06 21:13:39,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 21:13:39,709 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 40 [2022-04-06 21:13:39,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:13:39,710 INFO L225 Difference]: With dead ends: 81 [2022-04-06 21:13:39,711 INFO L226 Difference]: Without dead ends: 78 [2022-04-06 21:13:39,711 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 21:13:39,712 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 6 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:13:39,712 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 124 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:13:39,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-04-06 21:13:39,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2022-04-06 21:13:39,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 44 states have internal predecessors, (50), 25 states have call successors, (25), 10 states have call predecessors, (25), 9 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2022-04-06 21:13:39,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 97 transitions. [2022-04-06 21:13:39,725 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 97 transitions. Word has length 40 [2022-04-06 21:13:39,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:13:39,725 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 97 transitions. [2022-04-06 21:13:39,725 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-06 21:13:39,726 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 97 transitions. [2022-04-06 21:13:39,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-06 21:13:39,726 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:13:39,727 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:13:39,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 21:13:39,939 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:13:39,940 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:13:39,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:13:39,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1098226535, now seen corresponding path program 1 times [2022-04-06 21:13:39,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:13:39,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1578760766] [2022-04-06 21:13:39,941 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:13:39,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1098226535, now seen corresponding path program 2 times [2022-04-06 21:13:39,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:13:39,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814034615] [2022-04-06 21:13:39,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:13:39,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:13:39,955 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:13:39,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1711344725] [2022-04-06 21:13:39,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:13:39,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:13:39,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:13:39,958 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:13:39,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 21:13:40,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:13:40,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:13:40,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 21:13:40,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:13:40,113 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-04-06 21:13:40,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:13:40,240 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-04-06 21:13:40,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:13:40,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814034615] [2022-04-06 21:13:40,241 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:13:40,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711344725] [2022-04-06 21:13:40,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711344725] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:13:40,241 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:13:40,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-04-06 21:13:40,241 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:13:40,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1578760766] [2022-04-06 21:13:40,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1578760766] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:13:40,242 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:13:40,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 21:13:40,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916984234] [2022-04-06 21:13:40,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:13:40,242 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 21:13:40,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:13:40,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 21:13:40,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-04-06 21:13:40,243 INFO L87 Difference]: Start difference. First operand 76 states and 97 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-04-06 21:13:40,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:13:40,369 INFO L93 Difference]: Finished difference Result 85 states and 107 transitions. [2022-04-06 21:13:40,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 21:13:40,370 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 43 [2022-04-06 21:13:40,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:13:40,371 INFO L225 Difference]: With dead ends: 85 [2022-04-06 21:13:40,371 INFO L226 Difference]: Without dead ends: 81 [2022-04-06 21:13:40,372 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-04-06 21:13:40,372 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 13 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:13:40,372 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 121 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:13:40,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-04-06 21:13:40,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-04-06 21:13:40,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 48 states have internal predecessors, (52), 25 states have call successors, (25), 11 states have call predecessors, (25), 10 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2022-04-06 21:13:40,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 100 transitions. [2022-04-06 21:13:40,386 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 100 transitions. Word has length 43 [2022-04-06 21:13:40,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:13:40,387 INFO L478 AbstractCegarLoop]: Abstraction has 81 states and 100 transitions. [2022-04-06 21:13:40,387 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-04-06 21:13:40,387 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 100 transitions. [2022-04-06 21:13:40,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-06 21:13:40,388 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:13:40,388 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:13:40,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 21:13:40,610 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:13:40,611 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:13:40,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:13:40,612 INFO L85 PathProgramCache]: Analyzing trace with hash -17648356, now seen corresponding path program 3 times [2022-04-06 21:13:40,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:13:40,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1656804050] [2022-04-06 21:13:40,612 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:13:40,613 INFO L85 PathProgramCache]: Analyzing trace with hash -17648356, now seen corresponding path program 4 times [2022-04-06 21:13:40,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:13:40,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57477187] [2022-04-06 21:13:40,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:13:40,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:13:40,622 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:13:40,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1003187608] [2022-04-06 21:13:40,622 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:13:40,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:13:40,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:13:40,623 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:13:40,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 21:13:40,660 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:13:40,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:13:40,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 30 conjunts are in the unsatisfiable core [2022-04-06 21:13:40,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:13:40,971 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 21:13:40,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:13:41,220 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-04-06 21:13:41,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:13:41,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57477187] [2022-04-06 21:13:41,221 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:13:41,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003187608] [2022-04-06 21:13:41,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003187608] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:13:41,221 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:13:41,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2022-04-06 21:13:41,222 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:13:41,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1656804050] [2022-04-06 21:13:41,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1656804050] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:13:41,222 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:13:41,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 21:13:41,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969085154] [2022-04-06 21:13:41,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:13:41,224 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 21:13:41,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:13:41,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 21:13:41,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-04-06 21:13:41,224 INFO L87 Difference]: Start difference. First operand 81 states and 100 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-04-06 21:13:41,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:13:41,515 INFO L93 Difference]: Finished difference Result 115 states and 142 transitions. [2022-04-06 21:13:41,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 21:13:41,515 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2022-04-06 21:13:41,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:13:41,521 INFO L225 Difference]: With dead ends: 115 [2022-04-06 21:13:41,521 INFO L226 Difference]: Without dead ends: 113 [2022-04-06 21:13:41,522 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2022-04-06 21:13:41,522 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 25 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 21:13:41,523 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 142 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 21:13:41,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-04-06 21:13:41,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 109. [2022-04-06 21:13:41,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 63 states have (on average 1.1587301587301588) internal successors, (73), 66 states have internal predecessors, (73), 31 states have call successors, (31), 15 states have call predecessors, (31), 14 states have return successors, (29), 27 states have call predecessors, (29), 29 states have call successors, (29) [2022-04-06 21:13:41,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 133 transitions. [2022-04-06 21:13:41,552 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 133 transitions. Word has length 45 [2022-04-06 21:13:41,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:13:41,552 INFO L478 AbstractCegarLoop]: Abstraction has 109 states and 133 transitions. [2022-04-06 21:13:41,552 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-04-06 21:13:41,553 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 133 transitions. [2022-04-06 21:13:41,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 21:13:41,557 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:13:41,558 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:13:41,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 21:13:41,777 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:13:41,777 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:13:41,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:13:41,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1834363254, now seen corresponding path program 1 times [2022-04-06 21:13:41,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:13:41,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [671743073] [2022-04-06 21:13:41,778 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:13:41,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1834363254, now seen corresponding path program 2 times [2022-04-06 21:13:41,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:13:41,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156069029] [2022-04-06 21:13:41,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:13:41,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:13:41,787 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:13:41,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1138678682] [2022-04-06 21:13:41,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:13:41,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:13:41,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:13:41,789 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:13:41,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 21:13:41,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:13:41,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:13:41,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 21:13:41,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:13:42,118 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-04-06 21:13:42,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:13:42,264 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-04-06 21:13:42,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:13:42,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156069029] [2022-04-06 21:13:42,265 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:13:42,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138678682] [2022-04-06 21:13:42,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138678682] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:13:42,265 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:13:42,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 11 [2022-04-06 21:13:42,268 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:13:42,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [671743073] [2022-04-06 21:13:42,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [671743073] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:13:42,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:13:42,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 21:13:42,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181840368] [2022-04-06 21:13:42,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:13:42,268 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 21:13:42,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:13:42,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 21:13:42,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-04-06 21:13:42,270 INFO L87 Difference]: Start difference. First operand 109 states and 133 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-04-06 21:13:42,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:13:42,436 INFO L93 Difference]: Finished difference Result 134 states and 173 transitions. [2022-04-06 21:13:42,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 21:13:42,436 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 50 [2022-04-06 21:13:42,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:13:42,438 INFO L225 Difference]: With dead ends: 134 [2022-04-06 21:13:42,438 INFO L226 Difference]: Without dead ends: 128 [2022-04-06 21:13:42,438 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-04-06 21:13:42,439 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 19 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:13:42,439 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 146 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:13:42,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-04-06 21:13:42,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2022-04-06 21:13:42,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 76 states have internal predecessors, (85), 40 states have call successors, (40), 16 states have call predecessors, (40), 15 states have return successors, (37), 35 states have call predecessors, (37), 37 states have call successors, (37) [2022-04-06 21:13:42,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 162 transitions. [2022-04-06 21:13:42,456 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 162 transitions. Word has length 50 [2022-04-06 21:13:42,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:13:42,456 INFO L478 AbstractCegarLoop]: Abstraction has 128 states and 162 transitions. [2022-04-06 21:13:42,456 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-04-06 21:13:42,457 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 162 transitions. [2022-04-06 21:13:42,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-06 21:13:42,457 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:13:42,457 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:13:42,482 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-04-06 21:13:42,671 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-04-06 21:13:42,671 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:13:42,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:13:42,672 INFO L85 PathProgramCache]: Analyzing trace with hash -152607915, now seen corresponding path program 1 times [2022-04-06 21:13:42,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:13:42,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1862891331] [2022-04-06 21:13:42,672 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:13:42,673 INFO L85 PathProgramCache]: Analyzing trace with hash -152607915, now seen corresponding path program 2 times [2022-04-06 21:13:42,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:13:42,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459155164] [2022-04-06 21:13:42,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:13:42,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:13:42,680 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:13:42,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [365778587] [2022-04-06 21:13:42,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:13:42,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:13:42,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:13:42,681 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:13:42,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 21:13:42,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:13:42,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:13:42,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 21:13:42,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:13:42,953 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-06 21:13:42,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:13:43,081 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-04-06 21:13:43,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:13:43,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459155164] [2022-04-06 21:13:43,082 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:13:43,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365778587] [2022-04-06 21:13:43,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365778587] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 21:13:43,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 21:13:43,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2022-04-06 21:13:43,082 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:13:43,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1862891331] [2022-04-06 21:13:43,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1862891331] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:13:43,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:13:43,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 21:13:43,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775566697] [2022-04-06 21:13:43,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:13:43,083 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 21:13:43,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:13:43,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 21:13:43,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-04-06 21:13:43,084 INFO L87 Difference]: Start difference. First operand 128 states and 162 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-06 21:13:43,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:13:43,136 INFO L93 Difference]: Finished difference Result 134 states and 167 transitions. [2022-04-06 21:13:43,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 21:13:43,137 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 58 [2022-04-06 21:13:43,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:13:43,139 INFO L225 Difference]: With dead ends: 134 [2022-04-06 21:13:43,139 INFO L226 Difference]: Without dead ends: 129 [2022-04-06 21:13:43,139 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 106 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-04-06 21:13:43,140 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:13:43,140 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 96 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:13:43,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-04-06 21:13:43,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2022-04-06 21:13:43,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 75 states have (on average 1.16) internal successors, (87), 78 states have internal predecessors, (87), 37 states have call successors, (37), 17 states have call predecessors, (37), 16 states have return successors, (35), 33 states have call predecessors, (35), 35 states have call successors, (35) [2022-04-06 21:13:43,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 159 transitions. [2022-04-06 21:13:43,164 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 159 transitions. Word has length 58 [2022-04-06 21:13:43,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:13:43,164 INFO L478 AbstractCegarLoop]: Abstraction has 129 states and 159 transitions. [2022-04-06 21:13:43,164 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-06 21:13:43,164 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 159 transitions. [2022-04-06 21:13:43,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-06 21:13:43,166 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:13:43,166 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:13:43,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 21:13:43,388 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-04-06 21:13:43,388 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:13:43,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:13:43,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1386725923, now seen corresponding path program 5 times [2022-04-06 21:13:43,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:13:43,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1198749737] [2022-04-06 21:13:43,389 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:13:43,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1386725923, now seen corresponding path program 6 times [2022-04-06 21:13:43,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:13:43,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559633600] [2022-04-06 21:13:43,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:13:43,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:13:43,398 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:13:43,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1453943916] [2022-04-06 21:13:43,398 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:13:43,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:13:43,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:13:43,399 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:13:43,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 21:13:43,467 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 21:13:43,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:13:43,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-06 21:13:43,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:13:43,861 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 17 proven. 