/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loop-acceleration/array_4.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 12:59:51,006 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 12:59:51,007 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 12:59:51,032 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 12:59:51,069 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 12:59:51,069 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 12:59:51,072 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 12:59:51,073 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-03-20 12:59:51,081 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 12:59:51,081 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 12:59:51,084 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 12:59:51,084 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 12:59:51,084 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 12:59:51,084 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 12:59:51,084 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 12:59:51,084 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 12:59:51,084 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 12:59:51,085 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 12:59:51,085 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 12:59:51,085 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 12:59:51,085 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 12:59:51,085 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 12:59:51,086 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 12:59:51,086 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 12:59:51,086 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 12:59:51,086 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 12:59:51,086 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 12:59:51,086 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 12:59:51,086 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 12:59:51,086 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 12:59:51,086 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 12:59:51,086 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 12:59:51,086 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-20 12:59:51,086 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 12:59:51,261 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 12:59:51,278 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 12:59:51,280 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 12:59:51,281 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 12:59:51,281 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 12:59:51,282 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_4.i [2022-03-20 12:59:51,331 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb566755b/f23d856b5aae49128e53457449182725/FLAG6efebe604 [2022-03-20 12:59:51,697 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 12:59:51,698 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_4.i [2022-03-20 12:59:51,703 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb566755b/f23d856b5aae49128e53457449182725/FLAG6efebe604 [2022-03-20 12:59:51,712 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb566755b/f23d856b5aae49128e53457449182725 [2022-03-20 12:59:51,714 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 12:59:51,716 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 12:59:51,717 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 12:59:51,717 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 12:59:51,719 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 12:59:51,720 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 12:59:51" (1/1) ... [2022-03-20 12:59:51,721 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2440e68c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:59:51, skipping insertion in model container [2022-03-20 12:59:51,721 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 12:59:51" (1/1) ... [2022-03-20 12:59:51,725 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 12:59:51,746 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 12:59:51,841 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_4.i[848,861] [2022-03-20 12:59:51,850 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 12:59:51,854 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 12:59:51,861 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_4.i[848,861] [2022-03-20 12:59:51,864 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 12:59:51,871 INFO L208 MainTranslator]: Completed translation [2022-03-20 12:59:51,872 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:59:51 WrapperNode [2022-03-20 12:59:51,872 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 12:59:51,872 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 12:59:51,872 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 12:59:51,872 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 12:59:51,878 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:59:51" (1/1) ... [2022-03-20 12:59:51,879 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:59:51" (1/1) ... [2022-03-20 12:59:51,882 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:59:51" (1/1) ... [2022-03-20 12:59:51,883 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:59:51" (1/1) ... [2022-03-20 12:59:51,886 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:59:51" (1/1) ... [2022-03-20 12:59:51,888 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:59:51" (1/1) ... [2022-03-20 12:59:51,888 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:59:51" (1/1) ... [2022-03-20 12:59:51,889 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 12:59:51,890 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 12:59:51,890 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 12:59:51,890 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 12:59:51,894 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:59:51" (1/1) ... [2022-03-20 12:59:51,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 12:59:51,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:59:51,913 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 12:59:51,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 12:59:51,939 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 12:59:51,939 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 12:59:51,939 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 12:59:51,939 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 12:59:51,939 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 12:59:51,939 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 12:59:51,939 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 12:59:51,939 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-20 12:59:51,940 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-20 12:59:51,940 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 12:59:51,940 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 12:59:51,940 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 12:59:51,940 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 12:59:51,940 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 12:59:51,940 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-03-20 12:59:51,940 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 12:59:51,940 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 12:59:51,940 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 12:59:51,940 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 12:59:51,940 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 12:59:51,940 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 12:59:51,984 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 12:59:51,985 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 12:59:52,053 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 12:59:52,056 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 12:59:52,057 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-20 12:59:52,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 12:59:52 BoogieIcfgContainer [2022-03-20 12:59:52,058 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 12:59:52,059 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 12:59:52,059 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 12:59:52,061 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 12:59:52,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 12:59:51" (1/3) ... [2022-03-20 12:59:52,062 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23073f80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 12:59:52, skipping insertion in model container [2022-03-20 12:59:52,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:59:51" (2/3) ... [2022-03-20 12:59:52,062 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23073f80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 12:59:52, skipping insertion in model container [2022-03-20 12:59:52,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 12:59:52" (3/3) ... [2022-03-20 12:59:52,063 INFO L111 eAbstractionObserver]: Analyzing ICFG array_4.i [2022-03-20 12:59:52,066 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 12:59:52,066 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 12:59:52,099 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 12:59:52,105 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 12:59:52,105 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 12:59:52,115 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 12:59:52,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-20 12:59:52,138 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:59:52,138 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:59:52,138 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:59:52,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:59:52,158 INFO L85 PathProgramCache]: Analyzing trace with hash -615726646, now seen corresponding path program 1 times [2022-03-20 12:59:52,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:52,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [733516203] [2022-03-20 12:59:52,171 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 12:59:52,171 INFO L85 PathProgramCache]: Analyzing trace with hash -615726646, now seen corresponding path program 2 times [2022-03-20 12:59:52,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:59:52,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840288805] [2022-03-20 12:59:52,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:59:52,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:59:52,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:52,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:59:52,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:52,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:59:52,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:59:52,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840288805] [2022-03-20 12:59:52,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840288805] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:59:52,333 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:59:52,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 12:59:52,334 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:59:52,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [733516203] [2022-03-20 12:59:52,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [733516203] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:59:52,335 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:59:52,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 12:59:52,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440968024] [2022-03-20 12:59:52,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:59:52,338 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 12:59:52,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:52,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 12:59:52,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 12:59:52,368 INFO L87 Difference]: Start difference. First operand has 24 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:59:52,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:59:52,413 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2022-03-20 12:59:52,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 12:59:52,415 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-03-20 12:59:52,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:59:52,426 INFO L225 Difference]: With dead ends: 40 [2022-03-20 12:59:52,426 INFO L226 Difference]: Without dead ends: 17 [2022-03-20 12:59:52,430 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 12:59:52,435 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 16 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:59:52,436 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 27 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:59:52,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-03-20 12:59:52,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-03-20 12:59:52,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:59:52,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2022-03-20 12:59:52,466 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2022-03-20 12:59:52,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:59:52,467 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2022-03-20 12:59:52,467 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:59:52,467 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2022-03-20 12:59:52,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-20 12:59:52,468 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:59:52,468 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:59:52,469 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 12:59:52,469 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:59:52,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:59:52,469 INFO L85 PathProgramCache]: Analyzing trace with hash 238110415, now seen corresponding path program 1 times [2022-03-20 12:59:52,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:52,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [237523493] [2022-03-20 12:59:52,470 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 12:59:52,470 INFO L85 PathProgramCache]: Analyzing trace with hash 238110415, now seen corresponding path program 2 times [2022-03-20 12:59:52,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:59:52,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217436479] [2022-03-20 12:59:52,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:59:52,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:59:52,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:52,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:59:52,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:52,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:59:52,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:59:52,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217436479] [2022-03-20 12:59:52,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217436479] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:59:52,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:59:52,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:59:52,526 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:59:52,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [237523493] [2022-03-20 12:59:52,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [237523493] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:59:52,526 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:59:52,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:59:52,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418923107] [2022-03-20 12:59:52,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:59:52,527 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:59:52,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:52,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:59:52,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:59:52,528 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:59:52,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:59:52,556 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2022-03-20 12:59:52,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:59:52,556 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-03-20 12:59:52,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:59:52,558 INFO L225 Difference]: With dead ends: 32 [2022-03-20 12:59:52,558 INFO L226 Difference]: Without dead ends: 23 [2022-03-20 12:59:52,558 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 12:59:52,559 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 20 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:59:52,560 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 21 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:59:52,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-03-20 12:59:52,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2022-03-20 12:59:52,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:59:52,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-03-20 12:59:52,564 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 14 [2022-03-20 12:59:52,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:59:52,564 INFO L478 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-03-20 12:59:52,564 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:59:52,564 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-03-20 12:59:52,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-20 12:59:52,565 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:59:52,565 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:59:52,565 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 12:59:52,565 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:59:52,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:59:52,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1502803825, now seen corresponding path program 1 times [2022-03-20 12:59:52,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:52,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [4145905] [2022-03-20 12:59:52,576 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:59:52,576 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:59:52,576 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:59:52,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1502803825, now seen corresponding path program 2 times [2022-03-20 12:59:52,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:59:52,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278070040] [2022-03-20 12:59:52,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:59:52,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:59:52,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:52,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:59:52,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:52,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:59:52,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:59:52,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278070040] [2022-03-20 12:59:52,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278070040] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:59:52,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270399746] [2022-03-20 12:59:52,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:59:52,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:59:52,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:59:52,617 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:59:52,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 12:59:52,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-20 12:59:52,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:59:52,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 12:59:52,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:59:52,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 12:59:52,754 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 12:59:52,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270399746] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:59:52,755 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 12:59:52,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2022-03-20 12:59:52,755 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:59:52,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [4145905] [2022-03-20 12:59:52,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [4145905] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:59:52,756 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:59:52,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 12:59:52,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790038684] [2022-03-20 12:59:52,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:59:52,756 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 12:59:52,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:52,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 12:59:52,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-20 12:59:52,757 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:59:52,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:59:52,794 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2022-03-20 12:59:52,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 12:59:52,794 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-03-20 12:59:52,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:59:52,795 INFO L225 Difference]: With dead ends: 27 [2022-03-20 12:59:52,795 INFO L226 Difference]: Without dead ends: 22 [2022-03-20 12:59:52,795 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-20 12:59:52,796 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 3 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:59:52,797 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 47 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:59:52,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-03-20 12:59:52,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2022-03-20 12:59:52,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:59:52,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2022-03-20 12:59:52,800 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 16 [2022-03-20 12:59:52,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:59:52,800 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2022-03-20 12:59:52,801 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:59:52,801 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2022-03-20 12:59:52,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-20 12:59:52,801 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:59:52,801 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:59:52,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 12:59:53,002 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:59:53,003 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:59:53,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:59:53,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1018715970, now seen corresponding path program 1 times [2022-03-20 12:59:53,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:53,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1613838201] [2022-03-20 12:59:53,005 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:59:53,005 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:59:53,006 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:59:53,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1018715970, now seen corresponding path program 2 times [2022-03-20 12:59:53,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:59:53,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901136462] [2022-03-20 12:59:53,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:59:53,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:59:53,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:53,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:59:53,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:53,044 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-20 12:59:53,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:59:53,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901136462] [2022-03-20 12:59:53,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901136462] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:59:53,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030009786] [2022-03-20 12:59:53,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:59:53,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:59:53,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:59:53,063 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:59:53,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 12:59:53,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:59:53,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:59:53,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-20 12:59:53,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:59:53,164 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-20 12:59:53,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:59:53,216 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-20 12:59:53,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030009786] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:59:53,217 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:59:53,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-20 12:59:53,217 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:59:53,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1613838201] [2022-03-20 12:59:53,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1613838201] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:59:53,225 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:59:53,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 12:59:53,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125286249] [2022-03-20 12:59:53,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:59:53,225 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 12:59:53,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:53,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 12:59:53,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-20 12:59:53,229 INFO L87 Difference]: Start difference. First operand 20 states and 21 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, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:59:53,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:59:53,285 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2022-03-20 12:59:53,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 12:59:53,286 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, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-03-20 12:59:53,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:59:53,287 INFO L225 Difference]: With dead ends: 39 [2022-03-20 12:59:53,287 INFO L226 Difference]: Without dead ends: 28 [2022-03-20 12:59:53,289 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-03-20 12:59:53,299 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 28 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:59:53,300 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 21 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:59:53,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-03-20 12:59:53,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2022-03-20 12:59:53,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:59:53,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2022-03-20 12:59:53,306 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 19 [2022-03-20 12:59:53,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:59:53,307 INFO L478 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2022-03-20 12:59:53,307 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, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:59:53,307 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2022-03-20 12:59:53,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-20 12:59:53,307 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:59:53,307 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:59:53,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 12:59:53,518 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-20 12:59:53,518 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:59:53,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:59:53,519 INFO L85 PathProgramCache]: Analyzing trace with hash -706411172, now seen corresponding path program 3 times [2022-03-20 12:59:53,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:53,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [574503747] [2022-03-20 12:59:53,520 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:59:53,521 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:59:53,521 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:59:53,521 INFO L85 PathProgramCache]: Analyzing trace with hash -706411172, now seen corresponding path program 4 times [2022-03-20 12:59:53,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:59:53,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576995328] [2022-03-20 12:59:53,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:59:53,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:59:53,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:53,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:59:53,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:53,602 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 12:59:53,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:59:53,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576995328] [2022-03-20 12:59:53,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576995328] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:59:53,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855509798] [2022-03-20 12:59:53,603 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:59:53,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:59:53,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:59:53,604 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:59:53,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 12:59:53,639 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:59:53,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:59:53,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 12:59:53,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:59:53,687 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-20 12:59:53,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:59:53,736 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-20 12:59:53,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855509798] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:59:53,736 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:59:53,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2022-03-20 12:59:53,736 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:59:53,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [574503747] [2022-03-20 12:59:53,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [574503747] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:59:53,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:59:53,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 12:59:53,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78159913] [2022-03-20 12:59:53,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:59:53,737 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 12:59:53,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:53,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 12:59:53,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-03-20 12:59:53,738 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:59:53,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:59:53,805 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2022-03-20 12:59:53,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 12:59:53,805 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-03-20 12:59:53,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:59:53,807 INFO L225 Difference]: With dead ends: 32 [2022-03-20 12:59:53,807 INFO L226 Difference]: Without dead ends: 27 [2022-03-20 12:59:53,808 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2022-03-20 12:59:53,809 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 26 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:59:53,810 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 30 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:59:53,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-20 12:59:53,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2022-03-20 12:59:53,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:59:53,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2022-03-20 12:59:53,813 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 21 [2022-03-20 12:59:53,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:59:53,813 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2022-03-20 12:59:53,813 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:59:53,813 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2022-03-20 12:59:53,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-20 12:59:53,814 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:59:53,814 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:59:53,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 12:59:54,022 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:59:54,023 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:59:54,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:59:54,023 INFO L85 PathProgramCache]: Analyzing trace with hash 336152307, now seen corresponding path program 5 times [2022-03-20 12:59:54,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:54,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [484037021] [2022-03-20 12:59:54,026 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:59:54,026 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:59:54,026 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:59:54,026 INFO L85 PathProgramCache]: Analyzing trace with hash 336152307, now seen corresponding path program 6 times [2022-03-20 12:59:54,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:59:54,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020827125] [2022-03-20 12:59:54,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:59:54,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:59:54,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:54,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:59:54,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:54,081 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 12:59:54,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:59:54,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020827125] [2022-03-20 12:59:54,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020827125] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:59:54,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800344583] [2022-03-20 12:59:54,082 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:59:54,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:59:54,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:59:54,083 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:59:54,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 12:59:54,118 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-20 12:59:54,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:59:54,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 12:59:54,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:59:54,169 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 12:59:54,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:59:54,225 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 12:59:54,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800344583] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:59:54,225 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:59:54,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2022-03-20 12:59:54,225 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:59:54,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [484037021] [2022-03-20 12:59:54,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [484037021] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:59:54,225 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:59:54,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 12:59:54,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933388530] [2022-03-20 12:59:54,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:59:54,226 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 12:59:54,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:54,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 12:59:54,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-03-20 12:59:54,226 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:59:54,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:59:54,276 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2022-03-20 12:59:54,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 12:59:54,277 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-03-20 12:59:54,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:59:54,277 INFO L225 Difference]: With dead ends: 47 [2022-03-20 12:59:54,277 INFO L226 Difference]: Without dead ends: 33 [2022-03-20 12:59:54,277 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2022-03-20 12:59:54,278 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 34 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:59:54,278 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 26 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:59:54,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-20 12:59:54,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 27. [2022-03-20 12:59:54,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:59:54,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2022-03-20 12:59:54,282 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2022-03-20 12:59:54,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:59:54,282 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2022-03-20 12:59:54,282 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:59:54,282 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2022-03-20 12:59:54,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-20 12:59:54,283 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:59:54,283 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:59:54,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 12:59:54,501 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:59:54,501 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:59:54,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:59:54,503 INFO L85 PathProgramCache]: Analyzing trace with hash -842525419, now seen corresponding path program 7 times [2022-03-20 12:59:54,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:54,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1630926603] [2022-03-20 12:59:54,505 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:59:54,505 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:59:54,505 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:59:54,505 INFO L85 PathProgramCache]: Analyzing trace with hash -842525419, now seen corresponding path program 8 times [2022-03-20 12:59:54,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:59:54,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133427192] [2022-03-20 12:59:54,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:59:54,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:59:54,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:54,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:59:54,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:54,575 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 12:59:54,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:59:54,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133427192] [2022-03-20 12:59:54,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133427192] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:59:54,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985103739] [2022-03-20 12:59:54,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:59:54,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:59:54,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:59:54,577 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:59:54,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 12:59:54,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:59:54,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:59:54,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 12:59:54,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:59:54,667 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-20 12:59:54,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:59:54,737 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-20 12:59:54,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985103739] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:59:54,737 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:59:54,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-03-20 12:59:54,737 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:59:54,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1630926603] [2022-03-20 12:59:54,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1630926603] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:59:54,738 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:59:54,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 12:59:54,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610793785] [2022-03-20 12:59:54,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:59:54,738 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 12:59:54,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:54,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 12:59:54,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-03-20 12:59:54,739 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:59:54,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:59:54,803 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2022-03-20 12:59:54,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 12:59:54,804 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-03-20 12:59:54,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:59:54,805 INFO L225 Difference]: With dead ends: 53 [2022-03-20 12:59:54,805 INFO L226 Difference]: Without dead ends: 39 [2022-03-20 12:59:54,805 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2022-03-20 12:59:54,805 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 49 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:59:54,806 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 21 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:59:54,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-03-20 12:59:54,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 29. [2022-03-20 12:59:54,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:59:54,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2022-03-20 12:59:54,810 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2022-03-20 12:59:54,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:59:54,810 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2022-03-20 12:59:54,811 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:59:54,811 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2022-03-20 12:59:54,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 12:59:54,811 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:59:54,811 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:59:54,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 12:59:55,027 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:59:55,028 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:59:55,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:59:55,028 INFO L85 PathProgramCache]: Analyzing trace with hash 319546039, now seen corresponding path program 9 times [2022-03-20 12:59:55,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:55,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1576199524] [2022-03-20 12:59:55,030 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:59:55,030 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:59:55,030 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:59:55,030 INFO L85 PathProgramCache]: Analyzing trace with hash 319546039, now seen corresponding path program 10 times [2022-03-20 12:59:55,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:59:55,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28847756] [2022-03-20 12:59:55,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:59:55,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:59:55,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:55,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:59:55,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:55,089 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 12:59:55,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:59:55,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28847756] [2022-03-20 12:59:55,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28847756] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:59:55,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217808481] [2022-03-20 12:59:55,090 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:59:55,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:59:55,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:59:55,091 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:59:55,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 12:59:55,131 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:59:55,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:59:55,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 12:59:55,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:59:55,169 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 12:59:55,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:59:55,236 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 12:59:55,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217808481] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:59:55,236 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:59:55,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-03-20 12:59:55,237 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:59:55,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1576199524] [2022-03-20 12:59:55,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1576199524] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:59:55,237 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:59:55,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 12:59:55,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767325637] [2022-03-20 12:59:55,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:59:55,237 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 12:59:55,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:55,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 12:59:55,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-03-20 12:59:55,238 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:59:55,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:59:55,322 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2022-03-20 12:59:55,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 12:59:55,323 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-03-20 12:59:55,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:59:55,323 INFO L225 Difference]: With dead ends: 59 [2022-03-20 12:59:55,323 INFO L226 Difference]: Without dead ends: 45 [2022-03-20 12:59:55,324 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=146, Invalid=196, Unknown=0, NotChecked=0, Total=342 [2022-03-20 12:59:55,324 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 50 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:59:55,324 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 36 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:59:55,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-20 12:59:55,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 31. [2022-03-20 12:59:55,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:59:55,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2022-03-20 12:59:55,329 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 28 [2022-03-20 12:59:55,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:59:55,329 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2022-03-20 12:59:55,329 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:59:55,329 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2022-03-20 