12 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-04-06 21:13:43,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:13:44,016 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 14 proven. 12 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-04-06 21:13:44,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:13:44,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559633600] [2022-04-06 21:13:44,016 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:13:44,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453943916] [2022-04-06 21:13:44,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453943916] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:13:44,017 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:13:44,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 13 [2022-04-06 21:13:44,017 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:13:44,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1198749737] [2022-04-06 21:13:44,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1198749737] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:13:44,017 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:13:44,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 21:13:44,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211203731] [2022-04-06 21:13:44,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:13:44,018 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 21:13:44,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:13:44,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 21:13:44,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-04-06 21:13:44,019 INFO L87 Difference]: Start difference. First operand 129 states and 159 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-04-06 21:13:44,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:13:44,263 INFO L93 Difference]: Finished difference Result 163 states and 201 transitions. [2022-04-06 21:13:44,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 21:13:44,264 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 63 [2022-04-06 21:13:44,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:13:44,265 INFO L225 Difference]: With dead ends: 163 [2022-04-06 21:13:44,265 INFO L226 Difference]: Without dead ends: 161 [2022-04-06 21:13:44,266 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-04-06 21:13:44,266 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 20 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 21:13:44,266 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 194 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 21:13:44,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-04-06 21:13:44,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 147. [2022-04-06 21:13:44,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 87 states have (on average 1.1494252873563218) internal successors, (100), 90 states have internal predecessors, (100), 40 states have call successors, (40), 20 states have call predecessors, (40), 19 states have return successors, (38), 36 states have call predecessors, (38), 38 states have call successors, (38) [2022-04-06 21:13:44,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 178 transitions. [2022-04-06 21:13:44,284 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 178 transitions. Word has length 63 [2022-04-06 21:13:44,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:13:44,284 INFO L478 AbstractCegarLoop]: Abstraction has 147 states and 178 transitions. [2022-04-06 21:13:44,285 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-04-06 21:13:44,285 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 178 transitions. [2022-04-06 21:13:44,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-06 21:13:44,285 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:13:44,285 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:13:44,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-06 21:13:44,499 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-04-06 21:13:44,499 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:13:44,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:13:44,500 INFO L85 PathProgramCache]: Analyzing trace with hash -522529, now seen corresponding path program 3 times [2022-04-06 21:13:44,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:13:44,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1715920481] [2022-04-06 21:13:44,500 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:13:44,501 INFO L85 PathProgramCache]: Analyzing trace with hash -522529, now seen corresponding path program 4 times [2022-04-06 21:13:44,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:13:44,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905657371] [2022-04-06 21:13:44,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:13:44,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:13:44,509 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:13:44,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2010204584] [2022-04-06 21:13:44,509 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:13:44,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:13:44,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:13:44,511 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:13:44,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 21:13:44,553 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:13:44,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:13:44,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-06 21:13:44,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:13:44,838 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 14 proven. 12 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-04-06 21:13:44,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:13:44,988 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 14 proven. 12 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-04-06 21:13:44,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:13:44,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905657371] [2022-04-06 21:13:44,989 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:13:44,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010204584] [2022-04-06 21:13:44,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010204584] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:13:44,989 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:13:44,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-04-06 21:13:44,989 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:13:44,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1715920481] [2022-04-06 21:13:44,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1715920481] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:13:44,990 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:13:44,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 21:13:44,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964068998] [2022-04-06 21:13:44,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:13:44,990 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 21:13:44,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:13:44,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 21:13:44,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-04-06 21:13:44,991 INFO L87 Difference]: Start difference. First operand 147 states and 178 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-04-06 21:13:45,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:13:45,159 INFO L93 Difference]: Finished difference Result 185 states and 223 transitions. [2022-04-06 21:13:45,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 21:13:45,160 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 63 [2022-04-06 21:13:45,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:13:45,162 INFO L225 Difference]: With dead ends: 185 [2022-04-06 21:13:45,162 INFO L226 Difference]: Without dead ends: 183 [2022-04-06 21:13:45,162 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-04-06 21:13:45,163 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 8 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:13:45,163 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 181 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:13:45,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-04-06 21:13:45,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 169. [2022-04-06 21:13:45,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 102 states have (on average 1.1372549019607843) internal successors, (116), 105 states have internal predecessors, (116), 43 states have call successors, (43), 24 states have call predecessors, (43), 23 states have return successors, (41), 39 states have call predecessors, (41), 41 states have call successors, (41) [2022-04-06 21:13:45,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 200 transitions. [2022-04-06 21:13:45,184 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 200 transitions. Word has length 63 [2022-04-06 21:13:45,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:13:45,184 INFO L478 AbstractCegarLoop]: Abstraction has 169 states and 200 transitions. [2022-04-06 21:13:45,185 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-04-06 21:13:45,185 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 200 transitions. [2022-04-06 21:13:45,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-06 21:13:45,185 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:13:45,185 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:13:45,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-06 21:13:45,399 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-04-06 21:13:45,399 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:13:45,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:13:45,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1383919957, now seen corresponding path program 5 times [2022-04-06 21:13:45,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:13:45,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1495699096] [2022-04-06 21:13:45,400 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:13:45,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1383919957, now seen corresponding path program 6 times [2022-04-06 21:13:45,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:13:45,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536765735] [2022-04-06 21:13:45,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:13:45,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:13:45,416 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:13:45,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2029102192] [2022-04-06 21:13:45,416 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:13:45,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:13:45,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:13:45,423 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:13:45,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-06 21:13:45,476 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 21:13:45,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:13:45,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 36 conjunts are in the unsatisfiable core [2022-04-06 21:13:45,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:13:45,834 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 27 proven. 24 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-04-06 21:13:45,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:13:46,116 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 34 proven. 17 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-04-06 21:13:46,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:13:46,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536765735] [2022-04-06 21:13:46,119 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:13:46,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029102192] [2022-04-06 21:13:46,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029102192] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:13:46,119 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:13:46,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2022-04-06 21:13:46,119 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:13:46,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1495699096] [2022-04-06 21:13:46,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1495699096] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:13:46,120 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:13:46,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 21:13:46,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483810923] [2022-04-06 21:13:46,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:13:46,120 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 21:13:46,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:13:46,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 21:13:46,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-04-06 21:13:46,121 INFO L87 Difference]: Start difference. First operand 169 states and 200 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-04-06 21:13:46,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:13:46,372 INFO L93 Difference]: Finished difference Result 191 states and 234 transitions. [2022-04-06 21:13:46,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 21:13:46,373 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 68 [2022-04-06 21:13:46,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:13:46,374 INFO L225 Difference]: With dead ends: 191 [2022-04-06 21:13:46,374 INFO L226 Difference]: Without dead ends: 185 [2022-04-06 21:13:46,375 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 121 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-04-06 21:13:46,375 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 14 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 21:13:46,375 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 147 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 21:13:46,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-04-06 21:13:46,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 172. [2022-04-06 21:13:46,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 103 states have (on average 1.1359223300970873) internal successors, (117), 107 states have internal predecessors, (117), 45 states have call successors, (45), 24 states have call predecessors, (45), 23 states have return successors, (43), 40 states have call predecessors, (43), 43 states have call successors, (43) [2022-04-06 21:13:46,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 205 transitions. [2022-04-06 21:13:46,396 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 205 transitions. Word has length 68 [2022-04-06 21:13:46,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:13:46,397 INFO L478 AbstractCegarLoop]: Abstraction has 172 states and 205 transitions. [2022-04-06 21:13:46,397 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-04-06 21:13:46,397 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 205 transitions. [2022-04-06 21:13:46,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-06 21:13:46,398 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:13:46,398 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:13:46,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-06 21:13:46,610 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-04-06 21:13:46,611 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:13:46,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:13:46,611 INFO L85 PathProgramCache]: Analyzing trace with hash -860063341, now seen corresponding path program 3 times [2022-04-06 21:13:46,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:13:46,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [408898167] [2022-04-06 21:13:46,611 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:13:46,612 INFO L85 PathProgramCache]: Analyzing trace with hash -860063341, now seen corresponding path program 4 times [2022-04-06 21:13:46,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:13:46,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624317865] [2022-04-06 21:13:46,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:13:46,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:13:46,619 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:13:46,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1388129196] [2022-04-06 21:13:46,619 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:13:46,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:13:46,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:13:46,621 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:13:46,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-06 21:13:46,669 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:13:46,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:13:46,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 32 conjunts are in the unsatisfiable core [2022-04-06 21:13:46,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:13:47,024 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 30 proven. 21 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-04-06 21:13:47,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:13:47,284 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 34 proven. 17 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-04-06 21:13:47,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:13:47,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624317865] [2022-04-06 21:13:47,284 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:13:47,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388129196] [2022-04-06 21:13:47,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388129196] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:13:47,285 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:13:47,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2022-04-06 21:13:47,285 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:13:47,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [408898167] [2022-04-06 21:13:47,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [408898167] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:13:47,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:13:47,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 21:13:47,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053298162] [2022-04-06 21:13:47,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:13:47,286 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 21:13:47,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:13:47,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 21:13:47,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-04-06 21:13:47,286 INFO L87 Difference]: Start difference. First operand 172 states and 205 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-04-06 21:13:47,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:13:47,564 INFO L93 Difference]: Finished difference Result 197 states and 245 transitions. [2022-04-06 21:13:47,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 21:13:47,564 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 68 [2022-04-06 21:13:47,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:13:47,565 INFO L225 Difference]: With dead ends: 197 [2022-04-06 21:13:47,565 INFO L226 Difference]: Without dead ends: 188 [2022-04-06 21:13:47,566 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 121 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-04-06 21:13:47,566 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 15 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 21:13:47,566 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 130 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 21:13:47,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-04-06 21:13:47,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2022-04-06 21:13:47,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 112 states have (on average 1.1428571428571428) internal successors, (128), 116 states have internal predecessors, (128), 51 states have call successors, (51), 25 states have call predecessors, (51), 24 states have return successors, (49), 46 states have call predecessors, (49), 49 states have call successors, (49) [2022-04-06 21:13:47,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 228 transitions. [2022-04-06 21:13:47,587 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 228 transitions. Word has length 68 [2022-04-06 21:13:47,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:13:47,587 INFO L478 AbstractCegarLoop]: Abstraction has 188 states and 228 transitions. [2022-04-06 21:13:47,587 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-04-06 21:13:47,587 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 228 transitions. [2022-04-06 21:13:47,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-04-06 21:13:47,588 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:13:47,588 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:13:47,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-06 21:13:47,801 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-04-06 21:13:47,802 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:13:47,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:13:47,802 INFO L85 PathProgramCache]: Analyzing trace with hash -35686306, now seen corresponding path program 7 times [2022-04-06 21:13:47,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:13:47,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [367321762] [2022-04-06 21:13:47,803 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:13:47,803 INFO L85 PathProgramCache]: Analyzing trace with hash -35686306, now seen corresponding path program 8 times [2022-04-06 21:13:47,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:13:47,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520066646] [2022-04-06 21:13:47,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:13:47,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:13:47,810 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:13:47,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1461941041] [2022-04-06 21:13:47,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:13:47,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:13:47,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:13:47,815 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:13:47,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-06 21:13:47,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:13:47,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:13:47,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-06 21:13:47,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:13:48,289 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 20 proven. 27 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-04-06 21:13:48,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:13:48,552 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 20 proven. 