12:59:55,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-20 12:59:55,330 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:59:55,330 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:59:55,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 12:59:55,543 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:59:55,543 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:59:55,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:59:55,544 INFO L85 PathProgramCache]: Analyzing trace with hash 378720217, now seen corresponding path program 11 times [2022-03-20 12:59:55,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:55,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [856281120] [2022-03-20 12:59:55,545 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:59:55,545 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:59:55,545 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:59:55,545 INFO L85 PathProgramCache]: Analyzing trace with hash 378720217, now seen corresponding path program 12 times [2022-03-20 12:59:55,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:59:55,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783780403] [2022-03-20 12:59:55,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:59:55,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:59:55,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:55,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:59:55,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:55,591 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 12:59:55,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:59:55,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783780403] [2022-03-20 12:59:55,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783780403] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:59:55,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550376166] [2022-03-20 12:59:55,591 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:59:55,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:59:55,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:59:55,592 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:59:55,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 12:59:55,633 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 12:59:55,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:59:55,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 12:59:55,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:59:55,684 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-20 12:59:55,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:59:55,773 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-20 12:59:55,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550376166] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:59:55,773 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:59:55,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 15 [2022-03-20 12:59:55,775 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:59:55,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [856281120] [2022-03-20 12:59:55,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [856281120] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:59:55,775 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:59:55,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 12:59:55,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738130034] [2022-03-20 12:59:55,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:59:55,776 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 12:59:55,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:55,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 12:59:55,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2022-03-20 12:59:55,777 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:59:55,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:59:55,887 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2022-03-20 12:59:55,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 12:59:55,888 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-03-20 12:59:55,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:59:55,888 INFO L225 Difference]: With dead ends: 65 [2022-03-20 12:59:55,888 INFO L226 Difference]: Without dead ends: 51 [2022-03-20 12:59:55,889 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2022-03-20 12:59:55,889 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 67 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:59:55,889 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 31 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:59:55,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-20 12:59:55,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 33. [2022-03-20 12:59:55,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:59:55,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2022-03-20 12:59:55,894 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2022-03-20 12:59:55,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:59:55,894 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2022-03-20 12:59:55,894 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:59:55,894 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2022-03-20 12:59:55,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-20 12:59:55,895 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:59:55,895 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:59:55,911 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-20 12:59:56,107 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:59:56,108 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:59:56,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:59:56,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1410530427, now seen corresponding path program 13 times [2022-03-20 12:59:56,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:56,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1327674712] [2022-03-20 12:59:56,109 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:59:56,110 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:59:56,110 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:59:56,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1410530427, now seen corresponding path program 14 times [2022-03-20 12:59:56,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:59:56,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451032121] [2022-03-20 12:59:56,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:59:56,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:59:56,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:56,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:59:56,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:56,163 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 12:59:56,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:59:56,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451032121] [2022-03-20 12:59:56,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451032121] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:59:56,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555224241] [2022-03-20 12:59:56,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:59:56,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:59:56,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:59:56,165 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:59:56,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 12:59:56,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:59:56,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:59:56,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-20 12:59:56,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:59:56,250 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 12:59:56,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:59:56,349 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 12:59:56,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555224241] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:59:56,349 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:59:56,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-03-20 12:59:56,350 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:59:56,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1327674712] [2022-03-20 12:59:56,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1327674712] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:59:56,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:59:56,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 12:59:56,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058121071] [2022-03-20 12:59:56,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:59:56,350 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 12:59:56,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:56,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 12:59:56,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-03-20 12:59:56,351 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:59:56,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:59:56,457 INFO L93 Difference]: Finished difference Result 71 states and 78 transitions. [2022-03-20 12:59:56,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 12:59:56,457 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-03-20 12:59:56,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:59:56,458 INFO L225 Difference]: With dead ends: 71 [2022-03-20 12:59:56,458 INFO L226 Difference]: Without dead ends: 57 [2022-03-20 12:59:56,458 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2022-03-20 12:59:56,458 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 84 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:59:56,459 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 26 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:59:56,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-03-20 12:59:56,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 35. [2022-03-20 12:59:56,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 30 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:59:56,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2022-03-20 12:59:56,463 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2022-03-20 12:59:56,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:59:56,463 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2022-03-20 12:59:56,463 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:59:56,464 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2022-03-20 12:59:56,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-20 12:59:56,464 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:59:56,464 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:59:56,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 12:59:56,683 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-20 12:59:56,684 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:59:56,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:59:56,684 INFO L85 PathProgramCache]: Analyzing trace with hash 842696861, now seen corresponding path program 15 times [2022-03-20 12:59:56,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:56,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1144329991] [2022-03-20 12:59:56,685 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:59:56,685 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:59:56,685 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:59:56,685 INFO L85 PathProgramCache]: Analyzing trace with hash 842696861, now seen corresponding path program 16 times [2022-03-20 12:59:56,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:59:56,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632299302] [2022-03-20 12:59:56,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:59:56,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:59:56,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:56,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:59:56,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:56,747 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 12:59:56,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:59:56,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632299302] [2022-03-20 12:59:56,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632299302] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:59:56,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038133199] [2022-03-20 12:59:56,748 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:59:56,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:59:56,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:59:56,749 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:59:56,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 12:59:56,791 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:59:56,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:59:56,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 12:59:56,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:59:56,843 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 12:59:56,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:59:56,962 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 12:59:56,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038133199] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:59:56,962 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:59:56,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 20 [2022-03-20 12:59:56,962 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:59:56,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1144329991] [2022-03-20 12:59:56,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1144329991] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:59:56,962 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:59:56,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 12:59:56,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257473486] [2022-03-20 12:59:56,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:59:56,963 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 12:59:56,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:56,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 12:59:56,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2022-03-20 12:59:56,963 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:59:57,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:59:57,080 INFO L93 Difference]: Finished difference Result 77 states and 85 transitions. [2022-03-20 12:59:57,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 12:59:57,080 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-03-20 12:59:57,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:59:57,080 INFO L225 Difference]: With dead ends: 77 [2022-03-20 12:59:57,081 INFO L226 Difference]: Without dead ends: 63 [2022-03-20 12:59:57,081 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=326, Invalid=430, Unknown=0, NotChecked=0, Total=756 [2022-03-20 12:59:57,081 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 107 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:59:57,082 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 26 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:59:57,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-03-20 12:59:57,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 37. [2022-03-20 12:59:57,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:59:57,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2022-03-20 12:59:57,086 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2022-03-20 12:59:57,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:59:57,086 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2022-03-20 12:59:57,086 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:59:57,086 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2022-03-20 12:59:57,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-20 12:59:57,087 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:59:57,087 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:59:57,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 12:59:57,303 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:59:57,303 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:59:57,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:59:57,304 INFO L85 PathProgramCache]: Analyzing trace with hash 615486527, now seen corresponding path program 17 times [2022-03-20 12:59:57,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:57,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1584952118] [2022-03-20 12:59:57,305 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:59:57,305 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:59:57,305 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:59:57,305 INFO L85 PathProgramCache]: Analyzing trace with hash 615486527, now seen corresponding path program 18 times [2022-03-20 12:59:57,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:59:57,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976984079] [2022-03-20 12:59:57,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:59:57,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:59:57,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:57,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:59:57,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:57,388 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 12:59:57,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:59:57,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976984079] [2022-03-20 12:59:57,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976984079] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:59:57,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522690921] [2022-03-20 12:59:57,388 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:59:57,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:59:57,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:59:57,389 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:59:57,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 12:59:57,433 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 12:59:57,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:59:57,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 12:59:57,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:59:57,489 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-20 12:59:57,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:59:57,559 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-20 12:59:57,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522690921] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:59:57,560 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:59:57,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 7] total 18 [2022-03-20 12:59:57,560 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:59:57,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1584952118] [2022-03-20 12:59:57,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1584952118] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:59:57,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:59:57,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 12:59:57,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394784077] [2022-03-20 12:59:57,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:59:57,560 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 12:59:57,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:57,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 12:59:57,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2022-03-20 12:59:57,561 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:59:57,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:59:57,700 INFO L93 Difference]: Finished difference Result 83 states and 92 transitions. [2022-03-20 12:59:57,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 12:59:57,700 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-03-20 12:59:57,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:59:57,701 INFO L225 Difference]: With dead ends: 83 [2022-03-20 12:59:57,701 INFO L226 Difference]: Without dead ends: 69 [2022-03-20 12:59:57,702 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=247, Invalid=455, Unknown=0, NotChecked=0, Total=702 [2022-03-20 12:59:57,702 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 121 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:59:57,702 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 26 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:59:57,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-03-20 12:59:57,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 39. [2022-03-20 12:59:57,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 34 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:59:57,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2022-03-20 12:59:57,707 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2022-03-20 12:59:57,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:59:57,707 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2022-03-20 12:59:57,707 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:59:57,707 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2022-03-20 12:59:57,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-20 12:59:57,707 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:59:57,708 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:59:57,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 12:59:57,919 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-20 12:59:57,919 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:59:57,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:59:57,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1309687649, now seen corresponding path program 19 times [2022-03-20 12:59:57,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:57,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1984299230] [2022-03-20 12:59:57,921 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:59:57,921 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:59:57,921 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:59:57,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1309687649, now seen corresponding path program 20 times [2022-03-20 12:59:57,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:59:57,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732014384] [2022-03-20 12:59:57,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:59:57,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:59:57,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:57,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:59:57,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:57,991 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 12:59:57,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:59:57,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732014384] [2022-03-20 12:59:57,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732014384] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:59:57,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305061293] [2022-03-20 12:59:57,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:59:57,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:59:57,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:59:57,992 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:59:57,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 12:59:58,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:59:58,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:59:58,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 12:59:58,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:59:58,117 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 12:59:58,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:59:58,276 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 12:59:58,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305061293] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:59:58,277 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:59:58,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 24 [2022-03-20 12:59:58,277 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:59:58,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1984299230] [2022-03-20 12:59:58,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1984299230] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:59:58,277 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:59:58,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 12:59:58,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912680416] [2022-03-20 12:59:58,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:59:58,277 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 12:59:58,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:58,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 12:59:58,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2022-03-20 12:59:58,278 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:59:58,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:59:58,423 INFO L93 Difference]: Finished difference Result 89 states and 99 transitions. [2022-03-20 12:59:58,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 12:59:58,424 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-03-20 12:59:58,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:59:58,424 INFO L225 Difference]: With dead ends: 89 [2022-03-20 12:59:58,424 INFO L226 Difference]: Without dead ends: 75 [2022-03-20 12:59:58,425 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=486, Invalid=636, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 12:59:58,425 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 128 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:59:58,425 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 26 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:59:58,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-03-20 12:59:58,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 41. [2022-03-20 12:59:58,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:59:58,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2022-03-20 12:59:58,430 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 38 [2022-03-20 12:59:58,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:59:58,430 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2022-03-20 12:59:58,430 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:59:58,430 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2022-03-20 12:59:58,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-20 12:59:58,431 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:59:58,431 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:59:58,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-20 12:59:58,652 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-20 12:59:58,652 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:59:58,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:59:58,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1577932285, now seen corresponding path program 21 times [2022-03-20 12:59:58,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:58,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1141302189] [2022-03-20 12:59:58,654 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:59:58,654 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:59:58,655 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:59:58,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1577932285, now seen corresponding path program 22 times [2022-03-20 12:59:58,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:59:58,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232537792] [2022-03-20 12:59:58,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:59:58,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:59:58,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:58,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:59:58,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:58,739 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 12:59:58,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:59:58,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232537792] [2022-03-20 12:59:58,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232537792] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:59:58,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983788526] [2022-03-20 12:59:58,740 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:59:58,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:59:58,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:59:58,741 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:59:58,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 12:59:58,791 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:59:58,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:59:58,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-20 12:59:58,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:59:58,845 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 12:59:58,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:59:59,015 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 12:59:59,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983788526] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:59:59,016 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:59:59,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-03-20 12:59:59,016 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:59:59,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1141302189] [2022-03-20 12:59:59,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1141302189] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:59:59,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:59:59,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 12:59:59,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103276124] [2022-03-20 12:59:59,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:59:59,016 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 12:59:59,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:59,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 12:59:59,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-03-20 12:59:59,017 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:59:59,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:59:59,203 INFO L93 Difference]: Finished difference Result 95 states and 106 transitions. [2022-03-20 12:59:59,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 12:59:59,203 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-03-20 12:59:59,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:59:59,204 INFO L225 Difference]: With dead ends: 95 [2022-03-20 12:59:59,204 INFO L226 Difference]: Without dead ends: 81 [2022-03-20 12:59:59,204 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=578, Invalid=754, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 12:59:59,205 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 129 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:59:59,205 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 41 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:59:59,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-03-20 12:59:59,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 43. [2022-03-20 12:59:59,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 38 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:59:59,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2022-03-20 12:59:59,210 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 40 [2022-03-20 12:59:59,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:59:59,210 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2022-03-20 12:59:59,210 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:59:59,210 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2022-03-20 12:59:59,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-20 12:59:59,211 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:59:59,211 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:59:59,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-20 12:59:59,431 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-20 12:59:59,439 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:59:59,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:59:59,439 INFO L85 PathProgramCache]: Analyzing trace with hash -2031815643, now seen corresponding path program 23 times [2022-03-20 12:59:59,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:59,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [36633106] [2022-03-20 12:59:59,440 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:59:59,440 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:59:59,441 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:59:59,441 INFO L85 PathProgramCache]: Analyzing trace with hash -2031815643, now seen corresponding path program 24 times [2022-03-20 12:59:59,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:59:59,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418883195] [2022-03-20 12:59:59,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:59:59,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:59:59,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:59,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:59:59,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:59,536 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 12:59:59,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:59:59,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418883195] [2022-03-20 12:59:59,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418883195] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:59:59,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697948234] [2022-03-20 12:59:59,536 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:59:59,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:59:59,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:59:59,538 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:59:59,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-20 12:59:59,595 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 12:59:59,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:59:59,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 12:59:59,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:59:59,665 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-03-20 12:59:59,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:59:59,760 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-03-20 12:59:59,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697948234] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:59:59,761 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:59:59,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7, 7] total 21 [2022-03-20 12:59:59,761 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:59:59,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [36633106] [2022-03-20 12:59:59,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [36633106] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:59:59,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:59:59,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 12:59:59,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432942406] [2022-03-20 12:59:59,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:59:59,761 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 12:59:59,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:59,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 12:59:59,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=261, Unknown=0, NotChecked=0, Total=420 [2022-03-20 12:59:59,762 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:59:59,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:59:59,965 INFO L93 Difference]: Finished difference Result 101 states and 113 transitions. [2022-03-20 12:59:59,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 12:59:59,965 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-03-20 12:59:59,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:59:59,966 INFO L225 Difference]: With dead ends: 101 [2022-03-20 12:59:59,966 INFO L226 Difference]: Without dead ends: 87 [2022-03-20 12:59:59,966 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=376, Invalid=680, Unknown=0, NotChecked=0, Total=1056 [2022-03-20 12:59:59,966 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 145 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:59:59,967 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 31 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:59:59,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-03-20 12:59:59,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 45. [2022-03-20 12:59:59,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.05) internal successors, (42), 40 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:59:59,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2022-03-20 12:59:59,973 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2022-03-20 12:59:59,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:59:59,973 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2022-03-20 12:59:59,973 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:59:59,973 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2022-03-20 12:59:59,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-20 12:59:59,973 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:59:59,973 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:59:59,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-20 13:00:00,181 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-20 13:00:00,182 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:00:00,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:00:00,182 INFO L85 PathProgramCache]: Analyzing trace with hash -127058489, now seen corresponding path program 25 times [2022-03-20 13:00:00,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:00,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2132733763] [2022-03-20 13:00:00,184 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:00:00,184 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:00:00,184 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:00:00,184 INFO L85 PathProgramCache]: Analyzing trace with hash -127058489, now seen corresponding path program 26 times [2022-03-20 13:00:00,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:00:00,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489820595] [2022-03-20 13:00:00,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:00:00,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:00:00,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:00,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:00:00,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:00,282 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:00:00,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:00:00,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489820595] [2022-03-20 13:00:00,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489820595] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:00:00,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094399071] [2022-03-20 13:00:00,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:00:00,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:00:00,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:00:00,283 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:00:00,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-20 13:00:00,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:00:00,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:00:00,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 13:00:00,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:00:00,416 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:00:00,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:00:00,632 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:00:00,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094399071] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:00:00,632 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:00:00,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 30 [2022-03-20 13:00:00,633 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:00:00,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2132733763] [2022-03-20 13:00:00,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2132733763] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:00:00,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:00:00,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 13:00:00,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326521655] [2022-03-20 13:00:00,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:00:00,633 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 13:00:00,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:00,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 13:00:00,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2022-03-20 13:00:00,634 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 15 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:00,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:00:00,877 INFO L93 Difference]: Finished difference Result 107 states and 120 transitions. [2022-03-20 13:00:00,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 13:00:00,878 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 15 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-03-20 13:00:00,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:00:00,878 INFO L225 Difference]: With dead ends: 107 [2022-03-20 13:00:00,878 INFO L226 Difference]: Without dead ends: 93 [2022-03-20 13:00:00,879 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=786, Invalid=1020, Unknown=0, NotChecked=0, Total=1806 [2022-03-20 13:00:00,880 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 156 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:00:00,880 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 31 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:00:00,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-03-20 13:00:00,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 47. [2022-03-20 13:00:00,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 42 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:00,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2022-03-20 13:00:00,891 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 44 [2022-03-20 13:00:00,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:00:00,891 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2022-03-20 13:00:00,891 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 15 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:00,891 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2022-03-20 13:00:00,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-20 13:00:00,891 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:00:00,892 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:00:00,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-20 13:00:01,107 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:00:01,107 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:00:01,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:00:01,108 INFO L85 PathProgramCache]: Analyzing trace with hash 688498409, now seen corresponding path program 27 times [2022-03-20 13:00:01,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:01,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1776434747] [2022-03-20 13:00:01,109 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:00:01,109 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:00:01,109 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:00:01,109 INFO L85 PathProgramCache]: Analyzing trace with hash 688498409, now seen corresponding path program 28 times [2022-03-20 13:00:01,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:00:01,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347600178] [2022-03-20 13:00:01,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:00:01,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:00:01,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:01,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:00:01,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:01,250 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:00:01,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:00:01,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347600178] [2022-03-20 13:00:01,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347600178] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:00:01,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049594197] [2022-03-20 13:00:01,251 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:00:01,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:00:01,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:00:01,252 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:00:01,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-20 13:00:01,308 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:00:01,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:00:01,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 13:00:01,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:00:01,383 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:00:01,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:00:01,640 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:00:01,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049594197] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:00:01,640 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:00:01,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 32 [2022-03-20 13:00:01,641 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:00:01,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1776434747] [2022-03-20 13:00:01,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1776434747] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:00:01,641 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:00:01,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 13:00:01,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856367692] [2022-03-20 13:00:01,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:00:01,641 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 13:00:01,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:01,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 13:00:01,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2022-03-20 13:00:01,642 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:01,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:00:01,906 INFO L93 Difference]: Finished difference Result 113 states and 127 transitions. [2022-03-20 13:00:01,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 13:00:01,906 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-03-20 13:00:01,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:00:01,907 INFO L225 Difference]: With dead ends: 113 [2022-03-20 13:00:01,907 INFO L226 Difference]: Without dead ends: 99 [2022-03-20 13:00:01,908 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=902, Invalid=1168, Unknown=0, NotChecked=0, Total=2070 [2022-03-20 13:00:01,908 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 183 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:00:01,908 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 36 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:00:01,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-03-20 13:00:01,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 49. [2022-03-20 13:00:01,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:01,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2022-03-20 13:00:01,920 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 46 [2022-03-20 13:00:01,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:00:01,920 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2022-03-20 13:00:01,920 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:01,920 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2022-03-20 13:00:01,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-20 13:00:01,921 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:00:01,922 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:00:01,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-20 13:00:02,135 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-20 13:00:02,135 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:00:02,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:00:02,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1540337781, now seen corresponding path program 29 times [2022-03-20 13:00:02,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:02,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1745158112] [2022-03-20 13:00:02,137 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:00:02,137 