27 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-04-06 21:13:48,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:13:48,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520066646] [2022-04-06 21:13:48,553 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:13:48,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461941041] [2022-04-06 21:13:48,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461941041] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:13:48,553 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:13:48,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2022-04-06 21:13:48,554 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:13:48,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [367321762] [2022-04-06 21:13:48,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [367321762] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:13:48,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:13:48,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 21:13:48,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145804514] [2022-04-06 21:13:48,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:13:48,554 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 21:13:48,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:13:48,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 21:13:48,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-04-06 21:13:48,555 INFO L87 Difference]: Start difference. First operand 188 states and 228 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-04-06 21:13:48,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:13:48,794 INFO L93 Difference]: Finished difference Result 222 states and 270 transitions. [2022-04-06 21:13:48,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 21:13:48,795 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 81 [2022-04-06 21:13:48,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:13:48,796 INFO L225 Difference]: With dead ends: 222 [2022-04-06 21:13:48,796 INFO L226 Difference]: Without dead ends: 220 [2022-04-06 21:13:48,797 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 150 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-04-06 21:13:48,797 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 8 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 21:13:48,797 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 200 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 21:13:48,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-04-06 21:13:48,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 216. [2022-04-06 21:13:48,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 130 states have (on average 1.146153846153846) internal successors, (149), 134 states have internal predecessors, (149), 57 states have call successors, (57), 29 states have call predecessors, (57), 28 states have return successors, (55), 52 states have call predecessors, (55), 55 states have call successors, (55) [2022-04-06 21:13:48,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 261 transitions. [2022-04-06 21:13:48,822 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 261 transitions. Word has length 81 [2022-04-06 21:13:48,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:13:48,822 INFO L478 AbstractCegarLoop]: Abstraction has 216 states and 261 transitions. [2022-04-06 21:13:48,822 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-04-06 21:13:48,822 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 261 transitions. [2022-04-06 21:13:48,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-04-06 21:13:48,823 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:13:48,823 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:13:48,849 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-04-06 21:13:49,047 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:13:49,047 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:13:49,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:13:49,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1350517088, now seen corresponding path program 7 times [2022-04-06 21:13:49,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:13:49,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1131451262] [2022-04-06 21:13:49,048 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:13:49,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1350517088, now seen corresponding path program 8 times [2022-04-06 21:13:49,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:13:49,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31619998] [2022-04-06 21:13:49,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:13:49,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:13:49,056 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:13:49,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1065554789] [2022-04-06 21:13:49,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:13:49,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:13:49,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:13:49,061 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:13:49,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-06 21:13:49,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:13:49,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:13:49,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 48 conjunts are in the unsatisfiable core [2022-04-06 21:13:49,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:13:51,341 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 42 proven. 53 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-04-06 21:13:51,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:13:52,431 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 59 proven. 36 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-04-06 21:13:52,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:13:52,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31619998] [2022-04-06 21:13:52,432 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:13:52,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065554789] [2022-04-06 21:13:52,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065554789] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:13:52,432 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:13:52,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2022-04-06 21:13:52,432 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:13:52,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1131451262] [2022-04-06 21:13:52,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1131451262] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:13:52,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:13:52,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 21:13:52,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330019640] [2022-04-06 21:13:52,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:13:52,433 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 21:13:52,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:13:52,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 21:13:52,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-04-06 21:13:52,434 INFO L87 Difference]: Start difference. First operand 216 states and 261 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2022-04-06 21:13:55,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:13:55,923 INFO L93 Difference]: Finished difference Result 257 states and 311 transitions. [2022-04-06 21:13:55,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 21:13:55,924 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) Word has length 81 [2022-04-06 21:13:55,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:13:55,926 INFO L225 Difference]: With dead ends: 257 [2022-04-06 21:13:55,926 INFO L226 Difference]: Without dead ends: 255 [2022-04-06 21:13:55,926 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 144 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2022-04-06 21:13:55,927 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 17 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-04-06 21:13:55,927 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 181 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-04-06 21:13:55,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-04-06 21:13:55,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 221. [2022-04-06 21:13:55,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 135 states have (on average 1.1333333333333333) internal successors, (153), 138 states have internal predecessors, (153), 55 states have call successors, (55), 31 states have call predecessors, (55), 30 states have return successors, (53), 51 states have call predecessors, (53), 53 states have call successors, (53) [2022-04-06 21:13:55,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 261 transitions. [2022-04-06 21:13:55,971 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 261 transitions. Word has length 81 [2022-04-06 21:13:55,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:13:55,971 INFO L478 AbstractCegarLoop]: Abstraction has 221 states and 261 transitions. [2022-04-06 21:13:55,972 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2022-04-06 21:13:55,972 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 261 transitions. [2022-04-06 21:13:55,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-04-06 21:13:55,972 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:13:55,973 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:13:55,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-04-06 21:13:56,179 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-04-06 21:13:56,180 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:13:56,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:13:56,180 INFO L85 PathProgramCache]: Analyzing trace with hash -388774688, now seen corresponding path program 9 times [2022-04-06 21:13:56,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:13:56,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1897140063] [2022-04-06 21:13:56,183 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:13:56,183 INFO L85 PathProgramCache]: Analyzing trace with hash -388774688, now seen corresponding path program 10 times [2022-04-06 21:13:56,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:13:56,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244901537] [2022-04-06 21:13:56,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:13:56,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:13:56,191 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:13:56,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [711643296] [2022-04-06 21:13:56,191 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:13:56,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:13:56,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:13:56,192 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:13:56,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-06 21:13:56,241 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:13:56,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:13:56,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 44 conjunts are in the unsatisfiable core [2022-04-06 21:13:56,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:13:56,819 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 59 proven. 51 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-04-06 21:13:56,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:13:57,135 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 75 proven. 8 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-04-06 21:13:57,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:13:57,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244901537] [2022-04-06 21:13:57,136 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:13:57,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711643296] [2022-04-06 21:13:57,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711643296] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:13:57,136 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:13:57,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2022-04-06 21:13:57,136 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:13:57,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1897140063] [2022-04-06 21:13:57,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1897140063] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:13:57,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:13:57,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 21:13:57,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816834798] [2022-04-06 21:13:57,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:13:57,137 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 21:13:57,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:13:57,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 21:13:57,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-04-06 21:13:57,138 INFO L87 Difference]: Start difference. First operand 221 states and 261 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2022-04-06 21:13:57,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:13:57,617 INFO L93 Difference]: Finished difference Result 261 states and 313 transitions. [2022-04-06 21:13:57,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 21:13:57,617 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) Word has length 81 [2022-04-06 21:13:57,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:13:57,619 INFO L225 Difference]: With dead ends: 261 [2022-04-06 21:13:57,619 INFO L226 Difference]: Without dead ends: 259 [2022-04-06 21:13:57,620 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 145 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-04-06 21:13:57,620 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 15 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 21:13:57,620 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 199 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 21:13:57,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-04-06 21:13:57,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 223. [2022-04-06 21:13:57,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 136 states have (on average 1.1323529411764706) internal successors, (154), 140 states have internal predecessors, (154), 56 states have call successors, (56), 31 states have call predecessors, (56), 30 states have return successors, (54), 51 states have call predecessors, (54), 54 states have call successors, (54) [2022-04-06 21:13:57,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 264 transitions. [2022-04-06 21:13:57,656 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 264 transitions. Word has length 81 [2022-04-06 21:13:57,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:13:57,656 INFO L478 AbstractCegarLoop]: Abstraction has 223 states and 264 transitions. [2022-04-06 21:13:57,656 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2022-04-06 21:13:57,656 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 264 transitions. [2022-04-06 21:13:57,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-04-06 21:13:57,657 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:13:57,657 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:13:57,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-04-06 21:13:57,880 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-04-06 21:13:57,880 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:13:57,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:13:57,880 INFO L85 PathProgramCache]: Analyzing trace with hash 997428706, now seen corresponding path program 11 times [2022-04-06 21:13:57,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:13:57,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1335080672] [2022-04-06 21:13:57,881 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:13:57,881 INFO L85 PathProgramCache]: Analyzing trace with hash 997428706, now seen corresponding path program 12 times [2022-04-06 21:13:57,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:13:57,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585237808] [2022-04-06 21:13:57,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:13:57,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:13:57,887 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:13:57,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [146731915] [2022-04-06 21:13:57,888 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:13:57,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:13:57,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:13:57,889 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:13:57,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-04-06 21:13:57,937 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 21:13:57,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:13:57,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 33 conjunts are in the unsatisfiable core [2022-04-06 21:13:57,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:13:58,207 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 70 proven. 11 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2022-04-06 21:13:58,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:14:01,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:14:01,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585237808] [2022-04-06 21:14:01,475 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:14:01,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146731915] [2022-04-06 21:14:01,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146731915] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:14:01,475 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 21:14:01,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-04-06 21:14:01,476 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:14:01,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1335080672] [2022-04-06 21:14:01,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1335080672] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:14:01,476 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:14:01,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 21:14:01,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438165325] [2022-04-06 21:14:01,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:14:01,477 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 21:14:01,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:14:01,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 21:14:01,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=162, Unknown=1, NotChecked=0, Total=210 [2022-04-06 21:14:01,477 INFO L87 Difference]: Start difference. First operand 223 states and 264 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 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) [2022-04-06 21:14:01,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:14:01,983 INFO L93 Difference]: Finished difference Result 282 states and 346 transitions. [2022-04-06 21:14:01,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 21:14:01,983 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 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 81 [2022-04-06 21:14:01,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:14:01,985 INFO L225 Difference]: With dead ends: 282 [2022-04-06 21:14:01,985 INFO L226 Difference]: Without dead ends: 276 [2022-04-06 21:14:01,986 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 96 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=67, Invalid=238, Unknown=1, NotChecked=0, Total=306 [2022-04-06 21:14:01,986 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 19 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 21:14:01,986 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 162 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 21:14:01,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-04-06 21:14:02,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 233. [2022-04-06 21:14:02,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 142 states have (on average 1.119718309859155) internal successors, (159), 147 states have internal predecessors, (159), 58 states have call successors, (58), 33 states have call predecessors, (58), 32 states have return successors, (56), 52 states have call predecessors, (56), 56 states have call successors, (56) [2022-04-06 21:14:02,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 273 transitions. [2022-04-06 21:14:02,027 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 273 transitions. Word has length 81 [2022-04-06 21:14:02,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:14:02,027 INFO L478 AbstractCegarLoop]: Abstraction has 233 states and 273 transitions. [2022-04-06 21:14:02,027 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 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) [2022-04-06 21:14:02,027 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 273 transitions. [2022-04-06 21:14:02,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-04-06 21:14:02,028 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:14:02,028 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:14:02,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-04-06 21:14:02,243 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-04-06 21:14:02,244 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:14:02,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:14:02,244 INFO L85 PathProgramCache]: Analyzing trace with hash 327884660, now seen corresponding path program 13 times [2022-04-06 21:14:02,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:14:02,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1242680436] [2022-04-06 21:14:02,244 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:14:02,244 INFO L85 PathProgramCache]: Analyzing trace with hash 327884660, now seen corresponding path program 14 times [2022-04-06 21:14:02,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:14:02,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100148822] [2022-04-06 21:14:02,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:14:02,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:14:02,251 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:14:02,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [902480024] [2022-04-06 21:14:02,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:14:02,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:14:02,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:14:02,254 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:14:02,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-04-06 21:14:02,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:14:02,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:14:02,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-06 21:14:02,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:14:02,780 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 22 proven. 30 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-04-06 21:14:02,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:14:03,405 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 22 proven. 30 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-04-06 21:14:03,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:14:03,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100148822] [2022-04-06 21:14:03,405 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:14:03,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902480024] [2022-04-06 21:14:03,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902480024] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:14:03,406 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:14:03,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-04-06 21:14:03,406 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:14:03,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1242680436] [2022-04-06 21:14:03,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1242680436] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:14:03,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:14:03,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 21:14:03,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739092018] [2022-04-06 21:14:03,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:14:03,406 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 21:14:03,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:14:03,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 21:14:03,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-04-06 21:14:03,407 INFO L87 Difference]: Start difference. First operand 233 states and 273 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-04-06 21:14:03,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:14:03,727 INFO L93 Difference]: Finished difference Result 255 states and 307 transitions. [2022-04-06 21:14:03,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 21:14:03,730 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 86 [2022-04-06 21:14:03,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:14:03,732 INFO L225 Difference]: With dead ends: 255 [2022-04-06 21:14:03,732 INFO L226 Difference]: Without dead ends: 249 [2022-04-06 21:14:03,733 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 158 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-04-06 21:14:03,733 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 9 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 21:14:03,733 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 205 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 21:14:03,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-04-06 21:14:03,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 236. [2022-04-06 21:14:03,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 143 states have (on average 1.118881118881119) internal successors, (160), 149 states have internal predecessors, (160), 60 states have call successors, (60), 33 states have call predecessors, (60), 32 states have return successors, (58), 53 states have call predecessors, (58), 58 states have call successors, (58) [2022-04-06 21:14:03,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 278 transitions. [2022-04-06 21:14:03,772 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 278 transitions. Word has length 86 [2022-04-06 21:14:03,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:14:03,773 INFO L478 AbstractCegarLoop]: Abstraction has 236 states and 278 transitions. [2022-04-06 21:14:03,773 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-04-06 21:14:03,773 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 278 transitions. [2022-04-06 21:14:03,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-04-06 21:14:03,774 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:14:03,774 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:14:03,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-04-06 21:14:03,981 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:14:03,982 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:14:03,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:14:03,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1916098638, now seen corresponding path program 15 times [2022-04-06 21:14:03,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:14:03,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [440235192] [2022-04-06 21:14:03,982 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:14:03,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1916098638, now seen corresponding path program 16 times [2022-04-06 21:14:03,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:14:03,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028510542] [2022-04-06 21:14:03,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:14:03,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:14:03,988 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:14:03,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1910971116] [2022-04-06 21:14:03,988 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:14:03,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:14:03,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:14:03,989 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:14:03,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-04-06 21:14:04,034 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:14:04,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:14:04,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 50 conjunts are in the unsatisfiable core [2022-04-06 21:14:04,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:14:05,358 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:14:05,605 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:14:05,846 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 79 proven. 45 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2022-04-06 21:14:05,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:14:06,214 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 87 proven. 5 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-04-06 21:14:06,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:14:06,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028510542] [2022-04-06 21:14:06,214 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:14:06,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910971116] [2022-04-06 21:14:06,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910971116] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:14:06,215 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:14:06,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 18 [2022-04-06 21:14:06,215 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:14:06,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [440235192] [2022-04-06 21:14:06,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [440235192] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:14:06,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:14:06,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 21:14:06,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238031385] [2022-04-06 21:14:06,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:14:06,216 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 21:14:06,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:14:06,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 21:14:06,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2022-04-06 21:14:06,216 INFO L87 Difference]: Start difference. First operand 236 states and 278 transitions. Second operand has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) [2022-04-06 21:14:08,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:14:08,426 INFO L93 Difference]: Finished difference Result 282 states and 338 transitions. [2022-04-06 21:14:08,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 21:14:08,426 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) Word has length 86 [2022-04-06 21:14:08,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:14:08,428 INFO L225 Difference]: With dead ends: 282 [2022-04-06 21:14:08,428 INFO L226 Difference]: Without dead ends: 272 [2022-04-06 21:14:08,428 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 153 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2022-04-06 21:14:08,429 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 17 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:14:08,429 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 237 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 675 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-04-06 21:14:08,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-04-06 21:14:08,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 254. [2022-04-06 21:14:08,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 155 states have (on average 1.1161290322580646) internal successors, (173), 161 states have internal predecessors, (173), 63 states have call successors, (63), 36 states have call predecessors, (63), 35 states have return successors, (61), 56 states have call predecessors, (61), 61 states have call successors, (61) [2022-04-06 21:14:08,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 297 transitions. [2022-04-06 21:14:08,481 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 297 transitions. Word has length 86 [2022-04-06 21:14:08,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:14:08,482 INFO L478 AbstractCegarLoop]: Abstraction has 254 states and 297 transitions. [2022-04-06 21:14:08,482 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) [2022-04-06 21:14:08,482 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 297 transitions. [2022-04-06 21:14:08,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-04-06 21:14:08,483 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:14:08,483 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:14:08,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-04-06 21:14:08,699 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:14:08,699 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:14:08,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:14:08,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1866224690, now seen corresponding path program 17 times [2022-04-06 21:14:08,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:14:08,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [520821893] [2022-04-06 21:14:08,700 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:14:08,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1866224690, now seen corresponding path program 18 times [2022-04-06 21:14:08,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:14:08,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696095691] [2022-04-06 21:14:08,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:14:08,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:14:08,706 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:14:08,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [417775103] [2022-04-06 21:14:08,707 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:14:08,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:14:08,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:14:08,708 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:14:08,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-04-06 21:14:08,749 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 21:14:08,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:14:08,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-06 21:14:08,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:14:11,381 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 71 proven. 29 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2022-04-06 21:14:11,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:14:19,550 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 87 proven. 5 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-04-06 21:14:19,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:14:19,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696095691] [2022-04-06 21:14:19,550 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:14:19,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417775103] [2022-04-06 21:14:19,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417775103] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:14:19,550 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:14:19,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 14 [2022-04-06 21:14:19,551 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:14:19,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [520821893] [2022-04-06 21:14:19,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [520821893] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:14:19,551 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:14:19,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 21:14:19,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529335529] [2022-04-06 21:14:19,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:14:19,551 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 21:14:19,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:14:19,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 21:14:19,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=143, Unknown=3, NotChecked=0, Total=182 [2022-04-06 21:14:19,552 INFO L87 Difference]: Start difference. First operand 254 states and 297 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 6 states have call predecessors, (11), 4 states have call successors, (11) [2022-04-06 21:14:21,740 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:14:23,368 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:14:32,428 WARN L232 SmtUtils]: Spent 9.01s on a formula simplification. DAG size of input: 51 DAG size of output: 36 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 21:14:34,545 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:14:36,548 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:14:38,550 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:14:40,134 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:14:42,072 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:14:44,076 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:14:46,078 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:14:48,082 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:14:49,776 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:14:52,326 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:14:53,918 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:14:55,919 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:14:57,923 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:14:59,965 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:15:01,283 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:15:03,285 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:15:05,287 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:15:07,290 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:15:09,292 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:15:11,296 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:15:11,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:15:11,665 INFO L93 Difference]: Finished difference Result 298 states and 364 transitions. [2022-04-06 21:15:11,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 21:15:11,665 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 6 states have call predecessors, (11), 4 states have call successors, (11) Word has length 86 [2022-04-06 21:15:11,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:15:11,667 INFO L225 Difference]: With dead ends: 298 [2022-04-06 21:15:11,667 INFO L226 Difference]: Without dead ends: 288 [2022-04-06 21:15:11,667 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 157 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 19.2s TimeCoverageRelationStatistics Valid=55, Invalid=214, Unknown=3, NotChecked=0, Total=272 [2022-04-06 21:15:11,668 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 21 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 19 mSolverCounterUnsat, 16 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 42.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 16 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 43.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:15:11,668 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 168 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 410 Invalid, 16 Unknown, 0 Unchecked, 43.0s Time] [2022-04-06 21:15:11,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-04-06 21:15:11,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 283. [2022-04-06 21:15:11,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 173 states have (on average 1.1445086705202312) internal successors, (198), 177 states have internal predecessors, (198), 73 states have call successors, (73), 37 states have call predecessors, (73), 36 states have return successors, (71), 68 states have call predecessors, (71), 71 states have call successors, (71) [2022-04-06 21:15:11,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 342 transitions. [2022-04-06 21:15:11,741 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 342 transitions. Word has length 86 [2022-04-06 21:15:11,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:15:11,741 INFO L478 AbstractCegarLoop]: Abstraction has 283 states and 342 transitions. [2022-04-06 21:15:11,741 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 6 states have call predecessors, (11), 4 states have call successors, (11) [2022-04-06 21:15:11,741 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 342 transitions. [2022-04-06 21:15:11,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-04-06 21:15:11,742 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:15:11,743 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:15:11,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-04-06 21:15:11,947 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-04-06 21:15:11,947 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:15:11,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:15:11,948 INFO L85 PathProgramCache]: Analyzing trace with hash 396850335, now seen corresponding path program 9 times [2022-04-06 21:15:11,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:15:11,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1159310623] [2022-04-06 21:15:11,948 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:15:11,948 INFO L85 PathProgramCache]: Analyzing trace with hash 396850335, now seen corresponding path program 10 times [2022-04-06 21:15:11,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:15:11,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266493943] [2022-04-06 21:15:11,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:15:11,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:15:11,961 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:15:11,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1787462446] [2022-04-06 21:15:11,961 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:15:11,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:15:11,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:15:11,963 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:15:11,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-04-06 21:15:12,009 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:15:12,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:15:12,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-06 21:15:12,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:15:13,396 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 70 proven. 112 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2022-04-06 21:15:13,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:15:13,766 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 102 proven. 26 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2022-04-06 21:15:13,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:15:13,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266493943] [2022-04-06 21:15:13,767 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:15:13,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787462446] [2022-04-06 21:15:13,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787462446] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:15:13,767 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:15:13,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 18 [2022-04-06 21:15:13,767 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:15:13,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1159310623] [2022-04-06 21:15:13,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1159310623] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:15:13,767 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:15:13,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 21:15:13,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991038233] [2022-04-06 21:15:13,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:15:13,768 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 21:15:13,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:15:13,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 21:15:13,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2022-04-06 21:15:13,768 INFO L87 Difference]: Start difference. First operand 283 states and 342 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-04-06 21:15:15,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:15:15,222 INFO L93 Difference]: Finished difference Result 313 states and 381 transitions. [2022-04-06 21:15:15,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 21:15:15,224 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) Word has length 99 [2022-04-06 21:15:15,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:15:15,225 INFO L225 Difference]: With dead ends: 313 [2022-04-06 21:15:15,225 INFO L226 Difference]: Without dead ends: 311 [2022-04-06 21:15:15,226 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 178 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-04-06 21:15:15,226 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 16 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 692 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-06 21:15:15,226 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 243 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 692 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-06 21:15:15,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-04-06 21:15:15,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 307. [2022-04-06 21:15:15,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 188 states have (on average 1.148936170212766) internal successors, (216), 192 states have internal predecessors, (216), 79 states have call successors, (79), 40 states have call predecessors, (79), 39 states have return successors, (77), 74 states have call predecessors, (77), 77 states have call successors, (77) [2022-04-06 21:15:15,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 372 transitions. [2022-04-06 21:15:15,301 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 372 transitions. Word has length 99 [2022-04-06 21:15:15,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:15:15,301 INFO L478 AbstractCegarLoop]: Abstraction has 307 states and 372 transitions. [2022-04-06 21:15:15,301 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-04-06 21:15:15,301 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 372 transitions. [2022-04-06 21:15:15,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-04-06 21:15:15,302 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:15:15,302 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:15:15,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-04-06 21:15:15,503 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-04-06 21:15:15,503 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:15:15,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:15:15,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1783053729, now seen corresponding path program 19 times [2022-04-06 21:15:15,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:15:15,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1319153604] [2022-04-06 21:15:15,504 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:15:15,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1783053729, now seen corresponding path program 20 times [2022-04-06 21:15:15,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:15:15,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852003975] [2022-04-06 21:15:15,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:15:15,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:15:15,510 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:15:15,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1331919070] [2022-04-06 21:15:15,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:15:15,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:15:15,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:15:15,511 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:15:15,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-04-06 21:15:15,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:15:15,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:15:15,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 43 conjunts are in the unsatisfiable core [2022-04-06 21:15:15,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:15:16,247 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 26 proven. 