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:00:02,137 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:00:02,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1540337781, now seen corresponding path program 30 times [2022-03-20 13:00:02,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:00:02,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527613871] [2022-03-20 13:00:02,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:00:02,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:00:02,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:02,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:00:02,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:02,275 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:00:02,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:00:02,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527613871] [2022-03-20 13:00:02,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527613871] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:00:02,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274537462] [2022-03-20 13:00:02,277 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:00:02,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:00:02,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:00:02,278 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:00:02,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-20 13:00:02,337 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 13:00:02,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:00:02,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 13:00:02,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:00:02,404 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-03-20 13:00:02,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:00:02,489 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-03-20 13:00:02,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274537462] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:00:02,489 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:00:02,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 7, 7] total 24 [2022-03-20 13:00:02,489 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:00:02,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1745158112] [2022-03-20 13:00:02,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1745158112] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:00:02,489 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:00:02,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 13:00:02,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134550271] [2022-03-20 13:00:02,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:00:02,490 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 13:00:02,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:02,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 13:00:02,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=336, Unknown=0, NotChecked=0, Total=552 [2022-03-20 13:00:02,490 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:02,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:00:02,759 INFO L93 Difference]: Finished difference Result 119 states and 134 transitions. [2022-03-20 13:00:02,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 13:00:02,759 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-03-20 13:00:02,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:00:02,760 INFO L225 Difference]: With dead ends: 119 [2022-03-20 13:00:02,760 INFO L226 Difference]: Without dead ends: 105 [2022-03-20 13:00:02,760 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=532, Invalid=950, Unknown=0, NotChecked=0, Total=1482 [2022-03-20 13:00:02,760 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 202 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:00:02,761 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 26 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:00:02,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-03-20 13:00:02,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 51. [2022-03-20 13:00:02,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 46 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:02,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2022-03-20 13:00:02,767 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 48 [2022-03-20 13:00:02,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:00:02,767 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2022-03-20 13:00:02,767 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:02,767 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2022-03-20 13:00:02,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-20 13:00:02,767 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:00:02,768 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:00:02,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-20 13:00:02,968 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-20 13:00:02,968 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:00:02,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:00:02,968 INFO L85 PathProgramCache]: Analyzing trace with hash -263235667, now seen corresponding path program 31 times [2022-03-20 13:00:02,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:02,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [284536052] [2022-03-20 13:00:02,970 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:00:02,970 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:00:02,970 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:00:02,970 INFO L85 PathProgramCache]: Analyzing trace with hash -263235667, now seen corresponding path program 32 times [2022-03-20 13:00:02,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:00:02,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805833119] [2022-03-20 13:00:02,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:00:02,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:00:02,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:03,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:00:03,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:03,092 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:00:03,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:00:03,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805833119] [2022-03-20 13:00:03,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805833119] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:00:03,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546955374] [2022-03-20 13:00:03,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:00:03,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:00:03,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:00:03,093 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:00:03,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-20 13:00:03,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:00:03,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:00:03,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 13:00:03,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:00:03,234 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:00:03,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:00:03,543 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:00:03,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546955374] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:00:03,543 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:00:03,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 36 [2022-03-20 13:00:03,543 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:00:03,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [284536052] [2022-03-20 13:00:03,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [284536052] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:00:03,544 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:00:03,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 13:00:03,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454377178] [2022-03-20 13:00:03,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:00:03,544 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 13:00:03,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:03,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 13:00:03,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 13:00:03,545 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:03,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:00:03,828 INFO L93 Difference]: Finished difference Result 125 states and 141 transitions. [2022-03-20 13:00:03,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 13:00:03,828 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-03-20 13:00:03,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:00:03,829 INFO L225 Difference]: With dead ends: 125 [2022-03-20 13:00:03,829 INFO L226 Difference]: Without dead ends: 111 [2022-03-20 13:00:03,831 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1158, Invalid=1494, Unknown=0, NotChecked=0, Total=2652 [2022-03-20 13:00:03,831 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 167 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:00:03,832 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 56 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:00:03,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-03-20 13:00:03,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 53. [2022-03-20 13:00:03,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 48 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:03,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2022-03-20 13:00:03,840 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2022-03-20 13:00:03,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:00:03,840 INFO L478 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2022-03-20 13:00:03,840 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:03,840 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2022-03-20 13:00:03,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-20 13:00:03,841 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:00:03,841 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:00:03,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-20 13:00:04,055 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:00:04,056 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:00:04,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:00:04,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1328750769, now seen corresponding path program 33 times [2022-03-20 13:00:04,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:04,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1058285469] [2022-03-20 13:00:04,057 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:00:04,057 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:00:04,057 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:00:04,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1328750769, now seen corresponding path program 34 times [2022-03-20 13:00:04,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:00:04,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401758207] [2022-03-20 13:00:04,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:00:04,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:00:04,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:04,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:00:04,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:04,204 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:00:04,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:00:04,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401758207] [2022-03-20 13:00:04,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401758207] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:00:04,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129207825] [2022-03-20 13:00:04,204 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:00:04,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:00:04,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:00:04,205 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:00:04,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-20 13:00:04,291 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:00:04,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:00:04,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-20 13:00:04,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:00:04,372 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:00:04,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:00:04,727 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:00:04,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129207825] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:00:04,727 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:00:04,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 38 [2022-03-20 13:00:04,727 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:00:04,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1058285469] [2022-03-20 13:00:04,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1058285469] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:00:04,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:00:04,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 13:00:04,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354409560] [2022-03-20 13:00:04,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:00:04,728 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 13:00:04,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:04,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 13:00:04,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 13:00:04,728 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:05,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:00:05,026 INFO L93 Difference]: Finished difference Result 131 states and 148 transitions. [2022-03-20 13:00:05,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 13:00:05,028 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-03-20 13:00:05,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:00:05,028 INFO L225 Difference]: With dead ends: 131 [2022-03-20 13:00:05,028 INFO L226 Difference]: Without dead ends: 117 [2022-03-20 13:00:05,029 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1298, Invalid=1672, Unknown=0, NotChecked=0, Total=2970 [2022-03-20 13:00:05,029 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 203 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:00:05,030 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 36 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:00:05,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-03-20 13:00:05,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 55. [2022-03-20 13:00:05,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.04) internal successors, (52), 50 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:05,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2022-03-20 13:00:05,037 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 52 [2022-03-20 13:00:05,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:00:05,037 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2022-03-20 13:00:05,037 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:05,037 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2022-03-20 13:00:05,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-20 13:00:05,038 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:00:05,038 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:00:05,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-20 13:00:05,243 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:00:05,244 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:00:05,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:00:05,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1208419953, now seen corresponding path program 35 times [2022-03-20 13:00:05,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:05,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [469374541] [2022-03-20 13:00:05,245 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:00:05,245 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:00:05,245 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:00:05,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1208419953, now seen corresponding path program 36 times [2022-03-20 13:00:05,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:00:05,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453968545] [2022-03-20 13:00:05,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:00:05,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:00:05,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:05,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:00:05,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:05,409 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:00:05,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:00:05,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453968545] [2022-03-20 13:00:05,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453968545] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:00:05,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678601627] [2022-03-20 13:00:05,409 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:00:05,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:00:05,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:00:05,410 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:00:05,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-20 13:00:05,475 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 13:00:05,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:00:05,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 13:00:05,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:00:05,546 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2022-03-20 13:00:05,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:00:05,650 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2022-03-20 13:00:05,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678601627] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:00:05,650 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:00:05,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 7, 7] total 27 [2022-03-20 13:00:05,651 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:00:05,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [469374541] [2022-03-20 13:00:05,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [469374541] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:00:05,651 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:00:05,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 13:00:05,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064283104] [2022-03-20 13:00:05,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:00:05,651 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 13:00:05,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:05,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 13:00:05,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=420, Unknown=0, NotChecked=0, Total=702 [2022-03-20 13:00:05,652 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:06,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:00:06,024 INFO L93 Difference]: Finished difference Result 137 states and 155 transitions. [2022-03-20 13:00:06,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 13:00:06,025 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-03-20 13:00:06,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:00:06,025 INFO L225 Difference]: With dead ends: 137 [2022-03-20 13:00:06,026 INFO L226 Difference]: Without dead ends: 123 [2022-03-20 13:00:06,026 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=715, Invalid=1265, Unknown=0, NotChecked=0, Total=1980 [2022-03-20 13:00:06,026 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 204 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:00:06,027 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 46 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:00:06,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-03-20 13:00:06,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 57. [2022-03-20 13:00:06,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:06,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2022-03-20 13:00:06,035 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 54 [2022-03-20 13:00:06,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:00:06,035 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2022-03-20 13:00:06,035 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:06,035 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2022-03-20 13:00:06,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-20 13:00:06,035 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:00:06,035 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:00:06,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-20 13:00:06,238 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:00:06,238 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:00:06,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:00:06,239 INFO L85 PathProgramCache]: Analyzing trace with hash -111940333, now seen corresponding path program 37 times [2022-03-20 13:00:06,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:06,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1542195580] [2022-03-20 13:00:06,240 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:00:06,240 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:00:06,240 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:00:06,240 INFO L85 PathProgramCache]: Analyzing trace with hash -111940333, now seen corresponding path program 38 times [2022-03-20 13:00:06,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:00:06,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114558777] [2022-03-20 13:00:06,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:00:06,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:00:06,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:06,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:00:06,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:06,411 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:00:06,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:00:06,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114558777] [2022-03-20 13:00:06,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114558777] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:00:06,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765871779] [2022-03-20 13:00:06,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:00:06,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:00:06,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:00:06,413 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:00:06,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-20 13:00:06,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:00:06,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:00:06,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-20 13:00:06,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:00:06,571 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:00:06,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:00:06,970 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:00:06,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765871779] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:00:06,971 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:00:06,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 42 [2022-03-20 13:00:06,971 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:00:06,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1542195580] [2022-03-20 13:00:06,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1542195580] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:00:06,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:00:06,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-20 13:00:06,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423522809] [2022-03-20 13:00:06,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:00:06,971 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 13:00:06,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:06,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 13:00:06,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 13:00:06,972 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:07,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:00:07,348 INFO L93 Difference]: Finished difference Result 143 states and 162 transitions. [2022-03-20 13:00:07,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 13:00:07,350 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-03-20 13:00:07,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:00:07,351 INFO L225 Difference]: With dead ends: 143 [2022-03-20 13:00:07,351 INFO L226 Difference]: Without dead ends: 129 [2022-03-20 13:00:07,352 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1602, Invalid=2058, Unknown=0, NotChecked=0, Total=3660 [2022-03-20 13:00:07,352 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 254 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:00:07,352 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 31 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:00:07,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-03-20 13:00:07,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 59. [2022-03-20 13:00:07,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.037037037037037) internal successors, (56), 54 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:07,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2022-03-20 13:00:07,361 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 56 [2022-03-20 13:00:07,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:00:07,362 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2022-03-20 13:00:07,362 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:07,362 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2022-03-20 13:00:07,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-20 13:00:07,362 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:00:07,362 INFO L499 BasicCegarLoop]: trace histogram [19, 19, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:00:07,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-20 13:00:07,562 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-03-20 13:00:07,563 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:00:07,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:00:07,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1962822859, now seen corresponding path program 39 times [2022-03-20 13:00:07,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:07,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [975885829] [2022-03-20 13:00:07,564 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:00:07,564 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:00:07,564 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:00:07,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1962822859, now seen corresponding path program 40 times [2022-03-20 13:00:07,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:00:07,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275598136] [2022-03-20 13:00:07,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:00:07,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:00:07,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:07,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:00:07,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:07,748 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:00:07,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:00:07,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275598136] [2022-03-20 13:00:07,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275598136] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:00:07,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174347643] [2022-03-20 13:00:07,748 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:00:07,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:00:07,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:00:07,750 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:00:07,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-20 13:00:07,825 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:00:07,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:00:07,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-20 13:00:07,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:00:07,922 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:00:07,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:00:08,339 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:00:08,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174347643] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:00:08,340 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:00:08,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 44 [2022-03-20 13:00:08,340 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:00:08,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [975885829] [2022-03-20 13:00:08,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [975885829] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:00:08,340 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:00:08,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-20 13:00:08,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207554210] [2022-03-20 13:00:08,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:00:08,340 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 13:00:08,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:08,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 13:00:08,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2022-03-20 13:00:08,341 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:08,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:00:08,743 INFO L93 Difference]: Finished difference Result 149 states and 169 transitions. [2022-03-20 13:00:08,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 13:00:08,743 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-03-20 13:00:08,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:00:08,744 INFO L225 Difference]: With dead ends: 149 [2022-03-20 13:00:08,744 INFO L226 Difference]: Without dead ends: 135 [2022-03-20 13:00:08,745 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1766, Invalid=2266, Unknown=0, NotChecked=0, Total=4032 [2022-03-20 13:00:08,745 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 290 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:00:08,745 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 36 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:00:08,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-03-20 13:00:08,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 61. [2022-03-20 13:00:08,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 56 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:08,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2022-03-20 13:00:08,755 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 58 [2022-03-20 13:00:08,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:00:08,755 INFO L478 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2022-03-20 13:00:08,755 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:08,755 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2022-03-20 13:00:08,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-20 13:00:08,755 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:00:08,755 INFO L499 BasicCegarLoop]: trace histogram [20, 20, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:00:08,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-20 13:00:08,959 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-03-20 13:00:08,960 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:00:08,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:00:08,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1750497495, now seen corresponding path program 41 times [2022-03-20 13:00:08,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:08,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [771011035] [2022-03-20 13:00:08,961 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:00:08,961 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:00:08,961 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:00:08,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1750497495, now seen corresponding path program 42 times [2022-03-20 13:00:08,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:00:08,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277582655] [2022-03-20 13:00:08,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:00:08,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:00:08,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:09,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:00:09,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:09,154 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:00:09,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:00:09,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277582655] [2022-03-20 13:00:09,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277582655] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:00:09,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605089709] [2022-03-20 13:00:09,154 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:00:09,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:00:09,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:00:09,156 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:00:09,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-20 13:00:09,229 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 13:00:09,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:00:09,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 13:00:09,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:00:09,310 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-03-20 13:00:09,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:00:09,412 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-03-20 13:00:09,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605089709] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:00:09,412 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:00:09,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 7, 7] total 30 [2022-03-20 13:00:09,413 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:00:09,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [771011035] [2022-03-20 13:00:09,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [771011035] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:00:09,413 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:00:09,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-20 13:00:09,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246900351] [2022-03-20 13:00:09,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:00:09,413 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 13:00:09,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:09,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 13:00:09,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=513, Unknown=0, NotChecked=0, Total=870 [2022-03-20 13:00:09,414 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:09,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:00:09,846 INFO L93 Difference]: Finished difference Result 155 states and 176 transitions. [2022-03-20 13:00:09,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-20 13:00:09,846 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-03-20 13:00:09,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:00:09,846 INFO L225 Difference]: With dead ends: 155 [2022-03-20 13:00:09,846 INFO L226 Difference]: Without dead ends: 141 [2022-03-20 13:00:09,847 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=925, Invalid=1625, Unknown=0, NotChecked=0, Total=2550 [2022-03-20 13:00:09,847 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 270 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:00:09,848 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 26 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:00:09,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-03-20 13:00:09,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 63. [2022-03-20 13:00:09,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 58 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:09,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2022-03-20 13:00:09,858 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 60 [2022-03-20 13:00:09,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:00:09,858 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2022-03-20 13:00:09,858 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:09,858 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2022-03-20 13:00:09,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-03-20 13:00:09,859 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:00:09,859 INFO L499 BasicCegarLoop]: trace histogram [21, 21, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:00:09,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-20 13:00:10,074 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:00:10,075 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:00:10,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:00:10,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1133534713, now seen corresponding path program 43 times [2022-03-20 13:00:10,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:10,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1455493403] [2022-03-20 13:00:10,076 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:00:10,076 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:00:10,076 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:00:10,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1133534713, now seen corresponding path program 44 times [2022-03-20 13:00:10,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:00:10,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685358566] [2022-03-20 13:00:10,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:00:10,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:00:10,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:10,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:00:10,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:10,282 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:00:10,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:00:10,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685358566] [2022-03-20 13:00:10,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685358566] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:00:10,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679887245] [2022-03-20 13:00:10,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:00:10,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:00:10,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:00:10,284 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:00:10,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-20 13:00:10,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:00:10,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:00:10,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-20 13:00:10,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:00:10,493 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:00:10,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:00:10,984 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:00:10,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679887245] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:00:10,985 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:00:10,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 48 [2022-03-20 13:00:10,985 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:00:10,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1455493403] [2022-03-20 13:00:10,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1455493403] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:00:10,985 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:00:10,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-20 13:00:10,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119554238] [2022-03-20 13:00:10,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:00:10,985 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-20 13:00:10,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:10,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-20 13:00:10,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2022-03-20 13:00:10,986 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:11,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:00:11,477 INFO L93 Difference]: Finished difference Result 161 states and 183 transitions. [2022-03-20 13:00:11,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-20 13:00:11,477 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-03-20 13:00:11,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:00:11,478 INFO L225 Difference]: With dead ends: 161 [2022-03-20 13:00:11,478 INFO L226 Difference]: Without dead ends: 147 [2022-03-20 13:00:11,479 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2118, Invalid=2712, Unknown=0, NotChecked=0, Total=4830 [2022-03-20 13:00:11,479 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 268 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:00:11,479 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 41 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:00:11,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-03-20 13:00:11,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 65. [2022-03-20 13:00:11,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 60 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:11,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2022-03-20 13:00:11,497 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 62 [2022-03-20 13:00:11,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:00:11,497 INFO L478 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2022-03-20 13:00:11,497 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:11,497 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2022-03-20 13:00:11,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-20 13:00:11,498 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:00:11,498 INFO L499 BasicCegarLoop]: trace histogram [22, 22, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:00:11,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-20 13:00:11,707 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:00:11,707 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:00:11,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:00:11,708 INFO L85 PathProgramCache]: Analyzing trace with hash 937788059, now seen corresponding path program 45 times [2022-03-20 13:00:11,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:11,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1549182649] [2022-03-20 13:00:11,709 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:00:11,709 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:00:11,709 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:00:11,709 INFO L85 PathProgramCache]: Analyzing trace with hash 937788059, now seen corresponding path program 46 times [2022-03-20 13:00:11,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:00:11,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154201926] [2022-03-20 13:00:11,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:00:11,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:00:11,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:11,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:00:11,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:11,952 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:00:11,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:00:11,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154201926] [2022-03-20 13:00:11,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154201926] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:00:11,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731318042] [2022-03-20 13:00:11,952 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:00:11,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:00:11,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:00:11,954 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:00:11,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-20 13:00:12,053 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:00:12,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:00:12,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-20 13:00:12,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:00:12,158 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:00:12,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:00:12,756 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:00:12,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731318042] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:00:12,757 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:00:12,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-03-20 13:00:12,757 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:00:12,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1549182649] [2022-03-20 13:00:12,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1549182649] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:00:12,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:00:12,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-20 13:00:12,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121382456] [2022-03-20 13:00:12,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:00:12,758 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-20 13:00:12,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:12,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-20 13:00:12,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-03-20 13:00:12,759 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:13,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:00:13,302 INFO L93 Difference]: Finished difference Result 167 states and 190 transitions. [2022-03-20 13:00:13,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-20 13:00:13,302 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-03-20 13:00:13,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:00:13,303 INFO L225 Difference]: With dead ends: 167 [2022-03-20 13:00:13,303 INFO L226 Difference]: Without dead ends: 153 [2022-03-20 13:00:13,304 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2306, Invalid=2950, Unknown=0, NotChecked=0, Total=5256 [2022-03-20 13:00:13,305 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 330 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:00:13,306 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [330 Valid, 36 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 13:00:13,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-03-20 13:00:13,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 67. [2022-03-20 13:00:13,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.032258064516129) internal successors, (64), 62 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:13,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2022-03-20 13:00:13,318 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 64 [2022-03-20 13:00:13,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:00:13,318 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2022-03-20 13:00:13,318 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:13,318 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2022-03-20 13:00:13,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-20 13:00:13,319 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:00:13,319 INFO L499 BasicCegarLoop]: trace histogram [23, 23, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:00:13,337 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-03-20 13:00:13,527 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-20 13:00:13,527 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:00:13,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:00:13,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1803814589, now seen corresponding path program 47 times [2022-03-20 13:00:13,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:13,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1781096089] [2022-03-20 13:00:13,529 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:00:13,529 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:00:13,529 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:00:13,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1803814589, now