48 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-04-06 21:15:16,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:15:16,778 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 26 proven. 48 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-04-06 21:15:16,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:15:16,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852003975] [2022-04-06 21:15:16,779 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:15:16,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331919070] [2022-04-06 21:15:16,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331919070] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:15:16,779 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:15:16,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-04-06 21:15:16,779 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:15:16,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1319153604] [2022-04-06 21:15:16,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1319153604] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:15:16,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:15:16,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 21:15:16,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026051113] [2022-04-06 21:15:16,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:15:16,780 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 21:15:16,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:15:16,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 21:15:16,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-04-06 21:15:16,781 INFO L87 Difference]: Start difference. First operand 307 states and 372 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-04-06 21:15:17,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:15:17,351 INFO L93 Difference]: Finished difference Result 348 states and 422 transitions. [2022-04-06 21:15:17,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 21:15:17,351 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 99 [2022-04-06 21:15:17,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:15:17,353 INFO L225 Difference]: With dead ends: 348 [2022-04-06 21:15:17,353 INFO L226 Difference]: Without dead ends: 346 [2022-04-06 21:15:17,354 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 182 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-04-06 21:15:17,354 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 9 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 21:15:17,354 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 268 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 21:15:17,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2022-04-06 21:15:17,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 332. [2022-04-06 21:15:17,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 205 states have (on average 1.146341463414634) internal successors, (235), 208 states have internal predecessors, (235), 83 states have call successors, (83), 44 states have call predecessors, (83), 43 states have return successors, (81), 79 states have call predecessors, (81), 81 states have call successors, (81) [2022-04-06 21:15:17,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 399 transitions. [2022-04-06 21:15:17,453 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 399 transitions. Word has length 99 [2022-04-06 21:15:17,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:15:17,454 INFO L478 AbstractCegarLoop]: Abstraction has 332 states and 399 transitions. [2022-04-06 21:15:17,455 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-04-06 21:15:17,455 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 399 transitions. [2022-04-06 21:15:17,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-04-06 21:15:17,457 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:15:17,457 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:15:17,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-04-06 21:15:17,671 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:15:17,671 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:15:17,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:15:17,672 INFO L85 PathProgramCache]: Analyzing trace with hash 43761953, now seen corresponding path program 21 times [2022-04-06 21:15:17,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:15:17,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [331817117] [2022-04-06 21:15:17,672 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:15:17,673 INFO L85 PathProgramCache]: Analyzing trace with hash 43761953, now seen corresponding path program 22 times [2022-04-06 21:15:17,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:15:17,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684620702] [2022-04-06 21:15:17,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:15:17,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:15:17,684 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:15:17,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1477061474] [2022-04-06 21:15:17,684 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:15:17,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:15:17,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:15:17,688 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:15:17,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-04-06 21:15:17,734 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:15:17,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:15:17,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-06 21:15:17,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:15:18,655 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 80 proven. 84 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2022-04-06 21:15:18,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:15:18,937 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 105 proven. 8 refuted. 0 times theorem prover too weak. 277 trivial. 0 not checked. [2022-04-06 21:15:18,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:15:18,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684620702] [2022-04-06 21:15:18,937 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:15:18,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477061474] [2022-04-06 21:15:18,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477061474] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:15:18,938 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:15:18,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2022-04-06 21:15:18,938 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:15:18,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [331817117] [2022-04-06 21:15:18,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [331817117] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:15:18,938 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:15:18,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 21:15:18,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561106357] [2022-04-06 21:15:18,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:15:18,939 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 21:15:18,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:15:18,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 21:15:18,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-04-06 21:15:18,939 INFO L87 Difference]: Start difference. First operand 332 states and 399 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-04-06 21:15:20,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:15:20,270 INFO L93 Difference]: Finished difference Result 366 states and 441 transitions. [2022-04-06 21:15:20,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 21:15:20,271 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 99 [2022-04-06 21:15:20,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:15:20,272 INFO L225 Difference]: With dead ends: 366 [2022-04-06 21:15:20,272 INFO L226 Difference]: Without dead ends: 364 [2022-04-06 21:15:20,273 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 181 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2022-04-06 21:15:20,273 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 14 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 21:15:20,273 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 206 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 21:15:20,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-04-06 21:15:20,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 350. [2022-04-06 21:15:20,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 217 states have (on average 1.1428571428571428) internal successors, (248), 220 states have internal predecessors, (248), 86 states have call successors, (86), 47 states have call predecessors, (86), 46 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2022-04-06 21:15:20,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 418 transitions. [2022-04-06 21:15:20,361 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 418 transitions. Word has length 99 [2022-04-06 21:15:20,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:15:20,361 INFO L478 AbstractCegarLoop]: Abstraction has 350 states and 418 transitions. [2022-04-06 21:15:20,361 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-04-06 21:15:20,361 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 418 transitions. [2022-04-06 21:15:20,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-04-06 21:15:20,362 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:15:20,363 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:15:20,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-04-06 21:15:20,585 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:15:20,585 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:15:20,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:15:20,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1429965347, now seen corresponding path program 23 times [2022-04-06 21:15:20,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:15:20,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1760976750] [2022-04-06 21:15:20,586 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:15:20,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1429965347, now seen corresponding path program 24 times [2022-04-06 21:15:20,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:15:20,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472064320] [2022-04-06 21:15:20,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:15:20,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:15:20,592 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:15:20,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1722255512] [2022-04-06 21:15:20,592 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:15:20,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:15:20,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:15:20,593 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:15:20,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-04-06 21:15:21,177 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 21:15:21,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:15:21,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 52 conjunts are in the unsatisfiable core [2022-04-06 21:15:21,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:15:23,005 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 105 proven. 33 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2022-04-06 21:15:23,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:15:23,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:15:23,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472064320] [2022-04-06 21:15:23,287 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:15:23,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722255512] [2022-04-06 21:15:23,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722255512] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:15:23,288 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 21:15:23,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-04-06 21:15:23,288 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:15:23,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1760976750] [2022-04-06 21:15:23,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1760976750] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:15:23,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:15:23,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 21:15:23,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226151879] [2022-04-06 21:15:23,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:15:23,289 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 21:15:23,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:15:23,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 21:15:23,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2022-04-06 21:15:23,289 INFO L87 Difference]: Start difference. First operand 350 states and 418 transitions. Second operand has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) [2022-04-06 21:15:25,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:15:25,553 INFO L93 Difference]: Finished difference Result 422 states and 520 transitions. [2022-04-06 21:15:25,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 21:15:25,553 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) Word has length 99 [2022-04-06 21:15:25,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:15:25,555 INFO L225 Difference]: With dead ends: 422 [2022-04-06 21:15:25,555 INFO L226 Difference]: Without dead ends: 416 [2022-04-06 21:15:25,556 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2022-04-06 21:15:25,556 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 35 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-04-06 21:15:25,556 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 148 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-04-06 21:15:25,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2022-04-06 21:15:25,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 397. [2022-04-06 21:15:25,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 243 states have (on average 1.1481481481481481) internal successors, (279), 247 states have internal predecessors, (279), 102 states have call successors, (102), 52 states have call predecessors, (102), 51 states have return successors, (100), 97 states have call predecessors, (100), 100 states have call successors, (100) [2022-04-06 21:15:25,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 481 transitions. [2022-04-06 21:15:25,650 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 481 transitions. Word has length 99 [2022-04-06 21:15:25,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:15:25,650 INFO L478 AbstractCegarLoop]: Abstraction has 397 states and 481 transitions. [2022-04-06 21:15:25,650 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) [2022-04-06 21:15:25,650 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 481 transitions. [2022-04-06 21:15:25,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-04-06 21:15:25,652 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:15:25,652 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:15:25,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-04-06 21:15:25,858 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-04-06 21:15:25,859 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:15:25,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:15:25,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1289329503, now seen corresponding path program 25 times [2022-04-06 21:15:25,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:15:25,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1385029162] [2022-04-06 21:15:25,859 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:15:25,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1289329503, now seen corresponding path program 26 times [2022-04-06 21:15:25,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:15:25,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385526676] [2022-04-06 21:15:25,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:15:25,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:15:25,869 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:15:25,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1356585899] [2022-04-06 21:15:25,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:15:25,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:15:25,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:15:25,871 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:15:25,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-04-06 21:15:25,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:15:25,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:15:25,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 52 conjunts are in the unsatisfiable core [2022-04-06 21:15:25,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:15:28,862 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 98 proven. 66 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2022-04-06 21:15:28,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:15:32,240 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 105 proven. 8 refuted. 0 times theorem prover too weak. 277 trivial. 0 not checked. [2022-04-06 21:15:32,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:15:32,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385526676] [2022-04-06 21:15:32,241 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:15:32,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356585899] [2022-04-06 21:15:32,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356585899] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:15:32,241 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:15:32,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2022-04-06 21:15:32,241 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:15:32,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1385029162] [2022-04-06 21:15:32,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1385029162] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:15:32,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:15:32,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 21:15:32,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258405822] [2022-04-06 21:15:32,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:15:32,242 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 21:15:32,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:15:32,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 21:15:32,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-04-06 21:15:32,243 INFO L87 Difference]: Start difference. First operand 397 states and 481 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-04-06 21:15:34,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:15:34,167 INFO L93 Difference]: Finished difference Result 427 states and 520 transitions. [2022-04-06 21:15:34,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 21:15:34,167 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 99 [2022-04-06 21:15:34,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:15:34,169 INFO L225 Difference]: With dead ends: 427 [2022-04-06 21:15:34,169 INFO L226 Difference]: Without dead ends: 425 [2022-04-06 21:15:34,170 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 180 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-04-06 21:15:34,170 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 14 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-04-06 21:15:34,170 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 228 Invalid, 640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 628 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-04-06 21:15:34,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2022-04-06 21:15:34,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 401. [2022-04-06 21:15:34,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 246 states have (on average 1.146341463414634) internal successors, (282), 250 states have internal predecessors, (282), 102 states have call successors, (102), 53 states have call predecessors, (102), 52 states have return successors, (100), 97 states have call predecessors, (100), 100 states have call successors, (100) [2022-04-06 21:15:34,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 484 transitions. [2022-04-06 21:15:34,287 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 484 transitions. Word has length 99 [2022-04-06 21:15:34,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:15:34,287 INFO L478 AbstractCegarLoop]: Abstraction has 401 states and 484 transitions. [2022-04-06 21:15:34,287 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-04-06 21:15:34,288 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 484 transitions. [2022-04-06 21:15:34,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-04-06 21:15:34,289 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:15:34,289 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:15:34,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-04-06 21:15:34,512 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-04-06 21:15:34,512 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:15:34,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:15:34,513 INFO L85 PathProgramCache]: Analyzing trace with hash 96873891, now seen corresponding path program 27 times [2022-04-06 21:15:34,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:15:34,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [945609325] [2022-04-06 21:15:34,513 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:15:34,513 INFO L85 PathProgramCache]: Analyzing trace with hash 96873891, now seen corresponding path program 28 times [2022-04-06 21:15:34,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:15:34,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461787272] [2022-04-06 21:15:34,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:15:34,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:15:34,522 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:15:34,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1242672717] [2022-04-06 21:15:34,523 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:15:34,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:15:34,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:15:34,524 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:15:34,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-04-06 21:15:34,575 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:15:34,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:15:34,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 45 conjunts are in the unsatisfiable core [2022-04-06 21:15:34,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:15:35,415 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 84 proven. 56 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2022-04-06 21:15:35,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:15:35,697 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 105 proven. 8 refuted. 0 times theorem prover too weak. 277 trivial. 