seen corresponding path program 48 times [2022-03-20 13:00:13,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:00:13,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891470814] [2022-03-20 13:00:13,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:00:13,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:00:13,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:13,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:00:13,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:13,798 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:00:13,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:00:13,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891470814] [2022-03-20 13:00:13,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891470814] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:00:13,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129145158] [2022-03-20 13:00:13,798 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:00:13,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:00:13,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:00:13,804 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:00:13,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-20 13:00:13,897 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 13:00:13,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:00:13,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 13:00:13,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:00:13,985 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2022-03-20 13:00:13,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:00:14,100 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2022-03-20 13:00:14,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129145158] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:00:14,100 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:00:14,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 7, 7] total 33 [2022-03-20 13:00:14,101 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:00:14,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1781096089] [2022-03-20 13:00:14,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1781096089] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:00:14,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:00:14,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-20 13:00:14,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425364557] [2022-03-20 13:00:14,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:00:14,101 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-20 13:00:14,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:14,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-20 13:00:14,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=615, Unknown=0, NotChecked=0, Total=1056 [2022-03-20 13:00:14,102 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 26 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:14,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:00:14,664 INFO L93 Difference]: Finished difference Result 173 states and 197 transitions. [2022-03-20 13:00:14,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-20 13:00:14,665 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 26 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-03-20 13:00:14,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:00:14,668 INFO L225 Difference]: With dead ends: 173 [2022-03-20 13:00:14,668 INFO L226 Difference]: Without dead ends: 159 [2022-03-20 13:00:14,668 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 127 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1162, Invalid=2030, Unknown=0, NotChecked=0, Total=3192 [2022-03-20 13:00:14,669 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 287 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:00:14,669 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 51 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 13:00:14,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-03-20 13:00:14,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 69. [2022-03-20 13:00:14,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.03125) internal successors, (66), 64 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:14,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2022-03-20 13:00:14,682 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 66 [2022-03-20 13:00:14,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:00:14,682 INFO L478 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2022-03-20 13:00:14,682 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 26 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:14,682 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2022-03-20 13:00:14,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-20 13:00:14,682 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:00:14,683 INFO L499 BasicCegarLoop]: trace histogram [24, 24, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:00:14,699 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-03-20 13:00:14,883 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-20 13:00:14,883 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:00:14,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:00:14,883 INFO L85 PathProgramCache]: Analyzing trace with hash 831654495, now seen corresponding path program 49 times [2022-03-20 13:00:14,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:14,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2090615583] [2022-03-20 13:00:14,885 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:00:14,885 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:00:14,885 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:00:14,885 INFO L85 PathProgramCache]: Analyzing trace with hash 831654495, now seen corresponding path program 50 times [2022-03-20 13:00:14,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:00:14,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280764554] [2022-03-20 13:00:14,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:00:14,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:00:14,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:15,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:00:15,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:15,136 INFO L134 CoverageAnalysis]: Checked inductivity of 583 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:00:15,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:00:15,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280764554] [2022-03-20 13:00:15,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280764554] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:00:15,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001412267] [2022-03-20 13:00:15,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:00:15,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:00:15,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:00:15,138 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:00:15,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-20 13:00:15,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:00:15,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:00:15,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-20 13:00:15,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:00:15,347 INFO L134 CoverageAnalysis]: Checked inductivity of 583 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:00:15,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:00:15,986 INFO L134 CoverageAnalysis]: Checked inductivity of 583 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:00:15,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001412267] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:00:15,987 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:00:15,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 54 [2022-03-20 13:00:15,987 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:00:15,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2090615583] [2022-03-20 13:00:15,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2090615583] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:00:15,987 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:00:15,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-03-20 13:00:15,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989559853] [2022-03-20 13:00:15,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:00:15,987 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-20 13:00:15,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:15,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-20 13:00:15,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 13:00:15,989 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:16,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:00:16,587 INFO L93 Difference]: Finished difference Result 179 states and 204 transitions. [2022-03-20 13:00:16,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-20 13:00:16,587 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-03-20 13:00:16,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:00:16,588 INFO L225 Difference]: With dead ends: 179 [2022-03-20 13:00:16,589 INFO L226 Difference]: Without dead ends: 165 [2022-03-20 13:00:16,589 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2706, Invalid=3456, Unknown=0, NotChecked=0, Total=6162 [2022-03-20 13:00:16,589 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 323 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:00:16,590 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 41 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 13:00:16,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-03-20 13:00:16,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 71. [2022-03-20 13:00:16,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.0303030303030303) internal successors, (68), 66 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:16,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2022-03-20 13:00:16,604 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 68 [2022-03-20 13:00:16,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:00:16,604 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2022-03-20 13:00:16,604 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:16,604 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2022-03-20 13:00:16,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-03-20 13:00:16,604 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:00:16,604 INFO L499 BasicCegarLoop]: trace histogram [25, 25, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:00:16,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-20 13:00:16,824 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-20 13:00:16,824 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:00:16,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:00:16,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1406292607, now seen corresponding path program 51 times [2022-03-20 13:00:16,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:16,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1923077855] [2022-03-20 13:00:16,826 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:00:16,827 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:00:16,827 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:00:16,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1406292607, now seen corresponding path program 52 times [2022-03-20 13:00:16,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:00:16,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094039678] [2022-03-20 13:00:16,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:00:16,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:00:16,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:17,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:00:17,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:17,112 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:00:17,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:00:17,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094039678] [2022-03-20 13:00:17,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094039678] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:00:17,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664261176] [2022-03-20 13:00:17,113 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:00:17,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:00:17,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:00:17,114 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:00:17,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-20 13:00:17,218 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:00:17,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:00:17,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-20 13:00:17,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:00:17,314 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:00:17,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:00:17,978 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:00:17,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664261176] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:00:17,978 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:00:17,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 56 [2022-03-20 13:00:17,978 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:00:17,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1923077855] [2022-03-20 13:00:17,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1923077855] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:00:17,978 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:00:17,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-03-20 13:00:17,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680621203] [2022-03-20 13:00:17,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:00:17,979 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-20 13:00:17,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:17,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-20 13:00:17,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2022-03-20 13:00:17,979 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:18,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:00:18,624 INFO L93 Difference]: Finished difference Result 185 states and 211 transitions. [2022-03-20 13:00:18,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-20 13:00:18,624 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-03-20 13:00:18,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:00:18,625 INFO L225 Difference]: With dead ends: 185 [2022-03-20 13:00:18,625 INFO L226 Difference]: Without dead ends: 171 [2022-03-20 13:00:18,625 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2918, Invalid=3724, Unknown=0, NotChecked=0, Total=6642 [2022-03-20 13:00:18,626 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 327 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:00:18,626 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 41 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 13:00:18,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-03-20 13:00:18,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 73. [2022-03-20 13:00:18,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:18,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2022-03-20 13:00:18,642 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 70 [2022-03-20 13:00:18,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:00:18,642 INFO L478 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2022-03-20 13:00:18,642 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:18,642 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2022-03-20 13:00:18,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-03-20 13:00:18,643 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:00:18,643 INFO L499 BasicCegarLoop]: trace histogram [26, 26, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:00:18,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-20 13:00:18,843 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-20 13:00:18,843 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:00:18,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:00:18,844 INFO L85 PathProgramCache]: Analyzing trace with hash -294842333, now seen corresponding path program 53 times [2022-03-20 13:00:18,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:18,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1880664103] [2022-03-20 13:00:18,845 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:00:18,845 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:00:18,845 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:00:18,845 INFO L85 PathProgramCache]: Analyzing trace with hash -294842333, now seen corresponding path program 54 times [2022-03-20 13:00:18,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:00:18,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620260650] [2022-03-20 13:00:18,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:00:18,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:00:18,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:19,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:00:19,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:19,132 INFO L134 CoverageAnalysis]: Checked inductivity of 683 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:00:19,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:00:19,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620260650] [2022-03-20 13:00:19,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620260650] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:00:19,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394484678] [2022-03-20 13:00:19,132 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:00:19,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:00:19,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:00:19,133 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:00:19,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-20 13:00:19,239 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 13:00:19,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:00:19,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 13:00:19,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:00:19,340 INFO L134 CoverageAnalysis]: Checked inductivity of 683 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2022-03-20 13:00:19,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:00:19,461 INFO L134 CoverageAnalysis]: Checked inductivity of 683 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2022-03-20 13:00:19,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394484678] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:00:19,461 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:00:19,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 7, 7] total 36 [2022-03-20 13:00:19,462 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:00:19,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1880664103] [2022-03-20 13:00:19,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1880664103] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:00:19,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:00:19,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-03-20 13:00:19,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753628891] [2022-03-20 13:00:19,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:00:19,462 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-20 13:00:19,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:19,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-20 13:00:19,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=534, Invalid=726, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 13:00:19,463 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:20,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:00:20,257 INFO L93 Difference]: Finished difference Result 191 states and 218 transitions. [2022-03-20 13:00:20,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-20 13:00:20,258 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-03-20 13:00:20,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:00:20,259 INFO L225 Difference]: With dead ends: 191 [2022-03-20 13:00:20,259 INFO L226 Difference]: Without dead ends: 177 [2022-03-20 13:00:20,259 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1426, Invalid=2480, Unknown=0, NotChecked=0, Total=3906 [2022-03-20 13:00:20,259 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 407 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:00:20,260 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 21 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 13:00:20,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-03-20 13:00:20,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 75. [2022-03-20 13:00:20,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 70 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:20,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2022-03-20 13:00:20,276 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 72 [2022-03-20 13:00:20,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:00:20,276 INFO L478 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2022-03-20 13:00:20,276 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:20,276 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2022-03-20 13:00:20,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-03-20 13:00:20,276 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:00:20,276 INFO L499 BasicCegarLoop]: trace histogram [27, 27, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:00:20,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-20 13:00:20,477 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:00:20,478 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:00:20,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:00:20,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1637985723, now seen corresponding path program 55 times [2022-03-20 13:00:20,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:20,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [569891025] [2022-03-20 13:00:20,479 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:00:20,479 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:00:20,479 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:00:20,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1637985723, now seen corresponding path program 56 times [2022-03-20 13:00:20,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:00:20,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15118405] [2022-03-20 13:00:20,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:00:20,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:00:20,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:20,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:00:20,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:20,792 INFO L134 CoverageAnalysis]: Checked inductivity of 736 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:00:20,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:00:20,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15118405] [2022-03-20 13:00:20,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15118405] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:00:20,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014529016] [2022-03-20 13:00:20,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:00:20,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:00:20,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:00:20,794 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:00:20,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-20 13:00:20,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:00:20,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:00:20,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-20 13:00:20,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:00:21,024 INFO L134 CoverageAnalysis]: Checked inductivity of 736 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:00:21,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:00:21,857 INFO L134 CoverageAnalysis]: Checked inductivity of 736 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:00:21,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014529016] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:00:21,858 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:00:21,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 60 [2022-03-20 13:00:21,858 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:00:21,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [569891025] [2022-03-20 13:00:21,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [569891025] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:00:21,858 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:00:21,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-03-20 13:00:21,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396855187] [2022-03-20 13:00:21,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:00:21,858 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-20 13:00:21,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:21,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-20 13:00:21,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2022-03-20 13:00:21,859 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 30 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:22,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:00:22,628 INFO L93 Difference]: Finished difference Result 197 states and 225 transitions. [2022-03-20 13:00:22,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-20 13:00:22,629 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 30 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-03-20 13:00:22,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:00:22,629 INFO L225 Difference]: With dead ends: 197 [2022-03-20 13:00:22,629 INFO L226 Difference]: Without dead ends: 183 [2022-03-20 13:00:22,630 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3366, Invalid=4290, Unknown=0, NotChecked=0, Total=7656 [2022-03-20 13:00:22,630 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 343 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:00:22,630 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 46 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 13:00:22,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-03-20 13:00:22,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 77. [2022-03-20 13:00:22,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.0277777777777777) internal successors, (74), 72 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:22,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2022-03-20 13:00:22,647 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 74 [2022-03-20 13:00:22,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:00:22,647 INFO L478 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2022-03-20 13:00:22,647 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 30 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:22,647 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2022-03-20 13:00:22,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-03-20 13:00:22,651 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:00:22,651 INFO L499 BasicCegarLoop]: trace histogram [28, 28, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:00:22,679 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-03-20 13:00:22,867 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:00:22,868 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:00:22,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:00:22,868 INFO L85 PathProgramCache]: Analyzing trace with hash 386372583, now seen corresponding path program 57 times [2022-03-20 13:00:22,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:22,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1792755816] [2022-03-20 13:00:22,870 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:00:22,870 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:00:22,870 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:00:22,871 INFO L85 PathProgramCache]: Analyzing trace with hash 386372583, now seen corresponding path program 58 times [2022-03-20 13:00:22,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:00:22,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417383416] [2022-03-20 13:00:22,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:00:22,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:00:22,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:23,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:00:23,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:23,175 INFO L134 CoverageAnalysis]: Checked inductivity of 791 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:00:23,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:00:23,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417383416] [2022-03-20 13:00:23,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417383416] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:00:23,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103093578] [2022-03-20 13:00:23,176 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:00:23,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:00:23,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:00:23,177 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:00:23,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-20 13:00:23,310 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:00:23,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:00:23,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-20 13:00:23,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:00:23,418 INFO L134 CoverageAnalysis]: Checked inductivity of 791 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:00:23,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:00:24,285 INFO L134 CoverageAnalysis]: Checked inductivity of 791 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:00:24,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103093578] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:00:24,285 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:00:24,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 62 [2022-03-20 13:00:24,285 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:00:24,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1792755816] [2022-03-20 13:00:24,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1792755816] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:00:24,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:00:24,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-03-20 13:00:24,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526134631] [2022-03-20 13:00:24,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:00:24,286 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-20 13:00:24,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:24,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-20 13:00:24,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2022-03-20 13:00:24,287 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand has 32 states, 32 states have (on average 2.125) internal successors, (68), 31 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:25,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:00:25,169 INFO L93 Difference]: Finished difference Result 203 states and 232 transitions. [2022-03-20 13:00:25,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-20 13:00:25,169 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 31 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-03-20 13:00:25,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:00:25,170 INFO L225 Difference]: With dead ends: 203 [2022-03-20 13:00:25,170 INFO L226 Difference]: Without dead ends: 189 [2022-03-20 13:00:25,171 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3602, Invalid=4588, Unknown=0, NotChecked=0, Total=8190 [2022-03-20 13:00:25,171 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 361 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:00:25,171 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [361 Valid, 51 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 13:00:25,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-03-20 13:00:25,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 79. [2022-03-20 13:00:25,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.027027027027027) internal successors, (76), 74 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:25,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2022-03-20 13:00:25,190 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 76 [2022-03-20 13:00:25,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:00:25,190 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2022-03-20 13:00:25,191 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 31 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:25,191 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2022-03-20 13:00:25,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-03-20 13:00:25,191 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:00:25,191 INFO L499 BasicCegarLoop]: trace histogram [29, 29, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:00:25,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-20 13:00:25,399 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-03-20 13:00:25,399 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:00:25,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:00:25,400 INFO L85 PathProgramCache]: Analyzing trace with hash 174519561, now seen corresponding path program 59 times [2022-03-20 13:00:25,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:25,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1676910722] [2022-03-20 13:00:25,401 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:00:25,401 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:00:25,401 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:00:25,401 INFO L85 PathProgramCache]: Analyzing trace with hash 174519561, now seen corresponding path program 60 times [2022-03-20 13:00:25,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:00:25,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541479144] [2022-03-20 13:00:25,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:00:25,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:00:25,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:25,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:00:25,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:25,716 INFO L134 CoverageAnalysis]: Checked inductivity of 848 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:00:25,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:00:25,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541479144] [2022-03-20 13:00:25,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541479144] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:00:25,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277236651] [2022-03-20 13:00:25,716 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:00:25,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:00:25,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:00:25,717 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:00:25,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-20 13:00:25,826 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 13:00:25,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:00:25,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 13:00:25,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:00:25,927 INFO L134 CoverageAnalysis]: Checked inductivity of 848 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-03-20 13:00:25,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:00:26,057 INFO L134 CoverageAnalysis]: Checked inductivity of 848 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-03-20 13:00:26,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277236651] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:00:26,057 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:00:26,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 7, 7] total 39 [2022-03-20 13:00:26,058 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:00:26,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1676910722] [2022-03-20 13:00:26,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1676910722] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:00:26,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:00:26,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-03-20 13:00:26,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151577377] [2022-03-20 13:00:26,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:00:26,058 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-20 13:00:26,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:26,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-20 13:00:26,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=636, Invalid=846, Unknown=0, NotChecked=0, Total=1482 [2022-03-20 13:00:26,059 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand has 33 states, 33 states have (on average 2.121212121212121) internal successors, (70), 32 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:26,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:00:26,974 INFO L93 Difference]: Finished difference Result 209 states and 239 transitions. [2022-03-20 13:00:26,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-20 13:00:26,974 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.121212121212121) internal successors, (70), 32 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-03-20 13:00:26,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:00:26,975 INFO L225 Difference]: With dead ends: 209 [2022-03-20 13:00:26,975 INFO L226 Difference]: Without dead ends: 195 [2022-03-20 13:00:26,975 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 151 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1717, Invalid=2975, Unknown=0, NotChecked=0, Total=4692 [2022-03-20 13:00:26,976 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 428 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:00:26,976 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [428 Valid, 36 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 13:00:26,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-03-20 13:00:26,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 81. [2022-03-20 13:00:26,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 76 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:26,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2022-03-20 13:00:26,995 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 78 [2022-03-20 13:00:26,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:00:26,995 INFO L478 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2022-03-20 13:00:26,995 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.121212121212121) internal successors, (70), 32 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:26,995 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2022-03-20 13:00:26,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-20 13:00:26,995 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:00:26,996 INFO L499 BasicCegarLoop]: trace histogram [30, 30, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:00:27,012 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-03-20 13:00:27,196 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:00:27,196 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:00:27,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:00:27,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1552771669, now seen corresponding path program 61 times [2022-03-20 13:00:27,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:27,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1563663224] [2022-03-20 13:00:27,198 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:00:27,198 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:00:27,198 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:00:27,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1552771669, now seen corresponding path program 62 times [2022-03-20 13:00:27,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:00:27,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509699967] [2022-03-20 13:00:27,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:00:27,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:00:27,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:27,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:00:27,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:27,577 INFO L134 CoverageAnalysis]: Checked inductivity of 907 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:00:27,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:00:27,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509699967] [2022-03-20 13:00:27,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509699967] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:00:27,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346205850] [2022-03-20 13:00:27,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:00:27,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:00:27,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:00:27,578 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:00:27,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-20 13:00:27,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:00:27,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:00:27,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-20 13:00:27,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:00:27,829 INFO L134 CoverageAnalysis]: Checked inductivity of 907 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:00:27,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:00:28,729 INFO L134 CoverageAnalysis]: Checked inductivity of 907 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:00:28,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346205850] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:00:28,729 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:00:28,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 66 [2022-03-20 13:00:28,729 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:00:28,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1563663224] [2022-03-20 13:00:28,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1563663224] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:00:28,729 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:00:28,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-03-20 13:00:28,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546948629] [2022-03-20 13:00:28,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:00:28,730 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-20 13:00:28,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:28,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-20 13:00:28,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2022-03-20 13:00:28,730 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:29,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:00:29,664 INFO L93 Difference]: Finished difference Result 215 states and 246 transitions. [2022-03-20 13:00:29,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-20 13:00:29,665 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-03-20 13:00:29,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:00:29,665 INFO L225 Difference]: With dead ends: 215 [2022-03-20 13:00:29,665 INFO L226 Difference]: Without dead ends: 201 [2022-03-20 13:00:29,666 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=4098, Invalid=5214, Unknown=0, NotChecked=0, Total=9312 [2022-03-20 13:00:29,666 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 463 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:00:29,666 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [463 Valid, 26 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 13:00:29,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-03-20 13:00:29,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 83. [2022-03-20 13:00:29,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.0256410256410255) internal successors, (80), 78 states have internal predecessors, (80), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:29,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2022-03-20 13:00:29,687 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 80 [2022-03-20 13:00:29,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:00:29,687 INFO L478 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2022-03-20 13:00:29,687 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:29,687 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2022-03-20 13:00:29,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-03-20 13:00:29,687 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:00:29,687 INFO L499 BasicCegarLoop]: trace histogram [31, 31, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:00:29,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-20 13:00:29,903 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:00:29,903 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:00:29,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:00:29,903 INFO L85 PathProgramCache]: Analyzing trace with hash 672699853, now seen corresponding path program 63 times [2022-03-20 13:00:29,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:29,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1135879732] [2022-03-20 13:00:29,905 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:00:29,905 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:00:29,905 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:00:29,905 INFO L85 PathProgramCache]: Analyzing trace with hash 672699853, now seen corresponding path program 64 times [2022-03-20 13:00:29,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:00:29,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867715865] [2022-03-20 13:00:29,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:00:29,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:00:29,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:30,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:00:30,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:30,293 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:00:30,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:00:30,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867715865] [2022-03-20 13:00:30,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867715865] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:00:30,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520798903] [2022-03-20 13:00:30,294 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:00:30,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:00:30,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:00:30,295 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:00:30,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-20 13:00:30,428 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:00:30,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:00:30,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-20 13:00:30,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:00:30,566 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:00:30,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:00:31,514 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:00:31,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520798903] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:00:31,514 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:00:31,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 68 [2022-03-20 13:00:31,515 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:00:31,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1135879732] [2022-03-20 13:00:31,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1135879732] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:00:31,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:00:31,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-03-20 13:00:31,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104302510] [2022-03-20 13:00:31,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:00:31,515 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-20 13:00:31,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:31,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-20 13:00:31,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2022-03-20 13:00:31,516 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand has 35 states, 35 states have (on average 2.1142857142857143) internal successors, (74), 