0 not checked. [2022-04-06 21:15:35,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:15:35,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461787272] [2022-04-06 21:15:35,697 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:15:35,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242672717] [2022-04-06 21:15:35,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242672717] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:15:35,697 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:15:35,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 17 [2022-04-06 21:15:35,697 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:15:35,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [945609325] [2022-04-06 21:15:35,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [945609325] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:15:35,698 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:15:35,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 21:15:35,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853536700] [2022-04-06 21:15:35,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:15:35,698 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 21:15:35,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:15:35,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 21:15:35,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-04-06 21:15:35,698 INFO L87 Difference]: Start difference. First operand 401 states and 484 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2022-04-06 21:15:38,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:15:38,419 INFO L93 Difference]: Finished difference Result 437 states and 539 transitions. [2022-04-06 21:15:38,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 21:15:38,420 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) Word has length 99 [2022-04-06 21:15:38,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:15:38,422 INFO L225 Difference]: With dead ends: 437 [2022-04-06 21:15:38,422 INFO L226 Difference]: Without dead ends: 431 [2022-04-06 21:15:38,423 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 181 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2022-04-06 21:15:38,423 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 15 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-04-06 21:15:38,423 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 241 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 752 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-04-06 21:15:38,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2022-04-06 21:15:38,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 417. [2022-04-06 21:15:38,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 255 states have (on average 1.1529411764705881) internal successors, (294), 259 states have internal predecessors, (294), 108 states have call successors, (108), 54 states have call predecessors, (108), 53 states have return successors, (106), 103 states have call predecessors, (106), 106 states have call successors, (106) [2022-04-06 21:15:38,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 508 transitions. [2022-04-06 21:15:38,522 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 508 transitions. Word has length 99 [2022-04-06 21:15:38,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:15:38,522 INFO L478 AbstractCegarLoop]: Abstraction has 417 states and 508 transitions. [2022-04-06 21:15:38,522 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2022-04-06 21:15:38,522 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 508 transitions. [2022-04-06 21:15:38,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-04-06 21:15:38,523 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:15:38,524 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:15:38,546 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-04-06 21:15:38,741 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-04-06 21:15:38,741 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:15:38,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:15:38,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1642417885, now seen corresponding path program 29 times [2022-04-06 21:15:38,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:15:38,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1536641170] [2022-04-06 21:15:38,742 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:15:38,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1642417885, now seen corresponding path program 30 times [2022-04-06 21:15:38,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:15:38,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127810468] [2022-04-06 21:15:38,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:15:38,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:15:38,747 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:15:38,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1828872726] [2022-04-06 21:15:38,748 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:15:38,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:15:38,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:15:38,749 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:15:38,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-04-06 21:15:38,805 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 21:15:38,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:15:38,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 21:15:38,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:15:39,219 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 60 proven. 70 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2022-04-06 21:15:39,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:15:47,665 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 74 proven. 46 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2022-04-06 21:15:47,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:15:47,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127810468] [2022-04-06 21:15:47,665 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:15:47,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828872726] [2022-04-06 21:15:47,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828872726] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:15:47,666 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:15:47,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2022-04-06 21:15:47,666 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:15:47,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1536641170] [2022-04-06 21:15:47,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1536641170] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:15:47,666 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:15:47,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 21:15:47,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932933521] [2022-04-06 21:15:47,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:15:47,667 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 21:15:47,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:15:47,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 21:15:47,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=162, Unknown=2, NotChecked=0, Total=210 [2022-04-06 21:15:47,667 INFO L87 Difference]: Start difference. First operand 417 states and 508 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, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2022-04-06 21:15:49,924 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:15:50,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:15:50,607 INFO L93 Difference]: Finished difference Result 474 states and 583 transitions. [2022-04-06 21:15:50,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 21:15:50,608 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, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 99 [2022-04-06 21:15:50,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:15:50,610 INFO L225 Difference]: With dead ends: 474 [2022-04-06 21:15:50,610 INFO L226 Difference]: Without dead ends: 472 [2022-04-06 21:15:50,610 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 181 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=59, Invalid=211, Unknown=2, NotChecked=0, Total=272 [2022-04-06 21:15:50,611 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 20 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 16 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-04-06 21:15:50,611 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 129 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 300 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2022-04-06 21:15:50,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2022-04-06 21:15:50,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 403. [2022-04-06 21:15:50,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 246 states have (on average 1.146341463414634) internal successors, (282), 253 states have internal predecessors, (282), 104 states have call successors, (104), 53 states have call predecessors, (104), 52 states have return successors, (102), 96 states have call predecessors, (102), 102 states have call successors, (102) [2022-04-06 21:15:50,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 488 transitions. [2022-04-06 21:15:50,705 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 488 transitions. Word has length 99 [2022-04-06 21:15:50,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:15:50,705 INFO L478 AbstractCegarLoop]: Abstraction has 403 states and 488 transitions. [2022-04-06 21:15:50,705 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, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2022-04-06 21:15:50,705 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 488 transitions. [2022-04-06 21:15:50,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-04-06 21:15:50,707 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:15:50,707 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:15:50,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-04-06 21:15:50,929 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-04-06 21:15:50,929 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:15:50,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:15:50,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1917559763, now seen corresponding path program 31 times [2022-04-06 21:15:50,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:15:50,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1929447668] [2022-04-06 21:15:50,930 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:15:50,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1917559763, now seen corresponding path program 32 times [2022-04-06 21:15:50,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:15:50,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701098650] [2022-04-06 21:15:50,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:15:50,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:15:50,937 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:15:50,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2132014732] [2022-04-06 21:15:50,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:15:50,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:15:50,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:15:50,938 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:15:50,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-04-06 21:15:51,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:15:51,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:15:51,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-06 21:15:51,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:15:51,457 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 28 proven. 52 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2022-04-06 21:15:51,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:15:51,695 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 28 proven. 52 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2022-04-06 21:15:51,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:15:51,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701098650] [2022-04-06 21:15:51,695 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:15:51,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132014732] [2022-04-06 21:15:51,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132014732] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:15:51,696 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:15:51,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-04-06 21:15:51,696 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:15:51,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1929447668] [2022-04-06 21:15:51,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1929447668] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:15:51,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:15:51,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 21:15:51,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534145383] [2022-04-06 21:15:51,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:15:51,696 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 21:15:51,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:15:51,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 21:15:51,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-04-06 21:15:51,697 INFO L87 Difference]: Start difference. First operand 403 states and 488 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 6 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-04-06 21:15:52,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:15:52,041 INFO L93 Difference]: Finished difference Result 429 states and 525 transitions. [2022-04-06 21:15:52,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 21:15:52,044 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 6 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 104 [2022-04-06 21:15:52,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:15:52,046 INFO L225 Difference]: With dead ends: 429 [2022-04-06 21:15:52,046 INFO L226 Difference]: Without dead ends: 423 [2022-04-06 21:15:52,047 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 194 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-04-06 21:15:52,051 INFO L913 BasicCegarLoop]: 55 mSDtfsCounter, 8 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 21:15:52,051 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 239 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 21:15:52,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2022-04-06 21:15:52,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 423. [2022-04-06 21:15:52,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 258 states have (on average 1.1472868217054264) internal successors, (296), 265 states have internal predecessors, (296), 110 states have call successors, (110), 55 states have call predecessors, (110), 54 states have return successors, (108), 102 states have call predecessors, (108), 108 states have call successors, (108) [2022-04-06 21:15:52,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 514 transitions. [2022-04-06 21:15:52,155 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 514 transitions. Word has length 104 [2022-04-06 21:15:52,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:15:52,155 INFO L478 AbstractCegarLoop]: Abstraction has 423 states and 514 transitions. [2022-04-06 21:15:52,156 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 6 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-04-06 21:15:52,156 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 514 transitions. [2022-04-06 21:15:52,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-04-06 21:15:52,157 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:15:52,157 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:15:52,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-04-06 21:15:52,383 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-04-06 21:15:52,384 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:15:52,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:15:52,384 INFO L85 PathProgramCache]: Analyzing trace with hash -326423535, now seen corresponding path program 33 times [2022-04-06 21:15:52,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:15:52,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1377544659] [2022-04-06 21:15:52,384 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:15:52,385 INFO L85 PathProgramCache]: Analyzing trace with hash -326423535, now seen corresponding path program 34 times [2022-04-06 21:15:52,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:15:52,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415828259] [2022-04-06 21:15:52,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:15:52,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:15:52,390 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:15:52,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [937941090] [2022-04-06 21:15:52,390 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:15:52,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:15:52,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:15:52,391 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:15:52,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-04-06 21:15:52,437 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:15:52,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:15:52,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 71 conjunts are in the unsatisfiable core [2022-04-06 21:15:52,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:15:53,302 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 104 proven. 114 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2022-04-06 21:15:53,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:15:53,653 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 117 proven. 5 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2022-04-06 21:15:53,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:15:53,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415828259] [2022-04-06 21:15:53,653 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:15:53,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937941090] [2022-04-06 21:15:53,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937941090] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:15:53,653 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:15:53,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10] total 22 [2022-04-06 21:15:53,654 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:15:53,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1377544659] [2022-04-06 21:15:53,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1377544659] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:15:53,654 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:15:53,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 21:15:53,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003971145] [2022-04-06 21:15:53,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:15:53,654 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 21:15:53,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:15:53,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 21:15:53,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2022-04-06 21:15:53,655 INFO L87 Difference]: Start difference. First operand 423 states and 514 transitions. Second operand has 17 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 9 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 9 states have call predecessors, (17), 8 states have call successors, (17) [2022-04-06 21:15:55,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:15:55,086 INFO L93 Difference]: Finished difference Result 469 states and 574 transitions. [2022-04-06 21:15:55,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 21:15:55,086 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 9 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 9 states have call predecessors, (17), 8 states have call successors, (17) Word has length 104 [2022-04-06 21:15:55,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:15:55,088 INFO L225 Difference]: With dead ends: 469 [2022-04-06 21:15:55,088 INFO L226 Difference]: Without dead ends: 459 [2022-04-06 21:15:55,088 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 183 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2022-04-06 21:15:55,089 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 34 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 817 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-06 21:15:55,089 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 178 Invalid, 879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 817 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-06 21:15:55,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2022-04-06 21:15:55,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 441. [2022-04-06 21:15:55,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 270 states have (on average 1.1444444444444444) internal successors, (309), 277 states have internal predecessors, (309), 113 states have call successors, (113), 58 states have call predecessors, (113), 57 states have return successors, (111), 105 states have call predecessors, (111), 111 states have call successors, (111) [2022-04-06 21:15:55,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 533 transitions. [2022-04-06 21:15:55,201 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 533 transitions. Word has length 104 [2022-04-06 21:15:55,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:15:55,202 INFO L478 AbstractCegarLoop]: Abstraction has 441 states and 533 transitions. [2022-04-06 21:15:55,202 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 9 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 9 states have call predecessors, (17), 8 states have call successors, (17) [2022-04-06 21:15:55,202 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 533 transitions. [2022-04-06 21:15:55,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-04-06 21:15:55,203 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:15:55,203 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:15:55,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-04-06 21:15:55,409 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:15:55,409 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:15:55,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:15:55,409 INFO L85 PathProgramCache]: Analyzing trace with hash -839067503, now seen corresponding path program 35 times [2022-04-06 21:15:55,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:15:55,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [93451490] [2022-04-06 21:15:55,410 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:15:55,410 INFO L85 PathProgramCache]: Analyzing trace with hash -839067503, now seen corresponding path program 36 times [2022-04-06 21:15:55,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:15:55,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210993959] [2022-04-06 21:15:55,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:15:55,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:15:55,415 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:15:55,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [966995790] [2022-04-06 21:15:55,415 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:15:55,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:15:55,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:15:55,417 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:15:55,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-04-06 21:15:55,935 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 21:15:55,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:15:55,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 57 conjunts are in the unsatisfiable core [2022-04-06 21:15:55,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:16:42,436 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 127 proven. 48 refuted. 1 times theorem prover too weak. 272 trivial. 0 not checked. [2022-04-06 21:16:42,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:16:52,355 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 146 proven. 3 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2022-04-06 21:16:52,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:16:52,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210993959] [2022-04-06 21:16:52,355 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:16:52,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966995790] [2022-04-06 21:16:52,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966995790] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:16:52,356 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:16:52,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11] total 24 [2022-04-06 21:16:52,356 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:16:52,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [93451490] [2022-04-06 21:16:52,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [93451490] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:16:52,356 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:16:52,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 21:16:52,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548101995] [2022-04-06 21:16:52,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:16:52,358 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 21:16:52,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:16:52,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 21:16:52,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=437, Unknown=5, NotChecked=0, Total=552 [2022-04-06 21:16:52,358 INFO L87 Difference]: Start difference. First operand 441 states and 533 transitions. Second operand has 17 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 8 states have call predecessors, (14), 6 states have call successors, (14) [2022-04-06 21:16:55,717 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:16:59,814 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:17:01,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:17:01,630 INFO L93 Difference]: Finished difference Result 499 states and 623 transitions. [2022-04-06 21:17:01,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 21:17:01,630 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 8 states have call predecessors, (14), 6 states have call successors, (14) Word has length 104 [2022-04-06 21:17:01,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:17:01,632 INFO L225 Difference]: With dead ends: 499 [2022-04-06 21:17:01,632 INFO L226 Difference]: Without dead ends: 489 [2022-04-06 21:17:01,633 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 184 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 35.6s TimeCoverageRelationStatistics Valid=128, Invalid=569, Unknown=5, NotChecked=0, Total=702 [2022-04-06 21:17:01,633 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 28 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 29 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:17:01,633 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 180 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 574 Invalid, 2 Unknown, 15 Unchecked, 7.1s Time] [2022-04-06 21:17:01,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2022-04-06 21:17:01,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 452. [2022-04-06 21:17:01,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 277 states have (on average 1.144404332129964) internal successors, (317), 283 states have internal predecessors, (317), 117 states have call successors, (117), 59 states have call predecessors, (117), 57 states have return successors, (115), 109 states have call predecessors, (115), 115 states have call successors, (115) [2022-04-06 21:17:01,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 549 transitions. [2022-04-06 21:17:01,764 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 549 transitions. Word has length 104 [2022-04-06 21:17:01,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:17:01,765 INFO L478 AbstractCegarLoop]: Abstraction has 452 states and 549 transitions. [2022-04-06 21:17:01,765 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 8 states have call predecessors, (14), 6 states have call successors, (14) [2022-04-06 21:17:01,765 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 549 transitions. [2022-04-06 21:17:01,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-04-06 21:17:01,766 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:17:01,766 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:17:01,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-04-06 21:17:01,973 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,SelfDestructingSolverStorable30 [2022-04-06 21:17:01,973 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:17:01,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:17:01,973 INFO L85 PathProgramCache]: Analyzing trace with hash -468949743, now seen corresponding path program 37 times [2022-04-06 21:17:01,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:17:01,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1293318969] [2022-04-06 21:17:01,974 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:17:01,974 INFO L85 PathProgramCache]: Analyzing trace with hash -468949743, now seen corresponding path program 38 times [2022-04-06 21:17:01,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:17:01,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789780904] [2022-04-06 21:17:01,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:17:01,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:17:01,979 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:17:01,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1704680974] [2022-04-06 21:17:01,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:17:01,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:17:01,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:17:01,981 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:17:01,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-04-06 21:17:02,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:17:02,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:17:02,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 56 conjunts are in the unsatisfiable core [2022-04-06 21:17:02,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:17:02,736 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 76 proven. 103 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2022-04-06 21:17:02,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:17:03,083 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 111 proven. 28 refuted. 0 times theorem prover too weak. 309 trivial. 0 not checked. [2022-04-06 21:17:03,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:17:03,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789780904] [2022-04-06 21:17:03,084 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:17:03,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704680974] [2022-04-06 21:17:03,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704680974] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:17:03,084 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:17:03,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2022-04-06 21:17:03,084 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:17:03,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1293318969] [2022-04-06 21:17:03,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1293318969] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:17:03,085 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:17:03,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 21:17:03,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666028062] [2022-04-06 21:17:03,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:17:03,085 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 21:17:03,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:17:03,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 21:17:03,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-04-06 21:17:03,086 INFO L87 Difference]: Start difference. First operand 452 states and 549 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) [2022-04-06 21:17:05,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:17:05,432 INFO L93 Difference]: Finished difference Result 474 states and 583 transitions. [2022-04-06 21:17:05,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 21:17:05,433 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) Word has length 104 [2022-04-06 21:17:05,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:17:05,435 INFO L225 Difference]: With dead ends: 474 [2022-04-06 21:17:05,435 INFO L226 Difference]: Without dead ends: 468 [2022-04-06 21:17:05,436 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 190 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-04-06 21:17:05,437 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 14 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-04-06 21:17:05,437 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 207 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-04-06 21:17:05,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2022-04-06 21:17:05,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 468. [2022-04-06 21:17:05,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 286 states have (on average 1.1468531468531469) internal successors, (328), 292 states have internal predecessors, (328), 123 states have call successors, (123), 60 states have call predecessors, (123), 58 states have return successors, (121), 115 states have call predecessors, (121), 121 states have call successors, (121) [2022-04-06 21:17:05,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 572 transitions. [2022-04-06 21:17:05,588 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 572 transitions. Word has length 104 [2022-04-06 21:17:05,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:17:05,588 INFO L478 AbstractCegarLoop]: Abstraction has 468 states and 572 transitions. [2022-04-06 21:17:05,588 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) [2022-04-06 21:17:05,588 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 572 transitions. [2022-04-06 21:17:05,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-04-06 21:17:05,590 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:17:05,590 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:17:05,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-04-06 21:17:05,815 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:17:05,816 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:17:05,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:17:05,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1582034255, now seen corresponding path program 39 times [2022-04-06 21:17:05,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:17:05,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [523208525] [2022-04-06 21:17:05,817 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:17:05,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1582034255, now seen corresponding path program 40 times [2022-04-06 21:17:05,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:17:05,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872678598] [2022-04-06 21:17:05,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:17:05,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:17:05,823 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:17:05,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [699399140] [2022-04-06 21:17:05,823 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:17:05,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:17:05,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:17:05,833 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:17:05,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-04-06 21:17:05,919 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:17:05,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:17:05,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 64 conjunts are in the unsatisfiable core [2022-04-06 21:17:05,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:17:06,476 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 107 proven. 108 refuted. 0 times theorem prover too weak. 233 trivial. 0 not checked. [2022-04-06 21:17:06,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:17:06,747 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 117 proven. 5 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2022-04-06 21:17:06,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:17:06,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872678598] [2022-04-06 21:17:06,747 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:17:06,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699399140] [2022-04-06 21:17:06,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699399140] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:17:06,748 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:17:06,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 15 [2022-04-06 21:17:06,748 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:17:06,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [523208525] [2022-04-06 21:17:06,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [523208525] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:17:06,748 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:17:06,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 21:17:06,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132981039] [2022-04-06 21:17:06,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:17:06,748 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 21:17:06,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:17:06,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 21:17:06,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-04-06 21:17:06,749 INFO L87 Difference]: Start difference. First operand 468 states and 572 transitions. Second operand has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2022-04-06 21:17:07,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:17:07,567 INFO L93 Difference]: Finished difference Result 506 states and 622 transitions. [2022-04-06 21:17:07,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 21:17:07,568 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) Word has length 104 [2022-04-06 21:17:07,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:17:07,570 INFO L225 Difference]: With dead ends: 506 [2022-04-06 21:17:07,570 INFO L226 Difference]: Without dead ends: 496 [2022-04-06 21:17:07,571 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 189 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-04-06 21:17:07,571 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 19 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 21:17:07,571 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 211 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 668 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 21:17:07,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2022-04-06 21:17:07,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 483. [2022-04-06 21:17:07,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 296 states have (on average 1.1418918918918919) internal successors, (338), 303 states have internal predecessors, (338), 125 states have call successors, (125), 63 states have call predecessors, (125), 61 states have return successors, (123), 116 states have call predecessors, (123), 123 states have call successors, (123) [2022-04-06 21:17:07,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 586 transitions. [2022-04-06 21:17:07,758 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 586 transitions. Word has length 104 [2022-04-06 21:17:07,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:17:07,758 INFO L478 AbstractCegarLoop]: Abstraction has 483 states and 586 transitions. [2022-04-06 21:17:07,758 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2022-04-06 21:17:07,758 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 586 transitions. [2022-04-06 21:17:07,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-04-06 21:17:07,760 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:17:07,760 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 6, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:17:07,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-04-06 21:17:07,970 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:17:07,970 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:17:07,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:17:07,970 INFO L85 PathProgramCache]: Analyzing trace with hash -567590240, now seen corresponding path program 11 times [2022-04-06 21:17:07,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:17:07,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1829419463] [2022-04-06 21:17:07,971 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:17:07,971 INFO L85 PathProgramCache]: Analyzing trace with hash -567590240, now seen corresponding path program 12 times [2022-04-06 21:17:07,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:17:07,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951893261] [2022-04-06 21:17:07,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:17:07,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:17:07,976 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:17:07,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1798557441] [2022-04-06 21:17:07,977 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:17:07,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:17:07,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:17:07,978 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:17:07,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-04-06 21:17:08,027 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 21:17:08,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:17:08,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 33 conjunts are in the unsatisfiable core [2022-04-06 21:17:08,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:17:08,355 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 123 proven. 20 refuted. 0 times theorem prover too weak. 448 trivial. 0 not checked. [2022-04-06 21:17:08,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:17:08,509 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:18:18,934 WARN L855 $PredicateComparison]: unable to prove that (forall ((v_main_~r~0_BEFORE_CALL_453 Int) (v_main_~p~0_BEFORE_CALL_447 Int) (v_main_~s~0_BEFORE_CALL_405 Int) (v_main_~q~0_BEFORE_CALL_420 Int)) (or (not (= (+ (* (+ (* (- 1) v_main_~s~0_BEFORE_CALL_405) v_main_~r~0_BEFORE_CALL_453) v_main_~q~0_BEFORE_CALL_420) 1) (* (+ v_main_~p~0_BEFORE_CALL_447 (* (- 1) v_main_~q~0_BEFORE_CALL_420)) v_main_~s~0_BEFORE_CALL_405))) (and (not (= |c___VERIFIER_assert_#in~cond| 0)) (let ((.cse0 (+ (* v_main_~r~0_BEFORE_CALL_453 v_main_~q~0_BEFORE_CALL_420) 1))) (or (= .cse0 0) (not (= |c___VERIFIER_assert_#in~cond| 1)) (= (mod .cse0 v_main_~s~0_BEFORE_CALL_405) 0)))))) is different from true [2022-04-06 21:19:23,103 WARN L855 $PredicateComparison]: unable to prove that (or (forall ((v_main_~r~0_BEFORE_CALL_453 Int) (v_main_~p~0_BEFORE_CALL_447 Int) (v_main_~s~0_BEFORE_CALL_405 Int) (v_main_~q~0_BEFORE_CALL_420 Int)) (or (not (= (+ (* (+ (* (- 1) v_main_~s~0_BEFORE_CALL_405) v_main_~r~0_BEFORE_CALL_453) v_main_~q~0_BEFORE_CALL_420) 1) (* (+ v_main_~p~0_BEFORE_CALL_447 (* (- 1) v_main_~q~0_BEFORE_CALL_420)) v_main_~s~0_BEFORE_CALL_405))) (and (not (= |c___VERIFIER_assert_#in~cond| 0)) (let ((.cse0 (+ (* v_main_~r~0_BEFORE_CALL_453 v_main_~q~0_BEFORE_CALL_420) 1))) (or (= .cse0 0) (not (= |c___VERIFIER_assert_#in~cond| 1)) (= (mod .cse0 v_main_~s~0_BEFORE_CALL_405) 0)))))) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-04-06 21:19:41,146 WARN L855 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 1)) (forall ((v_main_~r~0_BEFORE_CALL_453 Int) (v_main_~p~0_BEFORE_CALL_447 Int) (v_main_~s~0_BEFORE_CALL_405 Int) (v_main_~q~0_BEFORE_CALL_420 Int)) (let ((.cse0 (+ (* v_main_~r~0_BEFORE_CALL_453 v_main_~q~0_BEFORE_CALL_420) 1))) (or (= .cse0 0) (= (mod .cse0 v_main_~s~0_BEFORE_CALL_405) 0) (not (= (+ (* (+ (* (- 1) v_main_~s~0_BEFORE_CALL_405) v_main_~r~0_BEFORE_CALL_453) v_main_~q~0_BEFORE_CALL_420) 1) (* (+ v_main_~p~0_BEFORE_CALL_447 (* (- 1) v_main_~q~0_BEFORE_CALL_420)) v_main_~s~0_BEFORE_CALL_405))))))) is different from true [2022-04-06 21:19:48,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:19:48,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951893261] [2022-04-06 21:19:48,189 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:19:48,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798557441] [2022-04-06 21:19:48,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798557441] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:19:48,189 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 21:19:48,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-04-06 21:19:48,189 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:19:48,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1829419463] [2022-04-06 21:19:48,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1829419463] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:19:48,189 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:19:48,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 21:19:48,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499885111] [2022-04-06 21:19:48,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:19:48,190 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 21:19:48,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:19:48,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 21:19:48,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=193, Unknown=6, NotChecked=90, Total=342 [2022-04-06 21:19:48,191 INFO L87 Difference]: Start difference. First operand 483 states and 586 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-04-06 21:19:48,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:19:48,750 INFO L93 Difference]: Finished difference Result 538 states and 658 transitions. [2022-04-06 21:19:48,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 21:19:48,751 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 117 [2022-04-06 21:19:48,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:19:48,753 INFO L225 Difference]: With dead ends: 538 [2022-04-06 21:19:48,753 INFO L226 Difference]: Without dead ends: 536 [2022-04-06 21:19:48,754 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=77, Invalid=271, Unknown=6, NotChecked=108, Total=462 [2022-04-06 21:19:48,754 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 19 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 21:19:48,755 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 142 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 21:19:48,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2022-04-06 21:19:48,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 512. [2022-04-06 21:19:48,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 315 states have (on average 1.1492063492063491) internal successors, (362), 320 states have internal predecessors, (362), 131 states have call successors, (131), 67 states have call predecessors, (131), 65 states have return successors, (129), 124 states have call predecessors, (129), 129 states have call successors, (129) [2022-04-06 21:19:48,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 622 transitions. [2022-04-06 21:19:48,927 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 622 transitions. Word has length 117 [2022-04-06 21:19:48,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:19:48,927 INFO L478 AbstractCegarLoop]: Abstraction has 512 states and 622 transitions. [2022-04-06 21:19:48,928 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-04-06 21:19:48,928 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 622 transitions. [2022-04-06 21:19:48,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-04-06 21:19:48,929 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:19:48,930 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 6, 5, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:19:48,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-04-06 21:19:49,143 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,SelfDestructingSolverStorable33 [2022-04-06 21:19:49,143 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:19:49,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:19:49,144 INFO L85 PathProgramCache]: Analyzing trace with hash 818613154, now seen corresponding path program 41 times [2022-04-06 21:19:49,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:19:49,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1236258376] [2022-04-06 21:19:49,144 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:19:49,144 INFO L85 PathProgramCache]: Analyzing trace with hash 818613154, now seen corresponding path program 42 times [2022-04-06 21:19:49,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:19:49,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450880082] [2022-04-06 21:19:49,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:19:49,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:19:49,156 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:19:49,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [903035903] [2022-04-06 21:19:49,156 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:19:49,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:19:49,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:19:49,158 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:19:49,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-04-06 21:19:49,207 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 21:19:49,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:19:49,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 32 conjunts are in the unsatisfiable core [2022-04-06 21:19:49,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:19:49,561 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 73 proven. 