34 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:32,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:00:32,514 INFO L93 Difference]: Finished difference Result 221 states and 253 transitions. [2022-03-20 13:00:32,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-20 13:00:32,514 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.1142857142857143) internal successors, (74), 34 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2022-03-20 13:00:32,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:00:32,515 INFO L225 Difference]: With dead ends: 221 [2022-03-20 13:00:32,515 INFO L226 Difference]: Without dead ends: 207 [2022-03-20 13:00:32,516 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=4358, Invalid=5542, Unknown=0, NotChecked=0, Total=9900 [2022-03-20 13:00:32,516 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 430 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:00:32,516 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [430 Valid, 51 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 13:00:32,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-03-20 13:00:32,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 85. [2022-03-20 13:00:32,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.025) internal successors, (82), 80 states have internal predecessors, (82), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:32,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2022-03-20 13:00:32,537 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 82 [2022-03-20 13:00:32,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:00:32,538 INFO L478 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2022-03-20 13:00:32,538 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.1142857142857143) internal successors, (74), 34 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:32,538 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2022-03-20 13:00:32,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-03-20 13:00:32,538 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:00:32,538 INFO L499 BasicCegarLoop]: trace histogram [32, 32, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:00:32,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-20 13:00:32,738 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-03-20 13:00:32,739 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:00:32,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:00:32,739 INFO L85 PathProgramCache]: Analyzing trace with hash 457119087, now seen corresponding path program 65 times [2022-03-20 13:00:32,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:32,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1445512245] [2022-03-20 13:00:32,740 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:00:32,740 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:00:32,740 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:00:32,740 INFO L85 PathProgramCache]: Analyzing trace with hash 457119087, now seen corresponding path program 66 times [2022-03-20 13:00:32,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:00:32,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47152147] [2022-03-20 13:00:32,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:00:32,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:00:32,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:33,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:00:33,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:33,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:00:33,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:00:33,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47152147] [2022-03-20 13:00:33,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47152147] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:00:33,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123681127] [2022-03-20 13:00:33,137 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:00:33,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:00:33,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:00:33,138 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:00:33,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-20 13:00:33,274 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 13:00:33,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:00:33,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 13:00:33,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:00:33,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2022-03-20 13:00:33,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:00:33,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2022-03-20 13:00:33,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123681127] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:00:33,518 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:00:33,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 7, 7] total 42 [2022-03-20 13:00:33,518 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:00:33,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1445512245] [2022-03-20 13:00:33,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1445512245] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:00:33,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:00:33,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-03-20 13:00:33,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000666453] [2022-03-20 13:00:33,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:00:33,518 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-20 13:00:33,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:33,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-20 13:00:33,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=747, Invalid=975, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 13:00:33,519 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:34,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:00:34,724 INFO L93 Difference]: Finished difference Result 227 states and 260 transitions. [2022-03-20 13:00:34,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-20 13:00:34,724 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 84 [2022-03-20 13:00:34,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:00:34,725 INFO L225 Difference]: With dead ends: 227 [2022-03-20 13:00:34,725 INFO L226 Difference]: Without dead ends: 213 [2022-03-20 13:00:34,725 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 163 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2035, Invalid=3515, Unknown=0, NotChecked=0, Total=5550 [2022-03-20 13:00:34,726 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 490 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 13:00:34,726 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [490 Valid, 31 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 13:00:34,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-03-20 13:00:34,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 87. [2022-03-20 13:00:34,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.024390243902439) internal successors, (84), 82 states have internal predecessors, (84), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:34,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2022-03-20 13:00:34,756 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 84 [2022-03-20 13:00:34,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:00:34,756 INFO L478 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2022-03-20 13:00:34,757 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:34,757 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2022-03-20 13:00:34,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-20 13:00:34,757 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:00:34,757 INFO L499 BasicCegarLoop]: trace histogram [33, 33, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:00:34,773 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-03-20 13:00:34,957 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-03-20 13:00:34,958 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:00:34,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:00:34,958 INFO L85 PathProgramCache]: Analyzing trace with hash -557566831, now seen corresponding path program 67 times [2022-03-20 13:00:34,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:34,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1487005818] [2022-03-20 13:00:34,960 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:00:34,960 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:00:34,960 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:00:34,960 INFO L85 PathProgramCache]: Analyzing trace with hash -557566831, now seen corresponding path program 68 times [2022-03-20 13:00:34,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:00:34,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755729306] [2022-03-20 13:00:34,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:00:34,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:00:34,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:35,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:00:35,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:35,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:00:35,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:00:35,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755729306] [2022-03-20 13:00:35,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755729306] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:00:35,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34620248] [2022-03-20 13:00:35,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:00:35,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:00:35,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:00:35,502 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:00:35,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-20 13:00:35,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:00:35,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:00:35,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-20 13:00:35,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:00:35,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:00:35,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:00:36,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:00:36,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34620248] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:00:36,927 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:00:36,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 72 [2022-03-20 13:00:36,928 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:00:36,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1487005818] [2022-03-20 13:00:36,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1487005818] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:00:36,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:00:36,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-03-20 13:00:36,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348110988] [2022-03-20 13:00:36,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:00:36,929 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-20 13:00:36,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:36,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-20 13:00:36,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2022-03-20 13:00:36,930 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand has 37 states, 37 states have (on average 2.108108108108108) internal successors, (78), 36 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:38,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:00:38,209 INFO L93 Difference]: Finished difference Result 233 states and 267 transitions. [2022-03-20 13:00:38,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-20 13:00:38,209 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.108108108108108) internal successors, (78), 36 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2022-03-20 13:00:38,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:00:38,210 INFO L225 Difference]: With dead ends: 233 [2022-03-20 13:00:38,210 INFO L226 Difference]: Without dead ends: 219 [2022-03-20 13:00:38,210 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 758 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4902, Invalid=6228, Unknown=0, NotChecked=0, Total=11130 [2022-03-20 13:00:38,211 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 494 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 13:00:38,211 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [494 Valid, 36 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 13:00:38,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-03-20 13:00:38,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 89. [2022-03-20 13:00:38,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.0238095238095237) internal successors, (86), 84 states have internal predecessors, (86), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:38,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2022-03-20 13:00:38,236 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 86 [2022-03-20 13:00:38,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:00:38,236 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2022-03-20 13:00:38,236 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.108108108108108) internal successors, (78), 36 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:38,236 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2022-03-20 13:00:38,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-03-20 13:00:38,237 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:00:38,237 INFO L499 BasicCegarLoop]: trace histogram [34, 34, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:00:38,254 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-03-20 13:00:38,443 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-03-20 13:00:38,443 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:00:38,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:00:38,444 INFO L85 PathProgramCache]: Analyzing trace with hash -713157837, now seen corresponding path program 69 times [2022-03-20 13:00:38,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:38,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [368374163] [2022-03-20 13:00:38,445 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:00:38,445 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:00:38,445 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:00:38,445 INFO L85 PathProgramCache]: Analyzing trace with hash -713157837, now seen corresponding path program 70 times [2022-03-20 13:00:38,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:00:38,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209033214] [2022-03-20 13:00:38,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:00:38,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:00:38,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:38,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:00:38,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:38,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1163 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:00:38,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:00:38,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209033214] [2022-03-20 13:00:38,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209033214] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:00:38,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466165031] [2022-03-20 13:00:38,863 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:00:38,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:00:38,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:00:38,864 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:00:38,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-20 13:00:39,036 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:00:39,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:00:39,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-20 13:00:39,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:00:39,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1163 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:00:39,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:00:40,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1163 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:00:40,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466165031] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:00:40,314 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:00:40,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 74 [2022-03-20 13:00:40,314 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:00:40,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [368374163] [2022-03-20 13:00:40,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [368374163] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:00:40,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:00:40,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-03-20 13:00:40,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039080977] [2022-03-20 13:00:40,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:00:40,315 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-20 13:00:40,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:40,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-20 13:00:40,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2022-03-20 13:00:40,316 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:41,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:00:41,650 INFO L93 Difference]: Finished difference Result 239 states and 274 transitions. [2022-03-20 13:00:41,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-20 13:00:41,650 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 88 [2022-03-20 13:00:41,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:00:41,651 INFO L225 Difference]: With dead ends: 239 [2022-03-20 13:00:41,651 INFO L226 Difference]: Without dead ends: 225 [2022-03-20 13:00:41,652 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=5186, Invalid=6586, Unknown=0, NotChecked=0, Total=11772 [2022-03-20 13:00:41,652 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 507 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 507 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:00:41,652 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [507 Valid, 36 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 13:00:41,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-03-20 13:00:41,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 91. [2022-03-20 13:00:41,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.0232558139534884) internal successors, (88), 86 states have internal predecessors, (88), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:41,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2022-03-20 13:00:41,678 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 88 [2022-03-20 13:00:41,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:00:41,678 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2022-03-20 13:00:41,678 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:41,678 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2022-03-20 13:00:41,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-03-20 13:00:41,678 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:00:41,678 INFO L499 BasicCegarLoop]: trace histogram [35, 35, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:00:41,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-20 13:00:41,897 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:00:41,898 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:00:41,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:00:41,898 INFO L85 PathProgramCache]: Analyzing trace with hash 87740757, now seen corresponding path program 71 times [2022-03-20 13:00:41,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:41,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [9876484] [2022-03-20 13:00:41,900 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:00:41,900 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:00:41,900 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:00:41,900 INFO L85 PathProgramCache]: Analyzing trace with hash 87740757, now seen corresponding path program 72 times [2022-03-20 13:00:41,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:00:41,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702239264] [2022-03-20 13:00:41,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:00:41,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:00:41,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:42,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:00:42,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:42,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1232 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:00:42,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:00:42,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702239264] [2022-03-20 13:00:42,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702239264] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:00:42,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539386893] [2022-03-20 13:00:42,359 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:00:42,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:00:42,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:00:42,360 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:00:42,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-20 13:00:42,523 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 13:00:42,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:00:42,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 13:00:42,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:00:42,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1232 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2022-03-20 13:00:42,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:00:42,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1232 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2022-03-20 13:00:42,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539386893] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:00:42,789 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:00:42,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 7, 7] total 45 [2022-03-20 13:00:42,789 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:00:42,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [9876484] [2022-03-20 13:00:42,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [9876484] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:00:42,789 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:00:42,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-03-20 13:00:42,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723013456] [2022-03-20 13:00:42,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:00:42,790 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-20 13:00:42,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:42,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-20 13:00:42,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=867, Invalid=1113, Unknown=0, NotChecked=0, Total=1980 [2022-03-20 13:00:42,791 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand has 39 states, 39 states have (on average 2.1025641025641026) internal successors, (82), 38 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:44,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:00:44,232 INFO L93 Difference]: Finished difference Result 245 states and 281 transitions. [2022-03-20 13:00:44,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-20 13:00:44,232 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.1025641025641026) internal successors, (82), 38 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 90 [2022-03-20 13:00:44,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:00:44,233 INFO L225 Difference]: With dead ends: 245 [2022-03-20 13:00:44,233 INFO L226 Difference]: Without dead ends: 231 [2022-03-20 13:00:44,233 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 175 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2380, Invalid=4100, Unknown=0, NotChecked=0, Total=6480 [2022-03-20 13:00:44,233 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 575 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 575 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 13:00:44,234 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [575 Valid, 31 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 13:00:44,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-03-20 13:00:44,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 93. [2022-03-20 13:00:44,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 88 states have (on average 1.0227272727272727) internal successors, (90), 88 states have internal predecessors, (90), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:44,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2022-03-20 13:00:44,261 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 90 [2022-03-20 13:00:44,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:00:44,261 INFO L478 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2022-03-20 13:00:44,261 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.1025641025641026) internal successors, (82), 38 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:44,262 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2022-03-20 13:00:44,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-03-20 13:00:44,262 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:00:44,262 INFO L499 BasicCegarLoop]: trace histogram [36, 36, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:00:44,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-20 13:00:44,462 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-20 13:00:44,462 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:00:44,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:00:44,463 INFO L85 PathProgramCache]: Analyzing trace with hash 952143607, now seen corresponding path program 73 times [2022-03-20 13:00:44,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:44,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [816665109] [2022-03-20 13:00:44,464 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:00:44,464 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:00:44,464 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:00:44,464 INFO L85 PathProgramCache]: Analyzing trace with hash 952143607, now seen corresponding path program 74 times [2022-03-20 13:00:44,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:00:44,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83555331] [2022-03-20 13:00:44,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:00:44,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:00:44,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:44,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:00:44,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:44,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1303 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:00:44,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:00:44,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83555331] [2022-03-20 13:00:44,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83555331] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:00:44,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999477356] [2022-03-20 13:00:44,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:00:44,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:00:44,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:00:44,935 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:00:44,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-20 13:00:45,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:00:45,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:00:45,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-20 13:00:45,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:00:45,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1303 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:00:45,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:00:46,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1303 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:00:46,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999477356] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:00:46,493 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:00:46,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 78 [2022-03-20 13:00:46,493 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:00:46,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [816665109] [2022-03-20 13:00:46,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [816665109] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:00:46,493 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:00:46,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-03-20 13:00:46,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247987235] [2022-03-20 13:00:46,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:00:46,493 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-20 13:00:46,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:46,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-20 13:00:46,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2022-03-20 13:00:46,495 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand has 40 states, 40 states have (on average 2.1) internal successors, (84), 39 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:47,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:00:47,928 INFO L93 Difference]: Finished difference Result 251 states and 288 transitions. [2022-03-20 13:00:47,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-20 13:00:47,929 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.1) internal successors, (84), 39 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2022-03-20 13:00:47,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:00:47,929 INFO L225 Difference]: With dead ends: 251 [2022-03-20 13:00:47,930 INFO L226 Difference]: Without dead ends: 237 [2022-03-20 13:00:47,930 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=5778, Invalid=7332, Unknown=0, NotChecked=0, Total=13110 [2022-03-20 13:00:47,930 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 556 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 556 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:00:47,931 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [556 Valid, 36 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 13:00:47,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-03-20 13:00:47,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 95. [2022-03-20 13:00:47,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.0222222222222221) internal successors, (92), 90 states have internal predecessors, (92), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:47,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2022-03-20 13:00:47,961 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 92 [2022-03-20 13:00:47,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:00:47,961 INFO L478 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2022-03-20 13:00:47,961 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.1) internal successors, (84), 39 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:47,961 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2022-03-20 13:00:47,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-03-20 13:00:47,961 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:00:47,961 INFO L499 BasicCegarLoop]: trace histogram [37, 37, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:00:47,979 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-03-20 13:00:48,179 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-20 13:00:48,179 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:00:48,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:00:48,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1580372967, now seen corresponding path program 75 times [2022-03-20 13:00:48,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:48,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1715699142] [2022-03-20 13:00:48,181 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:00:48,181 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:00:48,181 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:00:48,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1580372967, now seen corresponding path program 76 times [2022-03-20 13:00:48,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:00:48,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844682097] [2022-03-20 13:00:48,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:00:48,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:00:48,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:48,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:00:48,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:48,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1376 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:00:48,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:00:48,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844682097] [2022-03-20 13:00:48,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844682097] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:00:48,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579448701] [2022-03-20 13:00:48,732 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:00:48,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:00:48,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:00:48,734 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:00:48,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-20 13:00:48,903 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:00:48,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:00:48,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-20 13:00:48,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:00:49,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1376 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:00:49,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:00:50,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1376 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:00:50,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579448701] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:00:50,400 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:00:50,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 80 [2022-03-20 13:00:50,401 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:00:50,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1715699142] [2022-03-20 13:00:50,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1715699142] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:00:50,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:00:50,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-03-20 13:00:50,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58335354] [2022-03-20 13:00:50,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:00:50,401 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-20 13:00:50,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:50,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-20 13:00:50,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2022-03-20 13:00:50,402 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand has 41 states, 41 states have (on average 2.097560975609756) internal successors, (86), 40 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:52,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:00:52,041 INFO L93 Difference]: Finished difference Result 257 states and 295 transitions. [2022-03-20 13:00:52,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-20 13:00:52,041 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.097560975609756) internal successors, (86), 40 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 94 [2022-03-20 13:00:52,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:00:52,042 INFO L225 Difference]: With dead ends: 257 [2022-03-20 13:00:52,042 INFO L226 Difference]: Without dead ends: 243 [2022-03-20 13:00:52,045 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=6086, Invalid=7720, Unknown=0, NotChecked=0, Total=13806 [2022-03-20 13:00:52,045 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 849 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 344 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 849 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 344 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 13:00:52,045 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [849 Valid, 31 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [344 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 13:00:52,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-03-20 13:00:52,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 97. [2022-03-20 13:00:52,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.0217391304347827) internal successors, (94), 92 states have internal predecessors, (94), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:52,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2022-03-20 13:00:52,090 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 94 [2022-03-20 13:00:52,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:00:52,090 INFO L478 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2022-03-20 13:00:52,090 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.097560975609756) internal successors, (86), 40 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:52,091 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2022-03-20 13:00:52,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-03-20 13:00:52,091 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:00:52,091 INFO L499 BasicCegarLoop]: trace histogram [38, 38, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:00:52,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-20 13:00:52,291 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:00:52,292 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:00:52,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:00:52,292 INFO L85 PathProgramCache]: Analyzing trace with hash -82343749, now seen corresponding path program 77 times [2022-03-20 13:00:52,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:52,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [420878971] [2022-03-20 13:00:52,293 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:00:52,293 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:00:52,293 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:00:52,294 INFO L85 PathProgramCache]: Analyzing trace with hash -82343749, now seen corresponding path program 78 times [2022-03-20 13:00:52,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:00:52,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136474418] [2022-03-20 13:00:52,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:00:52,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:00:52,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:52,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:00:52,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:52,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1451 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:00:52,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:00:52,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136474418] [2022-03-20 13:00:52,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136474418] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:00:52,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272249346] [2022-03-20 13:00:52,811 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:00:52,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:00:52,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:00:52,812 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:00:52,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-20 13:00:52,968 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 13:00:52,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:00:52,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 13:00:52,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:00:53,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1451 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1444 trivial. 0 not checked. [2022-03-20 13:00:53,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:00:53,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1451 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1444 trivial. 0 not checked. [2022-03-20 13:00:53,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272249346] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:00:53,261 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:00:53,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 7, 7] total 48 [2022-03-20 13:00:53,261 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:00:53,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [420878971] [2022-03-20 13:00:53,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [420878971] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:00:53,261 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:00:53,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-03-20 13:00:53,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408127479] [2022-03-20 13:00:53,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:00:53,262 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-20 13:00:53,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:53,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-20 13:00:53,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=996, Invalid=1260, Unknown=0, NotChecked=0, Total=2256 [2022-03-20 13:00:53,262 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand has 42 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 41 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:54,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:00:54,915 INFO L93 Difference]: Finished difference Result 263 states and 302 transitions. [2022-03-20 13:00:54,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-20 13:00:54,916 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 41 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 96 [2022-03-20 13:00:54,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:00:54,917 INFO L225 Difference]: With dead ends: 263 [2022-03-20 13:00:54,917 INFO L226 Difference]: Without dead ends: 249 [2022-03-20 13:00:54,917 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 187 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1016 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2752, Invalid=4730, Unknown=0, NotChecked=0, Total=7482 [2022-03-20 13:00:54,917 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 527 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:00:54,917 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [527 Valid, 51 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 13:00:54,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-03-20 13:00:54,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 99. [2022-03-20 13:00:54,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.0212765957446808) internal successors, (96), 94 states have internal predecessors, (96), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:54,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2022-03-20 13:00:54,951 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 96 [2022-03-20 13:00:54,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:00:54,951 INFO L478 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2022-03-20 13:00:54,951 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 41 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:54,951 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2022-03-20 13:00:54,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-03-20 13:00:54,951 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:00:54,951 INFO L499 BasicCegarLoop]: trace histogram [39, 39, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:00:54,971 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-03-20 13:00:55,160 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-03-20 13:00:55,160 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:00:55,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:00:55,161 INFO L85 PathProgramCache]: Analyzing trace with hash 709690589, now seen corresponding path program 79 times [2022-03-20 13:00:55,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:55,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [172751151] [2022-03-20 13:00:55,162 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:00:55,162 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:00:55,162 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:00:55,162 INFO L85 PathProgramCache]: Analyzing trace with hash 709690589, now seen corresponding path program 80 times [2022-03-20 13:00:55,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:00:55,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339816611] [2022-03-20 13:00:55,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:00:55,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:00:55,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:55,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:00:55,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:55,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1528 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:00:55,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:00:55,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339816611] [2022-03-20 13:00:55,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339816611] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:00:55,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34439351] [2022-03-20 13:00:55,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:00:55,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:00:55,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:00:55,734 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:00:55,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-20 13:00:55,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:00:55,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:00:55,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-20 13:00:55,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:00:56,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1528 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:00:56,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:00:57,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1528 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:00:57,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34439351] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:00:57,491 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:00:57,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 84 [2022-03-20 13:00:57,491 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:00:57,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [172751151] [2022-03-20 13:00:57,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [172751151] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:00:57,491 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:00:57,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-03-20 13:00:57,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666678781] [2022-03-20 13:00:57,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:00:57,491 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-20 13:00:57,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:57,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-20 13:00:57,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2022-03-20 13:00:57,492 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand has 43 states, 43 states have (on average 2.0930232558139537) internal successors, (90), 42 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:59,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:00:59,232 INFO L93 Difference]: Finished difference Result 269 states and 309 transitions. [2022-03-20 13:00:59,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-20 13:00:59,232 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0930232558139537) internal successors, (90), 42 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 98 [2022-03-20 13:00:59,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:00:59,233 INFO L225 Difference]: With dead ends: 269 [2022-03-20 13:00:59,233 INFO L226 Difference]: Without dead ends: 255 [2022-03-20 13:00:59,234 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1013 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=6726, Invalid=8526, Unknown=0, NotChecked=0, Total=15252 [2022-03-20 13:00:59,234 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 644 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 273 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 644 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 273 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:00:59,234 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [644 Valid, 31 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [273 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 13:00:59,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-03-20 13:00:59,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 101. [2022-03-20 13:00:59,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.0208333333333333) internal successors, (98), 96 states have internal predecessors, (98), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:59,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2022-03-20 13:00:59,270 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 98 [2022-03-20 13:00:59,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:00:59,271 INFO L478 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2022-03-20 13:00:59,271 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.0930232558139537) internal successors, (90), 42 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:00:59,271 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2022-03-20 13:00:59,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-03-20 13:00:59,271 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:00:59,272 INFO L499 BasicCegarLoop]: trace histogram [40, 40, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:00:59,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-20 13:00:59,476 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:00:59,477 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:00:59,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:00:59,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1645478015, now seen corresponding path program 81 times [2022-03-20 13:00:59,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:59,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1163815283] [2022-03-20 13:00:59,478 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:00:59,478 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:00:59,478 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:00:59,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1645478015, now seen corresponding path program 82 times [2022-03-20 13:00:59,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:00:59,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343807307] [2022-03-20 13:00:59,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:00:59,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:00:59,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:00,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:01:00,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:00,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1607 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:01:00,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:01:00,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343807307] [2022-03-20 13:01:00,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343807307] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:01:00,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915856280] [2022-03-20 13:01:00,041 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:01:00,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:01:00,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:01:00,042 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:01:00,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-20 13:01:00,257 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:01:00,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:01:00,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-20 13:01:00,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:01:00,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1607 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:01:00,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:01:01,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1607 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:01:01,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915856280] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:01:01,893 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:01:01,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43, 43] total 86 [2022-03-20 13:01:01,893 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:01:01,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1163815283] [2022-03-20 13:01:01,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1163815283] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:01:01,894 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:01:01,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-03-20 13:01:01,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612501867] [2022-03-20 13:01:01,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:01:01,894 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-20 13:01:01,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:01:01,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-20 13:01:01,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2022-03-20 13:01:01,895 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 43 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:01:03,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:01:03,783 INFO L93 Difference]: Finished difference Result 275 states and 316 transitions. [2022-03-20 13:01:03,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-20 13:01:03,783 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 43 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 100 [2022-03-20 13:01:03,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:01:03,787 INFO L225 Difference]: With dead ends: 275 [2022-03-20 13:01:03,787 INFO L226 Difference]: Without dead ends: 261 [2022-03-20 13:01:03,788 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1059 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=7058, Invalid=8944, Unknown=0, NotChecked=0, Total=16002 [2022-03-20 13:01:03,788 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 497 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 497 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 13:01:03,788 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [497 Valid, 61 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 13:01:03,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-03-20 13:01:03,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 103. [2022-03-20 13:01:03,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.0204081632653061) internal successors, (100), 98 states have internal predecessors, (100), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:01:03,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2022-03-20 13:01:03,828 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 100 [2022-03-20 13:01:03,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:01:03,828 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2022-03-20 13:01:03,828 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 43 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:01:03,829 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2022-03-20 13:01:03,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 13:01:03,829 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:01:03,829 INFO L499 BasicCegarLoop]: trace histogram [41, 41, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:01:03,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-20 13:01:04,043 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:01:04,043 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:01:04,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:01:04,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1005937759, now seen corresponding path program 83 times [2022-03-20 13:01:04,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:01:04,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [243691927] [2022-03-20 13:01:04,045 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:01:04,045 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:01:04,045 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:01:04,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1005937759, now seen corresponding path program 84 times [2022-03-20 13:01:04,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:01:04,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468972323] [2022-03-20 13:01:04,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:01:04,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:01:04,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:04,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:01:04,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:04,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1688 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:01:04,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:01:04,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468972323] [2022-03-20 13:01:04,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468972323] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:01:04,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056165285] [2022-03-20 13:01:04,639 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:01:04,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:01:04,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:01:04,641 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:01:04,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-20 13:01:04,846 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 13:01:04,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:01:04,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 13:01:04,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:01:04,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1688 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1681 trivial. 0 not checked. [2022-03-20 13:01:04,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:01:05,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1688 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1681 trivial. 0 not checked. [2022-03-20 13:01:05,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056165285] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:01:05,175 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:01:05,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 7, 7] total 51 [2022-03-20 13:01:05,175 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:01:05,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [243691927] [2022-03-20 13:01:05,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [243691927] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:01:05,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:01:05,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-03-20 13:01:05,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511755569] [2022-03-20 13:01:05,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:01:05,176 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-20 13:01:05,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:01:05,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-20 13:01:05,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1134, Invalid=1416, Unknown=0, NotChecked=0, Total=2550 [2022-03-20 13:01:05,177 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand has 45 states, 45 states have (on average 2.088888888888889) internal successors, (94), 44 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:01:07,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:01:07,290 INFO L93 Difference]: Finished difference Result 281 states and 323 transitions. [2022-03-20 13:01:07,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-20 13:01:07,291 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.088888888888889) internal successors, (94), 44 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-20 13:01:07,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:01:07,291 INFO L225 Difference]: With dead ends: 281 [2022-03-20 13:01:07,292 INFO L226 Difference]: Without dead ends: 267 [2022-03-20 13:01:07,292 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 199 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1157 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3151, Invalid=5405, Unknown=0, NotChecked=0, Total=8556 [2022-03-20 13:01:07,292 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 505 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 505 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 13:01:07,292 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [505 Valid, 71 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 13:01:07,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-03-20 13:01:07,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 105. [2022-03-20 13:01:07,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.02) internal successors, (102), 100 states have internal predecessors, (102), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:01:07,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2022-03-20 13:01:07,332 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 102 [2022-03-20 13:01:07,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:01:07,332 INFO L478 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2022-03-20 13:01:07,332 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.088888888888889) internal successors, (94), 44 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:01:07,332 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2022-03-20 13:01:07,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-03-20 13:01:07,332 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:01:07,332 INFO L499 BasicCegarLoop]: trace histogram [42, 42, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:01:07,349 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-03-20 13:01:07,533 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-03-20 13:01:07,533 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:01:07,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:01:07,533 INFO L85 PathProgramCache]: Analyzing trace with hash -2100890045, now seen corresponding path program 85 times [2022-03-20 13:01:07,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:01:07,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1743678861] [2022-03-20 13:01:07,535 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:01:07,535 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:01:07,535 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:01:07,535 INFO L85 PathProgramCache]: Analyzing trace with hash -2100890045, now seen corresponding path program 86 times [2022-03-20 13:01:07,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:01:07,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397887279] [2022-03-20 13:01:07,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:01:07,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:01:07,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:08,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:01:08,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:08,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:01:08,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:01:08,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397887279] [2022-03-20 13:01:08,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397887279] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:01:08,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721061464] [2022-03-20 13:01:08,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:01:08,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:01:08,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:01:08,158 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:01:08,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-20 13:01:08,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:01:08,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:01:08,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-20 13:01:08,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:01:08,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:01:08,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:01:10,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:01:10,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721061464] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:01:10,243 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:01:10,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45, 45] total 90 [2022-03-20 13:01:10,243 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:01:10,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1743678861] [2022-03-20 13:01:10,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1743678861] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:01:10,244 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:01:10,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-03-20 13:01:10,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138799068] [2022-03-20 13:01:10,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:01:10,244 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-20 13:01:10,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:01:10,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-20 13:01:10,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2022-03-20 13:01:10,245 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand has 46 states, 46 states have (on average 2.0869565217391304) internal successors, (96), 45 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:01:12,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:01:12,449 INFO L93 Difference]: Finished difference Result 287 states and 330 transitions. [2022-03-20 13:01:12,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-20 13:01:12,449 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0869565217391304) internal successors, (96), 45 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 104 [2022-03-20 13:01:12,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:01:12,450 INFO L225 Difference]: With dead ends: 287 [2022-03-20 13:01:12,450 INFO L226 Difference]: Without dead ends: 273 [2022-03-20 13:01:12,451 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1154 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=7746, Invalid=9810, Unknown=0, NotChecked=0, Total=17556 [2022-03-20 13:01:12,467 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 628 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 270 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 628 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 270 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 13:01:12,468 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [628 Valid, 41 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [270 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 13:01:12,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2022-03-20 13:01:12,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 107. [2022-03-20 13:01:12,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.0196078431372548) internal successors, (104), 102 states have internal predecessors, (104), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:01:12,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2022-03-20 13:01:12,512 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 104 [2022-03-20 13:01:12,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:01:12,512 INFO L478 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2022-03-20 13:01:12,512 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0869565217391304) internal successors, (96), 45 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:01:12,512 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2022-03-20 13:01:12,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-03-20 13:01:12,512 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:01:12,512 INFO L499 BasicCegarLoop]: trace histogram [43, 43, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:01:12,530 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-03-20 13:01:12,713 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-03-20 13:01:12,713 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:01:12,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:01:12,713 INFO L85 PathProgramCache]: Analyzing trace with hash -2083049371, now seen corresponding path program 87 times [2022-03-20 13:01:12,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:01:12,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [350851555] [2022-03-20 13:01:12,715 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:01:12,715 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:01:12,715 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:01:12,715 INFO L85 PathProgramCache]: Analyzing trace with hash -2083049371, now seen corresponding path program 88 times [2022-03-20 13:01:12,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:01:12,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369735886] [2022-03-20 13:01:12,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:01:12,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:01:12,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:13,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:01:13,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:13,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1856 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:01:13,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:01:13,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369735886] [2022-03-20 13:01:13,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369735886] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:01:13,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769968140] [2022-03-20 13:01:13,354 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:01:13,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:01:13,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:01:13,355 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:01:13,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-20 13:01:13,608 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:01:13,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:01:13,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-20 13:01:13,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:01:13,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1856 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:01:13,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:01:15,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1856 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:01:15,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769968140] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:01:15,499 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:01:15,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 92 [2022-03-20 13:01:15,500 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:01:15,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [350851555] [2022-03-20 13:01:15,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [350851555] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:01:15,500 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:01:15,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-03-20 13:01:15,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686955142] [2022-03-20 13:01:15,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:01:15,500 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-20 13:01:15,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:01:15,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-20 13:01:15,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2022-03-20 13:01:15,501 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand has 47 states, 47 states have (on average 2.0851063829787235) internal successors, (98), 46 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:01:17,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:01:17,814 INFO L93 Difference]: Finished difference Result 293 states and 337 transitions. [2022-03-20 13:01:17,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-20 13:01:17,814 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.0851063829787235) internal successors, (98), 46 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 106 [2022-03-20 13:01:17,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:01:17,815 INFO L225 Difference]: With dead ends: 293 [2022-03-20 13:01:17,815 INFO L226 Difference]: Without dead ends: 279 [2022-03-20 13:01:17,816 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=8102, Invalid=10258, Unknown=0, NotChecked=0, Total=18360 [2022-03-20 13:01:17,816 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 590 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 590 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 13:01:17,816 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [590 Valid, 51 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 13:01:17,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-03-20 13:01:17,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 109. [2022-03-20 13:01:17,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 104 states have (on average 1.0192307692307692) internal successors, (106), 104 states have internal predecessors, (106), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:01:17,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2022-03-20 13:01:17,863 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 106 [2022-03-20 13:01:17,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:01:17,863 INFO L478 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2022-03-20 13:01:17,863 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.0851063829787235) internal successors, (98), 46 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:01:17,863 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2022-03-20 13:01:17,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-03-20 13:01:17,864 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:01:17,864 INFO L499 BasicCegarLoop]: trace histogram [44, 44, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:01:17,883 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-03-20 13:01:18,079 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-03-20 13:01:18,079 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:01:18,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:01:18,080 INFO L85 PathProgramCache]: Analyzing trace with hash -2118030841, now seen corresponding path program 89 times [2022-03-20 13:01:18,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:01:18,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [947306194] [2022-03-20 13:01:18,081 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:01:18,081 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:01:18,082 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:01:18,082 INFO L85 PathProgramCache]: Analyzing trace with hash -2118030841, now seen corresponding path program 90 times [2022-03-20 13:01:18,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:01:18,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292864369] [2022-03-20 13:01:18,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:01:18,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:01:18,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:18,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:01:18,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:18,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1943 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:01:18,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:01:18,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292864369] [2022-03-20 13:01:18,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292864369] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:01:18,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319902730] [2022-03-20 13:01:18,748 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:01:18,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:01:18,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:01:18,749 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:01:18,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-20 13:01:18,951 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 13:01:18,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:01:18,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 13:01:18,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:01:19,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1943 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1936 trivial. 0 not checked. [2022-03-20 13:01:19,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:01:19,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1943 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1936 trivial. 0 not checked. [2022-03-20 13:01:19,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319902730] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:01:19,267 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:01:19,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 7, 7] total 54 [2022-03-20 13:01:19,267 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:01:19,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [947306194] [2022-03-20 13:01:19,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [947306194] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:01:19,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:01:19,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-03-20 13:01:19,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031072418] [2022-03-20 13:01:19,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:01:19,280 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-03-20 13:01:19,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:01:19,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-03-20 13:01:19,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1281, Invalid=1581, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 13:01:19,281 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand has 48 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 47 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:01:21,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:01:21,692 INFO L93 Difference]: Finished difference Result 299 states and 344 transitions. [2022-03-20 13:01:21,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-20 13:01:21,693 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 47 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 108 [2022-03-20 13:01:21,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:01:21,694 INFO L225 Difference]: With dead ends: 299 [2022-03-20 13:01:21,694 INFO L226 Difference]: Without dead ends: 285 [2022-03-20 13:01:21,694 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 211 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1307 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3577, Invalid=6125, Unknown=0, NotChecked=0, Total=9702 [2022-03-20 13:01:21,694 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 700 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 297 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 297 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 13:01:21,695 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [700 Valid, 36 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [297 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 13:01:21,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-03-20 13:01:21,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 111. [2022-03-20 13:01:21,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 106 states have (on average 1.0188679245283019) internal successors, (108), 106 states have internal predecessors, (108), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:01:21,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2022-03-20 13:01:21,743 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 108 [2022-03-20 13:01:21,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:01:21,743 INFO L478 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2022-03-20 13:01:21,743 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 47 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:01:21,743 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2022-03-20 13:01:21,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-20 13:01:21,743 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:01:21,743 INFO L499 BasicCegarLoop]: trace histogram [45, 45, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:01:21,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-20 13:01:21,944 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:01:21,944 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:01:21,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:01:21,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1375485143, now seen corresponding path program 91 times [2022-03-20 13:01:21,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:01:21,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1059854643] [2022-03-20 13:01:21,946 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:01:21,946 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:01:21,946 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:01:21,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1375485143, now seen corresponding path program 92 times [2022-03-20 13:01:21,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:01:21,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752841411] [2022-03-20 13:01:21,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:01:21,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:01:21,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:22,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:01:22,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:22,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2032 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:01:22,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:01:22,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752841411] [2022-03-20 13:01:22,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752841411] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:01:22,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004691981] [2022-03-20 13:01:22,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:01:22,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:01:22,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:01:22,641 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:01:22,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-20 13:01:22,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:01:22,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:01:22,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-20 13:01:22,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:01:23,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2032 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:01:23,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:01:24,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2032 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:01:24,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004691981] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:01:24,914 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:01:24,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 96 [2022-03-20 13:01:24,914 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:01:24,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1059854643] [2022-03-20 13:01:24,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1059854643] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:01:24,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:01:24,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-03-20 13:01:24,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836253947] [2022-03-20 13:01:24,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:01:24,915 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-20 13:01:24,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:01:24,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-20 13:01:24,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2022-03-20 13:01:24,916 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand has 49 states, 49 states have (on average 2.0816326530612246) internal successors, (102), 48 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:01:27,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:01:27,452 INFO L93 Difference]: Finished difference Result 305 states and 351 transitions. [2022-03-20 13:01:27,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-20 13:01:27,452 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.0816326530612246) internal successors, (102), 48 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 110 [2022-03-20 13:01:27,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:01:27,453 INFO L225 Difference]: With dead ends: 305 [2022-03-20 13:01:27,453 INFO L226 Difference]: Without dead ends: 291 [2022-03-20 13:01:27,454 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1304 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=8838, Invalid=11184, Unknown=0, NotChecked=0, Total=20022 [2022-03-20 13:01:27,454 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 680 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 291 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 680 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 291 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 13:01:27,454 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [680 Valid, 51 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [291 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 13:01:27,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-03-20 13:01:27,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 113. [2022-03-20 13:01:27,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 108 states have (on average 1.0185185185185186) internal successors, (110), 108 states have internal predecessors, (110), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:01:27,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2022-03-20 13:01:27,499 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 110 [2022-03-20 13:01:27,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:01:27,500 INFO L478 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2022-03-20 13:01:27,500 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.0816326530612246) internal successors, (102), 48 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:01:27,500 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2022-03-20 13:01:27,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-03-20 13:01:27,500 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:01:27,500 INFO L499 BasicCegarLoop]: trace histogram [46, 46, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:01:27,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-03-20 13:01:27,701 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-03-20 13:01:27,701 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:01:27,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:01:27,702 INFO L85 PathProgramCache]: Analyzing trace with hash -753640501, now seen corresponding path program 93 times [2022-03-20 13:01:27,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:01:27,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2120928238] [2022-03-20 13:01:27,704 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:01:27,704 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:01:27,704 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:01:27,704 INFO L85 PathProgramCache]: Analyzing trace with hash -753640501, now seen corresponding path program 94 times [2022-03-20 13:01:27,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:01:27,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686425913] [2022-03-20 13:01:27,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:01:27,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:01:27,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:28,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:01:28,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:28,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2123 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:01:28,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:01:28,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686425913] [2022-03-20 13:01:28,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686425913] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:01:28,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312160289] [2022-03-20 13:01:28,406 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:01:28,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:01:28,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:01:28,407 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:01:28,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-20 13:01:28,645 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:01:28,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:01:28,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-20 13:01:28,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:01:28,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2123 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:01:28,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:01:30,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2123 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:01:30,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312160289] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:01:30,723 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:01:30,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49, 49] total 98 [2022-03-20 13:01:30,724 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:01:30,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2120928238] [2022-03-20 13:01:30,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2120928238] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:01:30,724 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:01:30,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-03-20 13:01:30,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710515498] [2022-03-20 13:01:30,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:01:30,724 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-03-20 13:01:30,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:01:30,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-03-20 13:01:30,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2022-03-20 13:01:30,725 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand has 50 states, 50 states have (on average 2.08) internal successors, (104), 49 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:01:33,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:01:33,468 INFO L93 Difference]: Finished difference Result 311 states and 358 transitions. [2022-03-20 13:01:33,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-20 13:01:33,469 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.08) internal successors, (104), 49 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 112 [2022-03-20 13:01:33,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:01:33,472 INFO L225 Difference]: With dead ends: 311 [2022-03-20 13:01:33,472 INFO L226 Difference]: Without dead ends: 297 [2022-03-20 13:01:33,472 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1356 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=9218, Invalid=11662, Unknown=0, NotChecked=0, Total=20880 [2022-03-20 13:01:33,473 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 939 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 379 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 939 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 379 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 13:01:33,473 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [939 Valid, 26 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [379 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 13:01:33,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-03-20 13:01:33,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 115. [2022-03-20 13:01:33,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.018181818181818) internal successors, (112), 110 states have internal predecessors, (112), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:01:33,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2022-03-20 13:01:33,539 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 112 [2022-03-20 13:01:33,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:01:33,539 INFO L478 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2022-03-20 13:01:33,540 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.08) internal successors, (104), 49 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:01:33,540 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2022-03-20 13:01:33,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-03-20 13:01:33,540 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:01:33,540 INFO L499 BasicCegarLoop]: trace histogram [47, 47, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:01:33,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-20 13:01:33,748 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-20 13:01:33,748 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:01:33,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:01:33,748 INFO L85 PathProgramCache]: Analyzing trace with hash -161393683, now seen corresponding path program 95 times [2022-03-20 13:01:33,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:01:33,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1917620336] [2022-03-20 13:01:33,750 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:01:33,750 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:01:33,750 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:01:33,750 INFO L85 PathProgramCache]: Analyzing trace with hash -161393683, now seen corresponding path program 96 times [2022-03-20 13:01:33,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:01:33,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694542943] [2022-03-20 13:01:33,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:01:33,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:01:33,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:34,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:01:34,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:34,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2216 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:01:34,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:01:34,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694542943] [2022-03-20 13:01:34,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694542943] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:01:34,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803807960] [2022-03-20 13:01:34,460 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:01:34,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:01:34,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:01:34,461 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:01:34,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-20 13:01:34,672 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 13:01:34,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:01:34,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 13:01:34,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:01:34,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2216 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2209 trivial. 0 not checked. [2022-03-20 13:01:34,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:01:35,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2216 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2209 trivial. 