43 refuted. 0 times theorem prover too weak. 475 trivial. 0 not checked. [2022-04-06 21:19:49,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:19:55,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:19:55,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450880082] [2022-04-06 21:19:55,238 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:19:55,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903035903] [2022-04-06 21:19:55,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903035903] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:19:55,238 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 21:19:55,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-04-06 21:19:55,238 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:19:55,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1236258376] [2022-04-06 21:19:55,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1236258376] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:19:55,238 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:19:55,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 21:19:55,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677901033] [2022-04-06 21:19:55,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:19:55,239 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 21:19:55,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:19:55,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 21:19:55,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=168, Unknown=2, NotChecked=0, Total=210 [2022-04-06 21:19:55,239 INFO L87 Difference]: Start difference. First operand 512 states and 622 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-04-06 21:19:57,645 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:19:59,648 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:20:01,652 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:20:03,654 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:20:05,659 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:20:07,662 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:20:08,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:20:08,152 INFO L93 Difference]: Finished difference Result 585 states and 725 transitions. [2022-04-06 21:20:08,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 21:20:08,153 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 117 [2022-04-06 21:20:08,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:20:08,155 INFO L225 Difference]: With dead ends: 585 [2022-04-06 21:20:08,155 INFO L226 Difference]: Without dead ends: 579 [2022-04-06 21:20:08,156 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=53, Invalid=217, Unknown=2, NotChecked=0, Total=272 [2022-04-06 21:20:08,156 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 15 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 8 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.7s IncrementalHoareTripleChecker+Time [2022-04-06 21:20:08,156 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 166 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 385 Invalid, 6 Unknown, 0 Unchecked, 12.7s Time] [2022-04-06 21:20:08,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2022-04-06 21:20:08,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 552. [2022-04-06 21:20:08,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 338 states have (on average 1.150887573964497) internal successors, (389), 345 states have internal predecessors, (389), 144 states have call successors, (144), 71 states have call predecessors, (144), 69 states have return successors, (142), 135 states have call predecessors, (142), 142 states have call successors, (142) [2022-04-06 21:20:08,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 675 transitions. [2022-04-06 21:20:08,352 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 675 transitions. Word has length 117 [2022-04-06 21:20:08,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:20:08,352 INFO L478 AbstractCegarLoop]: Abstraction has 552 states and 675 transitions. [2022-04-06 21:20:08,352 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-04-06 21:20:08,352 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 675 transitions. [2022-04-06 21:20:08,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-04-06 21:20:08,354 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:20:08,354 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 6, 5, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:20:08,372 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-04-06 21:20:08,560 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,SelfDestructingSolverStorable34 [2022-04-06 21:20:08,561 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:20:08,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:20:08,561 INFO L85 PathProgramCache]: Analyzing trace with hash -920678622, now seen corresponding path program 43 times [2022-04-06 21:20:08,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:20:08,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [574376700] [2022-04-06 21:20:08,561 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:20:08,562 INFO L85 PathProgramCache]: Analyzing trace with hash -920678622, now seen corresponding path program 44 times [2022-04-06 21:20:08,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:20:08,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835825072] [2022-04-06 21:20:08,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:20:08,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:20:08,568 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:20:08,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [478039468] [2022-04-06 21:20:08,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:20:08,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:20:08,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:20:08,570 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:20:08,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-04-06 21:20:08,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:20:08,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:20:08,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 79 conjunts are in the unsatisfiable core [2022-04-06 21:20:08,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:20:25,633 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 126 proven. 149 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-04-06 21:20:25,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:20:26,425 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 135 proven. 8 refuted. 0 times theorem prover too weak. 448 trivial. 0 not checked. [2022-04-06 21:20:26,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:20:26,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835825072] [2022-04-06 21:20:26,426 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:20:26,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478039468] [2022-04-06 21:20:26,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478039468] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:20:26,426 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:20:26,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9] total 21 [2022-04-06 21:20:26,426 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:20:26,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [574376700] [2022-04-06 21:20:26,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [574376700] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:20:26,427 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:20:26,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 21:20:26,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831529321] [2022-04-06 21:20:26,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:20:26,427 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 21:20:26,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:20:26,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 21:20:26,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=343, Unknown=3, NotChecked=0, Total=420 [2022-04-06 21:20:26,431 INFO L87 Difference]: Start difference. First operand 552 states and 675 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 14 states have internal predecessors, (35), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 9 states have call predecessors, (19), 8 states have call successors, (19) [2022-04-06 21:20:33,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:20:33,916 INFO L93 Difference]: Finished difference Result 582 states and 715 transitions. [2022-04-06 21:20:33,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 21:20:33,917 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 14 states have internal predecessors, (35), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 9 states have call predecessors, (19), 8 states have call successors, (19) Word has length 117 [2022-04-06 21:20:33,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:20:33,919 INFO L225 Difference]: With dead ends: 582 [2022-04-06 21:20:33,920 INFO L226 Difference]: Without dead ends: 580 [2022-04-06 21:20:33,920 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 209 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=92, Invalid=457, Unknown=3, NotChecked=0, Total=552 [2022-04-06 21:20:33,920 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 26 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 846 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2022-04-06 21:20:33,920 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 229 Invalid, 976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 846 Invalid, 0 Unknown, 90 Unchecked, 7.2s Time] [2022-04-06 21:20:33,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2022-04-06 21:20:34,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 562. [2022-04-06 21:20:34,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 344 states have (on average 1.1511627906976745) internal successors, (396), 351 states have internal predecessors, (396), 147 states have call successors, (147), 72 states have call predecessors, (147), 70 states have return successors, (145), 138 states have call predecessors, (145), 145 states have call successors, (145) [2022-04-06 21:20:34,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 688 transitions. [2022-04-06 21:20:34,129 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 688 transitions. Word has length 117 [2022-04-06 21:20:34,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:20:34,129 INFO L478 AbstractCegarLoop]: Abstraction has 562 states and 688 transitions. [2022-04-06 21:20:34,129 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 14 states have internal predecessors, (35), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 9 states have call predecessors, (19), 8 states have call successors, (19) [2022-04-06 21:20:34,130 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 688 transitions. [2022-04-06 21:20:34,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-04-06 21:20:34,131 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:20:34,131 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 6, 5, 5, 5, 5, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:20:34,156 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-04-06 21:20:34,347 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,SelfDestructingSolverStorable35 [2022-04-06 21:20:34,347 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:20:34,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:20:34,348 INFO L85 PathProgramCache]: Analyzing trace with hash 465524772, now seen corresponding path program 45 times [2022-04-06 21:20:34,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:20:34,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1336872120] [2022-04-06 21:20:34,348 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:20:34,348 INFO L85 PathProgramCache]: Analyzing trace with hash 465524772, now seen corresponding path program 46 times [2022-04-06 21:20:34,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:20:34,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362332383] [2022-04-06 21:20:34,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:20:34,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:20:34,353 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:20:34,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [697428753] [2022-04-06 21:20:34,354 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:20:34,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:20:34,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:20:34,355 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:20:34,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-04-06 21:20:34,411 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:20:34,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:20:34,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 71 conjunts are in the unsatisfiable core [2022-04-06 21:20:34,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:20:37,459 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 118 proven. 136 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2022-04-06 21:20:37,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:20:37,943 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 135 proven. 8 refuted. 0 times theorem prover too weak. 448 trivial. 0 not checked. [2022-04-06 21:20:37,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:20:37,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362332383] [2022-04-06 21:20:37,943 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:20:37,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697428753] [2022-04-06 21:20:37,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697428753] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:20:37,943 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:20:37,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9] total 21 [2022-04-06 21:20:37,944 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:20:37,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1336872120] [2022-04-06 21:20:37,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1336872120] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:20:37,944 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:20:37,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 21:20:37,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11264408] [2022-04-06 21:20:37,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:20:37,944 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 21:20:37,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:20:37,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 21:20:37,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-04-06 21:20:37,945 INFO L87 Difference]: Start difference. First operand 562 states and 688 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 15 states have internal predecessors, (35), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 9 states have call predecessors, (19), 9 states have call successors, (19) [2022-04-06 21:20:40,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:20:40,998 INFO L93 Difference]: Finished difference Result 592 states and 727 transitions. [2022-04-06 21:20:40,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 21:20:40,999 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 15 states have internal predecessors, (35), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 9 states have call predecessors, (19), 9 states have call successors, (19) Word has length 117 [2022-04-06 21:20:40,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:20:41,001 INFO L225 Difference]: With dead ends: 592 [2022-04-06 21:20:41,001 INFO L226 Difference]: Without dead ends: 590 [2022-04-06 21:20:41,002 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 211 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2022-04-06 21:20:41,002 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 25 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 1049 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 1082 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1049 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-04-06 21:20:41,002 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 277 Invalid, 1082 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1049 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-04-06 21:20:41,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2022-04-06 21:20:41,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 566. [2022-04-06 21:20:41,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 347 states have (on average 1.1498559077809798) internal successors, (399), 354 states have internal predecessors, (399), 147 states have call successors, (147), 73 states have call predecessors, (147), 71 states have return successors, (145), 138 states have call predecessors, (145), 145 states have call successors, (145) [2022-04-06 21:20:41,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 691 transitions. [2022-04-06 21:20:41,213 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 691 transitions. Word has length 117 [2022-04-06 21:20:41,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:20:41,214 INFO L478 AbstractCegarLoop]: Abstraction has 566 states and 691 transitions. [2022-04-06 21:20:41,214 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 15 states have internal predecessors, (35), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 9 states have call predecessors, (19), 9 states have call successors, (19) [2022-04-06 21:20:41,214 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 691 transitions. [2022-04-06 21:20:41,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-04-06 21:20:41,216 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:20:41,216 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 6, 5, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:20:41,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-04-06 21:20:41,431 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:20:41,431 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:20:41,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:20:41,432 INFO L85 PathProgramCache]: Analyzing trace with hash 2041197218, now seen corresponding path program 47 times [2022-04-06 21:20:41,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:20:41,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [587373276] [2022-04-06 21:20:41,432 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:20:41,432 INFO L85 PathProgramCache]: Analyzing trace with hash 2041197218, now seen corresponding path program 48 times [2022-04-06 21:20:41,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:20:41,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718185399] [2022-04-06 21:20:41,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:20:41,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:20:41,437 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:20:41,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [759760477] [2022-04-06 21:20:41,437 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:20:41,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:20:41,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:20:41,438 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:20:41,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-04-06 21:20:41,496 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 21:20:41,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:20:41,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-06 21:20:41,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:20:41,699 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 135 proven. 8 refuted. 0 times theorem prover too weak. 448 trivial. 0 not checked. [2022-04-06 21:20:41,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:20:41,908 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 135 proven. 8 refuted. 0 times theorem prover too weak. 448 trivial. 0 not checked. [2022-04-06 21:20:41,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:20:41,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718185399] [2022-04-06 21:20:41,909 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:20:41,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759760477] [2022-04-06 21:20:41,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759760477] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:20:41,909 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:20:41,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-04-06 21:20:41,910 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:20:41,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [587373276] [2022-04-06 21:20:41,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [587373276] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:20:41,910 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:20:41,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 21:20:41,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208087696] [2022-04-06 21:20:41,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:20:41,910 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 21:20:41,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:20:41,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 21:20:41,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-04-06 21:20:41,911 INFO L87 Difference]: Start difference. First operand 566 states and 691 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-04-06 21:20:42,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:20:42,404 INFO L93 Difference]: Finished difference Result 570 states and 694 transitions. [2022-04-06 21:20:42,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 21:20:42,405 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 117 [2022-04-06 21:20:42,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:20:42,405 INFO L225 Difference]: With dead ends: 570 [2022-04-06 21:20:42,405 INFO L226 Difference]: Without dead ends: 0 [2022-04-06 21:20:42,406 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 222 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-04-06 21:20:42,407 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 10 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 21:20:42,407 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 113 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 21:20:42,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-06 21:20:42,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-06 21:20:42,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-06 21:20:42,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-06 21:20:42,408 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 117 [2022-04-06 21:20:42,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:20:42,408 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-06 21:20:42,408 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-04-06 21:20:42,408 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-06 21:20:42,408 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-06 21:20:42,410 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-06 21:20:42,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-04-06 21:20:42,627 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-04-06 21:20:42,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.