0 not checked. [2022-03-20 13:01:35,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803807960] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:01:35,005 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:01:35,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 7, 7] total 57 [2022-03-20 13:01:35,006 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:01:35,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1917620336] [2022-03-20 13:01:35,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1917620336] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:01:35,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:01:35,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-03-20 13:01:35,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979956710] [2022-03-20 13:01:35,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:01:35,016 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-03-20 13:01:35,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:01:35,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-03-20 13:01:35,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1437, Invalid=1755, Unknown=0, NotChecked=0, Total=3192 [2022-03-20 13:01:35,017 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand has 51 states, 51 states have (on average 2.0784313725490198) internal successors, (106), 50 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:01:37,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:01:37,828 INFO L93 Difference]: Finished difference Result 317 states and 365 transitions. [2022-03-20 13:01:37,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-20 13:01:37,828 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.0784313725490198) internal successors, (106), 50 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 114 [2022-03-20 13:01:37,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:01:37,829 INFO L225 Difference]: With dead ends: 317 [2022-03-20 13:01:37,829 INFO L226 Difference]: Without dead ends: 303 [2022-03-20 13:01:37,830 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 223 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1466 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=4030, Invalid=6890, Unknown=0, NotChecked=0, Total=10920 [2022-03-20 13:01:37,830 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 697 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 300 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 697 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 300 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 13:01:37,830 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [697 Valid, 36 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [300 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 13:01:37,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-03-20 13:01:37,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 117. [2022-03-20 13:01:37,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 112 states have (on average 1.0178571428571428) internal successors, (114), 112 states have internal predecessors, (114), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:01:37,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2022-03-20 13:01:37,883 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 114 [2022-03-20 13:01:37,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:01:37,883 INFO L478 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2022-03-20 13:01:37,883 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.0784313725490198) internal successors, (106), 50 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:01:37,883 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2022-03-20 13:01:37,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-03-20 13:01:37,884 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:01:37,884 INFO L499 BasicCegarLoop]: trace histogram [48, 48, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:01:37,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-20 13:01:38,089 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:01:38,089 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:01:38,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:01:38,089 INFO L85 PathProgramCache]: Analyzing trace with hash 2052115343, now seen corresponding path program 97 times [2022-03-20 13:01:38,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:01:38,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1849568132] [2022-03-20 13:01:38,090 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:01:38,090 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:01:38,091 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:01:38,091 INFO L85 PathProgramCache]: Analyzing trace with hash 2052115343, now seen corresponding path program 98 times [2022-03-20 13:01:38,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:01:38,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068979001] [2022-03-20 13:01:38,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:01:38,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:01:38,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:38,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:01:38,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:38,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2311 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:01:38,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:01:38,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068979001] [2022-03-20 13:01:38,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068979001] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:01:38,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562688400] [2022-03-20 13:01:38,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:01:38,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:01:38,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:01:38,900 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:01:38,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-20 13:01:39,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:01:39,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:01:39,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 50 conjunts are in the unsatisfiable core [2022-03-20 13:01:39,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:01:39,302 INFO L134 CoverageAnalysis]: Checked inductivity of 2311 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:01:39,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:01:41,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2311 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:01:41,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562688400] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:01:41,402 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:01:41,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51, 51] total 102 [2022-03-20 13:01:41,402 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:01:41,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1849568132] [2022-03-20 13:01:41,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1849568132] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:01:41,402 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:01:41,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-03-20 13:01:41,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643780849] [2022-03-20 13:01:41,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:01:41,403 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-03-20 13:01:41,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:01:41,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-03-20 13:01:41,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2022-03-20 13:01:41,404 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand has 52 states, 52 states have (on average 2.076923076923077) internal successors, (108), 51 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:01:44,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:01:44,346 INFO L93 Difference]: Finished difference Result 323 states and 372 transitions. [2022-03-20 13:01:44,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-20 13:01:44,346 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.076923076923077) internal successors, (108), 51 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 116 [2022-03-20 13:01:44,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:01:44,347 INFO L225 Difference]: With dead ends: 323 [2022-03-20 13:01:44,347 INFO L226 Difference]: Without dead ends: 309 [2022-03-20 13:01:44,348 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1463 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=10002, Invalid=12648, Unknown=0, NotChecked=0, Total=22650 [2022-03-20 13:01:44,348 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 760 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 325 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 760 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 13:01:44,348 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [760 Valid, 46 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [325 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 13:01:44,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2022-03-20 13:01:44,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 119. [2022-03-20 13:01:44,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 114 states have (on average 1.0175438596491229) internal successors, (116), 114 states have internal predecessors, (116), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:01:44,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions. [2022-03-20 13:01:44,400 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 116 [2022-03-20 13:01:44,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:01:44,400 INFO L478 AbstractCegarLoop]: Abstraction has 119 states and 120 transitions. [2022-03-20 13:01:44,400 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.076923076923077) internal successors, (108), 51 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:01:44,400 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions. [2022-03-20 13:01:44,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-03-20 13:01:44,401 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:01:44,401 INFO L499 BasicCegarLoop]: trace histogram [49, 49, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:01:44,418 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-03-20 13:01:44,601 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-03-20 13:01:44,601 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:01:44,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:01:44,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1069489487, now seen corresponding path program 99 times [2022-03-20 13:01:44,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:01:44,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1459084370] [2022-03-20 13:01:44,603 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:01:44,603 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:01:44,603 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:01:44,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1069489487, now seen corresponding path program 100 times [2022-03-20 13:01:44,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:01:44,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667487325] [2022-03-20 13:01:44,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:01:44,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:01:44,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:45,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:01:45,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:45,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2408 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:01:45,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:01:45,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667487325] [2022-03-20 13:01:45,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667487325] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:01:45,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718303603] [2022-03-20 13:01:45,438 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:01:45,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:01:45,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:01:45,440 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:01:45,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-20 13:01:45,695 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:01:45,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:01:45,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-20 13:01:45,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:01:45,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2408 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:01:45,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:01:48,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2408 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:01:48,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718303603] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:01:48,066 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:01:48,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52, 52] total 104 [2022-03-20 13:01:48,067 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:01:48,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1459084370] [2022-03-20 13:01:48,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1459084370] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:01:48,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:01:48,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-03-20 13:01:48,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096483494] [2022-03-20 13:01:48,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:01:48,067 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-20 13:01:48,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:01:48,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-20 13:01:48,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 13:01:48,069 INFO L87 Difference]: Start difference. First operand 119 states and 120 transitions. Second operand has 53 states, 53 states have (on average 2.0754716981132075) internal successors, (110), 52 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:01:51,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:01:51,186 INFO L93 Difference]: Finished difference Result 329 states and 379 transitions. [2022-03-20 13:01:51,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-20 13:01:51,186 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.0754716981132075) internal successors, (110), 52 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 118 [2022-03-20 13:01:51,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:01:51,188 INFO L225 Difference]: With dead ends: 329 [2022-03-20 13:01:51,188 INFO L226 Difference]: Without dead ends: 315 [2022-03-20 13:01:51,189 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1518 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=10406, Invalid=13156, Unknown=0, NotChecked=0, Total=23562 [2022-03-20 13:01:51,190 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 757 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 324 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 757 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 324 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 13:01:51,190 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [757 Valid, 26 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [324 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 13:01:51,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2022-03-20 13:01:51,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 121. [2022-03-20 13:01:51,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.0172413793103448) internal successors, (118), 116 states have internal predecessors, (118), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:01:51,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2022-03-20 13:01:51,261 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 118 [2022-03-20 13:01:51,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:01:51,261 INFO L478 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2022-03-20 13:01:51,261 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.0754716981132075) internal successors, (110), 52 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:01:51,261 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2022-03-20 13:01:51,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-03-20 13:01:51,261 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:01:51,262 INFO L499 BasicCegarLoop]: trace histogram [50, 50, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:01:51,283 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-03-20 13:01:51,462 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:01:51,462 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:01:51,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:01:51,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1250408787, now seen corresponding path program 101 times [2022-03-20 13:01:51,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:01:51,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [135470375] [2022-03-20 13:01:51,464 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:01:51,464 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:01:51,464 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:01:51,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1250408787, now seen corresponding path program 102 times [2022-03-20 13:01:51,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:01:51,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641063743] [2022-03-20 13:01:51,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:01:51,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:01:51,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:52,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:01:52,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:52,302 INFO L134 CoverageAnalysis]: Checked inductivity of 2507 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:01:52,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:01:52,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641063743] [2022-03-20 13:01:52,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641063743] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:01:52,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461112641] [2022-03-20 13:01:52,302 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:01:52,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:01:52,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:01:52,303 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:01:52,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-20 13:01:52,535 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 13:01:52,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:01:52,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 13:01:52,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:01:52,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2507 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2500 trivial. 0 not checked. [2022-03-20 13:01:52,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:01:52,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2507 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2500 trivial. 0 not checked. [2022-03-20 13:01:52,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461112641] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:01:52,880 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:01:52,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 7, 7] total 60 [2022-03-20 13:01:52,880 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:01:52,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [135470375] [2022-03-20 13:01:52,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [135470375] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:01:52,880 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:01:52,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-03-20 13:01:52,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531488494] [2022-03-20 13:01:52,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:01:52,880 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-03-20 13:01:52,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:01:52,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-03-20 13:01:52,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1602, Invalid=1938, Unknown=0, NotChecked=0, Total=3540 [2022-03-20 13:01:52,882 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand has 54 states, 54 states have (on average 2.074074074074074) internal successors, (112), 53 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:01:56,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:01:56,124 INFO L93 Difference]: Finished difference Result 335 states and 386 transitions. [2022-03-20 13:01:56,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-20 13:01:56,125 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.074074074074074) internal successors, (112), 53 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 120 [2022-03-20 13:01:56,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:01:56,126 INFO L225 Difference]: With dead ends: 335 [2022-03-20 13:01:56,126 INFO L226 Difference]: Without dead ends: 321 [2022-03-20 13:01:56,126 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 235 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1634 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4510, Invalid=7700, Unknown=0, NotChecked=0, Total=12210 [2022-03-20 13:01:56,127 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 775 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 328 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 775 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 328 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 13:01:56,127 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [775 Valid, 31 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [328 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 13:01:56,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-03-20 13:01:56,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 123. [2022-03-20 13:01:56,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 118 states have (on average 1.0169491525423728) internal successors, (120), 118 states have internal predecessors, (120), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:01:56,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2022-03-20 13:01:56,183 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 120 [2022-03-20 13:01:56,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:01:56,183 INFO L478 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2022-03-20 13:01:56,183 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.074074074074074) internal successors, (112), 53 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:01:56,183 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2022-03-20 13:01:56,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-03-20 13:01:56,184 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:01:56,184 INFO L499 BasicCegarLoop]: trace histogram [51, 51, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:01:56,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-03-20 13:01:56,399 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-03-20 13:01:56,399 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:01:56,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:01:56,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1584623477, now seen corresponding path program 103 times [2022-03-20 13:01:56,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:01:56,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1810274624] [2022-03-20 13:01:56,401 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:01:56,401 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:01:56,401 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:01:56,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1584623477, now seen corresponding path program 104 times [2022-03-20 13:01:56,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:01:56,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114127058] [2022-03-20 13:01:56,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:01:56,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:01:56,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:57,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:01:57,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:57,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2608 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:01:57,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:01:57,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114127058] [2022-03-20 13:01:57,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114127058] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:01:57,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913921279] [2022-03-20 13:01:57,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:01:57,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:01:57,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:01:57,246 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:01:57,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-20 13:01:57,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:01:57,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:01:57,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-20 13:01:57,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:01:57,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2608 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:01:57,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:02:00,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2608 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:02:00,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913921279] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:02:00,000 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:02:00,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54, 54] total 108 [2022-03-20 13:02:00,001 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:02:00,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1810274624] [2022-03-20 13:02:00,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1810274624] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:02:00,001 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:02:00,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-03-20 13:02:00,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595458292] [2022-03-20 13:02:00,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:02:00,001 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-03-20 13:02:00,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:02:00,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-03-20 13:02:00,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5673, Invalid=5883, Unknown=0, NotChecked=0, Total=11556 [2022-03-20 13:02:00,002 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand has 55 states, 55 states have (on average 2.0727272727272728) internal successors, (114), 54 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:02:03,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:02:03,467 INFO L93 Difference]: Finished difference Result 341 states and 393 transitions. [2022-03-20 13:02:03,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-20 13:02:03,471 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.0727272727272728) internal successors, (114), 54 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 122 [2022-03-20 13:02:03,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:02:03,472 INFO L225 Difference]: With dead ends: 341 [2022-03-20 13:02:03,472 INFO L226 Difference]: Without dead ends: 327 [2022-03-20 13:02:03,473 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1631 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=11238, Invalid=14202, Unknown=0, NotChecked=0, Total=25440 [2022-03-20 13:02:03,473 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 827 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 347 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 827 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 347 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 13:02:03,473 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [827 Valid, 31 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [347 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 13:02:03,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-03-20 13:02:03,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 125. [2022-03-20 13:02:03,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.0166666666666666) internal successors, (122), 120 states have internal predecessors, (122), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:02:03,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2022-03-20 13:02:03,533 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 122 [2022-03-20 13:02:03,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:02:03,533 INFO L478 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2022-03-20 13:02:03,534 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.0727272727272728) internal successors, (114), 54 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:02:03,534 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2022-03-20 13:02:03,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-03-20 13:02:03,534 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:02:03,534 INFO L499 BasicCegarLoop]: trace histogram [52, 52, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:02:03,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-03-20 13:02:03,734 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-03-20 13:02:03,735 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:02:03,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:02:03,735 INFO L85 PathProgramCache]: Analyzing trace with hash 642393367, now seen corresponding path program 105 times [2022-03-20 13:02:03,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:02:03,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1714746580] [2022-03-20 13:02:03,736 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:02:03,736 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:02:03,736 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:02:03,736 INFO L85 PathProgramCache]: Analyzing trace with hash 642393367, now seen corresponding path program 106 times [2022-03-20 13:02:03,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:02:03,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931247339] [2022-03-20 13:02:03,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:02:03,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:02:03,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:04,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:02:04,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:04,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2711 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:02:04,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:02:04,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931247339] [2022-03-20 13:02:04,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931247339] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:02:04,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508893833] [2022-03-20 13:02:04,613 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:02:04,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:02:04,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:02:04,615 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:02:04,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-20 13:02:04,899 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:02:04,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:02:04,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 54 conjunts are in the unsatisfiable core [2022-03-20 13:02:04,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:02:05,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2711 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:02:05,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:02:07,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2711 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:02:07,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508893833] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:02:07,512 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:02:07,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 55, 55] total 110 [2022-03-20 13:02:07,512 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:02:07,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1714746580] [2022-03-20 13:02:07,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1714746580] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:02:07,512 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:02:07,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-03-20 13:02:07,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021050875] [2022-03-20 13:02:07,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:02:07,513 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-03-20 13:02:07,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:02:07,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-03-20 13:02:07,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5888, Invalid=6102, Unknown=0, NotChecked=0, Total=11990 [2022-03-20 13:02:07,514 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand has 56 states, 56 states have (on average 2.0714285714285716) internal successors, (116), 55 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:02:11,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:02:11,205 INFO L93 Difference]: Finished difference Result 347 states and 400 transitions. [2022-03-20 13:02:11,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-20 13:02:11,205 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.0714285714285716) internal successors, (116), 55 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 124 [2022-03-20 13:02:11,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:02:11,206 INFO L225 Difference]: With dead ends: 347 [2022-03-20 13:02:11,206 INFO L226 Difference]: Without dead ends: 333 [2022-03-20 13:02:11,207 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1689 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=11666, Invalid=14740, Unknown=0, NotChecked=0, Total=26406 [2022-03-20 13:02:11,208 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 787 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 335 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 787 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 335 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 13:02:11,208 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [787 Valid, 41 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [335 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 13:02:11,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-03-20 13:02:11,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 127. [2022-03-20 13:02:11,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 122 states have (on average 1.0163934426229508) internal successors, (124), 122 states have internal predecessors, (124), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:02:11,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2022-03-20 13:02:11,279 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 124 [2022-03-20 13:02:11,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:02:11,279 INFO L478 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2022-03-20 13:02:11,279 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.0714285714285716) internal successors, (116), 55 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:02:11,279 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2022-03-20 13:02:11,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-03-20 13:02:11,280 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:02:11,280 INFO L499 BasicCegarLoop]: trace histogram [53, 53, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:02:11,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-03-20 13:02:11,480 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:02:11,480 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:02:11,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:02:11,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1397357113, now seen corresponding path program 107 times [2022-03-20 13:02:11,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:02:11,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1056583144] [2022-03-20 13:02:11,482 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:02:11,482 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:02:11,482 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:02:11,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1397357113, now seen corresponding path program 108 times [2022-03-20 13:02:11,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:02:11,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352881962] [2022-03-20 13:02:11,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:02:11,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:02:11,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:12,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:02:12,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:12,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2816 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:02:12,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:02:12,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352881962] [2022-03-20 13:02:12,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352881962] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:02:12,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441046381] [2022-03-20 13:02:12,370 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:02:12,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:02:12,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:02:12,371 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:02:12,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-20 13:02:12,631 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 13:02:12,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:02:12,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 13:02:12,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:02:12,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2816 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2809 trivial. 0 not checked. [2022-03-20 13:02:12,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:02:12,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2816 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2809 trivial. 0 not checked. [2022-03-20 13:02:12,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441046381] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:02:12,988 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:02:12,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 7, 7] total 63 [2022-03-20 13:02:12,988 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:02:12,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1056583144] [2022-03-20 13:02:12,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1056583144] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:02:12,988 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:02:12,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-03-20 13:02:12,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365799519] [2022-03-20 13:02:12,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:02:12,989 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-03-20 13:02:12,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:02:12,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-03-20 13:02:12,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1776, Invalid=2130, Unknown=0, NotChecked=0, Total=3906 [2022-03-20 13:02:12,990 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand has 57 states, 57 states have (on average 2.0701754385964914) internal successors, (118), 56 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:02:16,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:02:16,771 INFO L93 Difference]: Finished difference Result 353 states and 407 transitions. [2022-03-20 13:02:16,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-20 13:02:16,771 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.0701754385964914) internal successors, (118), 56 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 126 [2022-03-20 13:02:16,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:02:16,772 INFO L225 Difference]: With dead ends: 353 [2022-03-20 13:02:16,772 INFO L226 Difference]: Without dead ends: 339 [2022-03-20 13:02:16,773 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 247 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1811 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=5017, Invalid=8555, Unknown=0, NotChecked=0, Total=13572 [2022-03-20 13:02:16,773 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 812 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 346 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 812 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 346 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 13:02:16,773 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [812 Valid, 36 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [346 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 13:02:16,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2022-03-20 13:02:16,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 129. [2022-03-20 13:02:16,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 124 states have (on average 1.0161290322580645) internal successors, (126), 124 states have internal predecessors, (126), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:02:16,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2022-03-20 13:02:16,837 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 126 [2022-03-20 13:02:16,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:02:16,838 INFO L478 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2022-03-20 13:02:16,838 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.0701754385964914) internal successors, (118), 56 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:02:16,838 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2022-03-20 13:02:16,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-03-20 13:02:16,838 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:02:16,838 INFO L499 BasicCegarLoop]: trace histogram [54, 54, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:02:16,856 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-03-20 13:02:17,039 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:02:17,039 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:02:17,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:02:17,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1068043995, now seen corresponding path program 109 times [2022-03-20 13:02:17,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:02:17,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [660587864] [2022-03-20 13:02:17,040 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:02:17,040 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:02:17,040 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:02:17,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1068043995, now seen corresponding path program 110 times [2022-03-20 13:02:17,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:02:17,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494949629] [2022-03-20 13:02:17,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:02:17,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:02:17,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:17,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:02:17,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:17,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2923 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:02:17,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:02:17,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494949629] [2022-03-20 13:02:17,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494949629] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:02:17,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299337501] [2022-03-20 13:02:17,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:02:17,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:02:17,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:02:17,966 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:02:17,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-20 13:02:18,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:02:18,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:02:18,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 56 conjunts are in the unsatisfiable core [2022-03-20 13:02:18,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:02:18,425 INFO L134 CoverageAnalysis]: Checked inductivity of 2923 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:02:18,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:02:20,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2923 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:02:20,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299337501] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:02:20,975 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:02:20,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 57, 57] total 114 [2022-03-20 13:02:20,975 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:02:20,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [660587864] [2022-03-20 13:02:20,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [660587864] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:02:20,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:02:20,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-03-20 13:02:20,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537708189] [2022-03-20 13:02:20,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:02:20,976 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-03-20 13:02:20,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:02:20,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-03-20 13:02:20,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6330, Invalid=6552, Unknown=0, NotChecked=0, Total=12882 [2022-03-20 13:02:20,977 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand has 58 states, 58 states have (on average 2.0689655172413794) internal successors, (120), 57 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:02:25,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:02:25,086 INFO L93 Difference]: Finished difference Result 359 states and 414 transitions. [2022-03-20 13:02:25,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-20 13:02:25,086 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.0689655172413794) internal successors, (120), 57 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 128 [2022-03-20 13:02:25,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:02:25,087 INFO L225 Difference]: With dead ends: 359 [2022-03-20 13:02:25,087 INFO L226 Difference]: Without dead ends: 345 [2022-03-20 13:02:25,088 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1808 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=12546, Invalid=15846, Unknown=0, NotChecked=0, Total=28392 [2022-03-20 13:02:25,088 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 858 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 363 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 858 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 363 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 13:02:25,088 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [858 Valid, 41 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [363 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 13:02:25,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-03-20 13:02:25,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 131. [2022-03-20 13:02:25,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.0158730158730158) internal successors, (128), 126 states have internal predecessors, (128), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:02:25,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2022-03-20 13:02:25,156 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 128 [2022-03-20 13:02:25,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:02:25,156 INFO L478 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2022-03-20 13:02:25,156 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.0689655172413794) internal successors, (120), 57 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:02:25,156 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2022-03-20 13:02:25,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-03-20 13:02:25,156 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:02:25,156 INFO L499 BasicCegarLoop]: trace histogram [55, 55, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:02:25,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-03-20 13:02:25,357 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:02:25,357 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:02:25,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:02:25,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1869249795, now seen corresponding path program 111 times [2022-03-20 13:02:25,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:02:25,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [935261436] [2022-03-20 13:02:25,358 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:02:25,358 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:02:25,358 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:02:25,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1869249795, now seen corresponding path program 112 times [2022-03-20 13:02:25,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:02:25,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693819178] [2022-03-20 13:02:25,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:02:25,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:02:25,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:26,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:02:26,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:26,303 INFO L134 CoverageAnalysis]: Checked inductivity of 3032 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:02:26,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:02:26,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693819178] [2022-03-20 13:02:26,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693819178] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:02:26,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919466191] [2022-03-20 13:02:26,304 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:02:26,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:02:26,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:02:26,305 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:02:26,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-20 13:02:26,616 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:02:26,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:02:26,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-20 13:02:26,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:02:26,791 INFO L134 CoverageAnalysis]: Checked inductivity of 3032 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:02:26,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:02:29,465 INFO L134 CoverageAnalysis]: Checked inductivity of 3032 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:02:29,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919466191] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:02:29,465 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:02:29,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 58, 58] total 116 [2022-03-20 13:02:29,465 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:02:29,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [935261436] [2022-03-20 13:02:29,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [935261436] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:02:29,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:02:29,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-03-20 13:02:29,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550516593] [2022-03-20 13:02:29,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:02:29,466 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-03-20 13:02:29,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:02:29,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-03-20 13:02:29,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6557, Invalid=6783, Unknown=0, NotChecked=0, Total=13340 [2022-03-20 13:02:29,467 INFO L87 Difference]: Start difference. First operand 131 states and 132 transitions. Second operand has 59 states, 59 states have (on average 2.0677966101694913) internal successors, (122), 58 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:02:33,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:02:33,770 INFO L93 Difference]: Finished difference Result 365 states and 421 transitions. [2022-03-20 13:02:33,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-20 13:02:33,771 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.0677966101694913) internal successors, (122), 58 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 130 [2022-03-20 13:02:33,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:02:33,772 INFO L225 Difference]: With dead ends: 365 [2022-03-20 13:02:33,772 INFO L226 Difference]: Without dead ends: 351 [2022-03-20 13:02:33,773 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1869 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=12998, Invalid=16414, Unknown=0, NotChecked=0, Total=29412 [2022-03-20 13:02:33,773 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 899 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 379 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 899 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 379 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 13:02:33,773 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [899 Valid, 41 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [379 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 13:02:33,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-03-20 13:02:33,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 133. [2022-03-20 13:02:33,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.015625) internal successors, (130), 128 states have internal predecessors, (130), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:02:33,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2022-03-20 13:02:33,843 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 130 [2022-03-20 13:02:33,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:02:33,843 INFO L478 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2022-03-20 13:02:33,843 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.0677966101694913) internal successors, (122), 58 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:02:33,843 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2022-03-20 13:02:33,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-03-20 13:02:33,843 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:02:33,843 INFO L499 BasicCegarLoop]: trace histogram [56, 56, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:02:33,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-03-20 13:02:34,057 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-03-20 13:02:34,057 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:02:34,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:02:34,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1479898783, now seen corresponding path program 113 times [2022-03-20 13:02:34,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:02:34,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1949788016] [2022-03-20 13:02:34,059 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:02:34,059 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:02:34,059 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:02:34,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1479898783, now seen corresponding path program 114 times [2022-03-20 13:02:34,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:02:34,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73700118] [2022-03-20 13:02:34,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:02:34,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:02:34,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:35,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:02:35,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:35,031 INFO L134 CoverageAnalysis]: Checked inductivity of 3143 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:02:35,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:02:35,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73700118] [2022-03-20 13:02:35,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73700118] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:02:35,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019500099] [2022-03-20 13:02:35,031 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:02:35,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:02:35,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:02:35,033 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:02:35,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-20 13:02:35,314 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 13:02:35,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:02:35,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 13:02:35,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:02:35,474 INFO L134 CoverageAnalysis]: Checked inductivity of 3143 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3136 trivial. 0 not checked. [2022-03-20 13:02:35,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:02:35,687 INFO L134 CoverageAnalysis]: Checked inductivity of 3143 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3136 trivial. 0 not checked. [2022-03-20 13:02:35,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019500099] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:02:35,687 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:02:35,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 7, 7] total 66 [2022-03-20 13:02:35,688 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:02:35,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1949788016] [2022-03-20 13:02:35,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1949788016] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:02:35,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:02:35,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-03-20 13:02:35,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907740995] [2022-03-20 13:02:35,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:02:35,688 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-03-20 13:02:35,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:02:35,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-03-20 13:02:35,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1959, Invalid=2331, Unknown=0, NotChecked=0, Total=4290 [2022-03-20 13:02:35,689 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand has 60 states, 60 states have (on average 2.066666666666667) internal successors, (124), 59 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:02:40,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:02:40,112 INFO L93 Difference]: Finished difference Result 371 states and 428 transitions. [2022-03-20 13:02:40,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-20 13:02:40,112 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.066666666666667) internal successors, (124), 59 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 132 [2022-03-20 13:02:40,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:02:40,113 INFO L225 Difference]: With dead ends: 371 [2022-03-20 13:02:40,113 INFO L226 Difference]: Without dead ends: 357 [2022-03-20 13:02:40,114 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 259 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1997 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=5551, Invalid=9455, Unknown=0, NotChecked=0, Total=15006 [2022-03-20 13:02:40,114 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 890 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 376 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 890 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 376 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 13:02:40,114 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [890 Valid, 36 Invalid, 743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [376 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 13:02:40,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2022-03-20 13:02:40,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 135. [2022-03-20 13:02:40,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.0153846153846153) internal successors, (132), 130 states have internal predecessors, (132), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:02:40,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2022-03-20 13:02:40,191 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 132 [2022-03-20 13:02:40,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:02:40,191 INFO L478 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2022-03-20 13:02:40,191 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.066666666666667) internal successors, (124), 59 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:02:40,191 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2022-03-20 13:02:40,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-03-20 13:02:40,192 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:02:40,192 INFO L499 BasicCegarLoop]: trace histogram [57, 57, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:02:40,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-03-20 13:02:40,392 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-03-20 13:02:40,392 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:02:40,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:02:40,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1213789759, now seen corresponding path program 115 times [2022-03-20 13:02:40,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:02:40,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1474553251] [2022-03-20 13:02:40,394 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:02:40,394 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:02:40,394 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:02:40,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1213789759, now seen corresponding path program 116 times [2022-03-20 13:02:40,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:02:40,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846936466] [2022-03-20 13:02:40,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:02:40,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:02:40,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:41,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:02:41,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:41,390 INFO L134 CoverageAnalysis]: Checked inductivity of 3256 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:02:41,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:02:41,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846936466] [2022-03-20 13:02:41,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846936466] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:02:41,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609050720] [2022-03-20 13:02:41,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:02:41,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:02:41,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:02:41,391 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:02:41,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-20 13:02:41,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:02:41,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:02:41,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-20 13:02:41,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:02:41,902 INFO L134 CoverageAnalysis]: Checked inductivity of 3256 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:02:41,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:02:44,792 INFO L134 CoverageAnalysis]: Checked inductivity of 3256 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:02:44,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609050720] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:02:44,792 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:02:44,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 60, 60] total 120 [2022-03-20 13:02:44,792 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:02:44,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1474553251] [2022-03-20 13:02:44,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1474553251] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:02:44,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:02:44,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-03-20 13:02:44,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74948320] [2022-03-20 13:02:44,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:02:44,793 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-03-20 13:02:44,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:02:44,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-03-20 13:02:44,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7023, Invalid=7257, Unknown=0, NotChecked=0, Total=14280 [2022-03-20 13:02:44,795 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand has 61 states, 61 states have (on average 2.0655737704918034) internal successors, (126), 60 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:02:49,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:02:49,553 INFO L93 Difference]: Finished difference Result 377 states and 435 transitions. [2022-03-20 13:02:49,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-20 13:02:49,553 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.0655737704918034) internal successors, (126), 60 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 134 [2022-03-20 13:02:49,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:02:49,554 INFO L225 Difference]: With dead ends: 377 [2022-03-20 13:02:49,554 INFO L226 Difference]: Without dead ends: 363 [2022-03-20 13:02:49,555 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1994 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=13926, Invalid=17580, Unknown=0, NotChecked=0, Total=31506 [2022-03-20 13:02:49,556 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 832 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 358 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 832 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 358 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 13:02:49,556 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [832 Valid, 46 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [358 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 13:02:49,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2022-03-20 13:02:49,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 137. [2022-03-20 13:02:49,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 132 states have (on average 1.0151515151515151) internal successors, (134), 132 states have internal predecessors, (134), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:02:49,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2022-03-20 13:02:49,633 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 134 [2022-03-20 13:02:49,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:02:49,633 INFO L478 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2022-03-20 13:02:49,633 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.0655737704918034) internal successors, (126), 60 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:02:49,633 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2022-03-20 13:02:49,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-03-20 13:02:49,633 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:02:49,633 INFO L499 BasicCegarLoop]: trace histogram [58, 58, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:02:49,652 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-03-20 13:02:49,834 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:02:49,834 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:02:49,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:02:49,834 INFO L85 PathProgramCache]: Analyzing trace with hash 16800867, now seen corresponding path program 117 times [2022-03-20 13:02:49,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:02:49,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [780283876] [2022-03-20 13:02:49,835 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:02:49,835 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:02:49,835 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:02:49,835 INFO L85 PathProgramCache]: Analyzing trace with hash 16800867, now seen corresponding path program 118 times [2022-03-20 13:02:49,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:02:49,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063233662] [2022-03-20 13:02:49,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:02:49,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:02:49,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:50,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:02:50,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:50,881 INFO L134 CoverageAnalysis]: Checked inductivity of 3371 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:02:50,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:02:50,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063233662] [2022-03-20 13:02:50,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063233662] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:02:50,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118350321] [2022-03-20 13:02:50,881 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:02:50,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:02:50,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:02:50,882 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:02:50,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-20 13:02:51,223 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:02:51,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:02:51,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 60 conjunts are in the unsatisfiable core [2022-03-20 13:02:51,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:02:51,402 INFO L134 CoverageAnalysis]: Checked inductivity of 3371 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:02:51,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:02:54,372 INFO L134 CoverageAnalysis]: Checked inductivity of 3371 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:02:54,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118350321] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:02:54,372 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:02:54,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 61, 61] total 122 [2022-03-20 13:02:54,372 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:02:54,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [780283876] [2022-03-20 13:02:54,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [780283876] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:02:54,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:02:54,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-03-20 13:02:54,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45219398] [2022-03-20 13:02:54,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:02:54,373 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-03-20 13:02:54,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:02:54,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-03-20 13:02:54,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7262, Invalid=7500, Unknown=0, NotChecked=0, Total=14762 [2022-03-20 13:02:54,375 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand has 62 states, 62 states have (on average 2.064516129032258) internal successors, (128), 61 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:02:59,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:02:59,460 INFO L93 Difference]: Finished difference Result 383 states and 442 transitions. [2022-03-20 13:02:59,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-20 13:02:59,460 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.064516129032258) internal successors, (128), 61 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 136 [2022-03-20 13:02:59,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:02:59,461 INFO L225 Difference]: With dead ends: 383 [2022-03-20 13:02:59,461 INFO L226 Difference]: Without dead ends: 369 [2022-03-20 13:02:59,462 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2058 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=14402, Invalid=18178, Unknown=0, NotChecked=0, Total=32580 [2022-03-20 13:02:59,463 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 883 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 375 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 883 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 375 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 13:02:59,463 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [883 Valid, 41 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [375 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 13:02:59,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2022-03-20 13:02:59,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 139. [2022-03-20 13:02:59,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 134 states have (on average 1.0149253731343284) internal successors, (136), 134 states have internal predecessors, (136), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:02:59,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 140 transitions. [2022-03-20 13:02:59,547 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 140 transitions. Word has length 136 [2022-03-20 13:02:59,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:02:59,548 INFO L478 AbstractCegarLoop]: Abstraction has 139 states and 140 transitions. [2022-03-20 13:02:59,548 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.064516129032258) internal successors, (128), 61 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:02:59,548 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 140 transitions. [2022-03-20 13:02:59,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-03-20 13:02:59,548 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:02:59,548 INFO L499 BasicCegarLoop]: trace histogram [59, 59, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:02:59,567 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-03-20 13:02:59,748 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:02:59,749 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:02:59,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:02:59,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1498386053, now seen corresponding path program 119 times [2022-03-20 13:02:59,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:02:59,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1476136601] [2022-03-20 13:02:59,750 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:02:59,750 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:02:59,750 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:02:59,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1498386053, now seen corresponding path program 120 times [2022-03-20 13:02:59,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:02:59,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596649350] [2022-03-20 13:02:59,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:02:59,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:02:59,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:00,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:03:00,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:00,816 INFO L134 CoverageAnalysis]: Checked inductivity of 3488 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:03:00,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:03:00,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596649350] [2022-03-20 13:03:00,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596649350] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:03:00,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882606756] [2022-03-20 13:03:00,816 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:03:00,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:03:00,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:03:00,817 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:03:00,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-20 13:03:01,124 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 13:03:01,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:03:01,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 13:03:01,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:03:01,288 INFO L134 CoverageAnalysis]: Checked inductivity of 3488 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3481 trivial. 0 not checked. [2022-03-20 13:03:01,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:03:01,510 INFO L134 CoverageAnalysis]: Checked inductivity of 3488 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3481 trivial. 0 not checked. [2022-03-20 13:03:01,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882606756] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:03:01,510 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:03:01,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 7, 7] total 69 [2022-03-20 13:03:01,511 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:03:01,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1476136601] [2022-03-20 13:03:01,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1476136601] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:03:01,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:03:01,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-03-20 13:03:01,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70826230] [2022-03-20 13:03:01,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:03:01,511 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-03-20 13:03:01,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:01,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-03-20 13:03:01,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2151, Invalid=2541, Unknown=0, NotChecked=0, Total=4692 [2022-03-20 13:03:01,513 INFO L87 Difference]: Start difference. First operand 139 states and 140 transitions. Second operand has 63 states, 63 states have (on average 2.0634920634920637) internal successors, (130), 62 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:06,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:03:06,702 INFO L93 Difference]: Finished difference Result 389 states and 449 transitions. [2022-03-20 13:03:06,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-20 13:03:06,703 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.0634920634920637) internal successors, (130), 62 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 138 [2022-03-20 13:03:06,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:03:06,704 INFO L225 Difference]: With dead ends: 389 [2022-03-20 13:03:06,704 INFO L226 Difference]: Without dead ends: 375 [2022-03-20 13:03:06,705 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 271 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2192 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=6112, Invalid=10400, Unknown=0, NotChecked=0, Total=16512 [2022-03-20 13:03:06,705 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 1145 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 470 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1145 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 470 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 13:03:06,705 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1145 Valid, 31 Invalid, 850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [470 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 13:03:06,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2022-03-20 13:03:06,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 141. [2022-03-20 13:03:06,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 136 states have (on average 1.0147058823529411) internal successors, (138), 136 states have internal predecessors, (138), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:06,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2022-03-20 13:03:06,794 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 138 [2022-03-20 13:03:06,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:03:06,795 INFO L478 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2022-03-20 13:03:06,795 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.0634920634920637) internal successors, (130), 62 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:06,795 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2022-03-20 13:03:06,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-03-20 13:03:06,795 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:03:06,795 INFO L499 BasicCegarLoop]: trace histogram [60, 60, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:03:06,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-03-20 13:03:06,996 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:03:06,996 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:03:06,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:03:06,997 INFO L85 PathProgramCache]: Analyzing trace with hash -627392473, now seen corresponding path program 121 times [2022-03-20 13:03:06,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:06,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [488985728] [2022-03-20 13:03:06,998 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:03:06,998 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:03:06,998 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:03:06,998 INFO L85 PathProgramCache]: Analyzing trace with hash -627392473, now seen corresponding path program 122 times [2022-03-20 13:03:06,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:03:06,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048276592] [2022-03-20 13:03:06,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:03:06,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:03:07,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:08,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:03:08,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:08,111 INFO L134 CoverageAnalysis]: Checked inductivity of 3607 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:03:08,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:03:08,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048276592] [2022-03-20 13:03:08,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048276592] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:03:08,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411696214] [2022-03-20 13:03:08,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:03:08,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:03:08,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:03:08,113 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:03:08,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-20 13:03:08,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:03:08,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:03:08,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 62 conjunts are in the unsatisfiable core [2022-03-20 13:03:08,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:03:08,642 INFO L134 CoverageAnalysis]: Checked inductivity of 3607 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:03:08,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:03:11,840 INFO L134 CoverageAnalysis]: Checked inductivity of 3607 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:03:11,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411696214] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:03:11,841 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:03:11,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 63, 63] total 126 [2022-03-20 13:03:11,841 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:03:11,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [488985728] [2022-03-20 13:03:11,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [488985728] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:03:11,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:03:11,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-03-20 13:03:11,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167917883] [2022-03-20 13:03:11,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:03:11,841 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-03-20 13:03:11,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:11,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-03-20 13:03:11,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7752, Invalid=7998, Unknown=0, NotChecked=0, Total=15750 [2022-03-20 13:03:11,844 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand has 64 states, 64 states have (on average 2.0625) internal successors, (132), 63 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:17,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:03:17,246 INFO L93 Difference]: Finished difference Result 395 states and 456 transitions. [2022-03-20 13:03:17,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-20 13:03:17,246 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.0625) internal successors, (132), 63 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 140 [2022-03-20 13:03:17,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:03:17,247 INFO L225 Difference]: With dead ends: 395 [2022-03-20 13:03:17,247 INFO L226 Difference]: Without dead ends: 381 [2022-03-20 13:03:17,248 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2189 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=15378, Invalid=19404, Unknown=0, NotChecked=0, Total=34782 [2022-03-20 13:03:17,249 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 833 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 362 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 833 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 362 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 13:03:17,249 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [833 Valid, 46 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [362 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 13:03:17,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2022-03-20 13:03:17,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 143. [2022-03-20 13:03:17,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 138 states have (on average 1.0144927536231885) internal successors, (140), 138 states have internal predecessors, (140), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:17,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 144 transitions. [2022-03-20 13:03:17,334 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 144 transitions. Word has length 140 [2022-03-20 13:03:17,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:03:17,334 INFO L478 AbstractCegarLoop]: Abstraction has 143 states and 144 transitions. [2022-03-20 13:03:17,335 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.0625) internal successors, (132), 63 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:17,335 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 144 transitions. [2022-03-20 13:03:17,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-03-20 13:03:17,335 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:03:17,335 INFO L499 BasicCegarLoop]: trace histogram [61, 61, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:03:17,353 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-03-20 13:03:17,535 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:03:17,536 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:03:17,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:03:17,536 INFO L85 PathProgramCache]: Analyzing trace with hash 903876937, now seen corresponding path program 123 times [2022-03-20 13:03:17,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:17,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1184472772] [2022-03-20 13:03:17,537 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:03:17,537 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:03:17,537 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:03:17,537 INFO L85 PathProgramCache]: Analyzing trace with hash 903876937, now seen corresponding path program 124 times [2022-03-20 13:03:17,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:03:17,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768069868] [2022-03-20 13:03:17,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:03:17,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:03:17,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:18,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:03:18,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:18,655 INFO L134 CoverageAnalysis]: Checked inductivity of 3728 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:03:18,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:03:18,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768069868] [2022-03-20 13:03:18,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768069868] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:03:18,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493223030] [2022-03-20 13:03:18,656 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:03:18,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:03:18,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:03:18,657 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:03:18,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-20 13:03:19,024 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:03:19,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:03:19,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 632 conjuncts, 63 conjunts are in the unsatisfiable core [2022-03-20 13:03:19,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:03:19,231 INFO L134 CoverageAnalysis]: Checked inductivity of 3728 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:03:19,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:03:22,511 INFO L134 CoverageAnalysis]: Checked inductivity of 3728 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:03:22,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493223030] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:03:22,511 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:03:22,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 64, 64] total 128 [2022-03-20 13:03:22,511 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:03:22,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1184472772] [2022-03-20 13:03:22,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1184472772] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:03:22,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:03:22,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-03-20 13:03:22,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397109150] [2022-03-20 13:03:22,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:03:22,512 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-03-20 13:03:22,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:22,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-03-20 13:03:22,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8003, Invalid=8253, Unknown=0, NotChecked=0, Total=16256 [2022-03-20 13:03:22,514 INFO L87 Difference]: Start difference. First operand 143 states and 144 transitions. Second operand has 65 states, 65 states have (on average 2.0615384615384613) internal successors, (134), 64 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:28,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:03:28,249 INFO L93 Difference]: Finished difference Result 401 states and 463 transitions. [2022-03-20 13:03:28,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-20 13:03:28,249 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.0615384615384613) internal successors, (134), 64 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 142 [2022-03-20 13:03:28,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:03:28,251 INFO L225 Difference]: With dead ends: 401 [2022-03-20 13:03:28,251 INFO L226 Difference]: Without dead ends: 387 [2022-03-20 13:03:28,252 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2256 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=15878, Invalid=20032, Unknown=0, NotChecked=0, Total=35910 [2022-03-20 13:03:28,252 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 1043 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 436 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1043 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 436 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 13:03:28,252 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1043 Valid, 31 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [436 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 13:03:28,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-03-20 13:03:28,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 145. [2022-03-20 13:03:28,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.0142857142857142) internal successors, (142), 140 states have internal predecessors, (142), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:28,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2022-03-20 13:03:28,348 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 142 [2022-03-20 13:03:28,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:03:28,349 INFO L478 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2022-03-20 13:03:28,349 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.0615384615384613) internal successors, (134), 64 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:28,349 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2022-03-20 13:03:28,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-03-20 13:03:28,349 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:03:28,349 INFO L499 BasicCegarLoop]: trace histogram [62, 62, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:03:28,367 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-03-20 13:03:28,555 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-03-20 13:03:28,555 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:03:28,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:03:28,556 INFO L85 PathProgramCache]: Analyzing trace with hash -720002581, now seen corresponding path program 125 times [2022-03-20 13:03:28,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:28,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [245217523] [2022-03-20 13:03:28,557 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:03:28,557 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:03:28,557 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:03:28,557 INFO L85 PathProgramCache]: Analyzing trace with hash -720002581, now seen corresponding path program 126 times [2022-03-20 13:03:28,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:03:28,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366877889] [2022-03-20 13:03:28,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:03:28,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:03:28,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:29,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:03:29,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:29,713 INFO L134 CoverageAnalysis]: Checked inductivity of 3851 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:03:29,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:03:29,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366877889] [2022-03-20 13:03:29,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366877889] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:03:29,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467121816] [2022-03-20 13:03:29,714 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:03:29,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:03:29,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:03:29,715 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:03:29,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-20 13:03:30,045 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 13:03:30,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:03:30,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 13:03:30,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:03:30,241 INFO L134 CoverageAnalysis]: Checked inductivity of 3851 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3844 trivial. 0 not checked. [2022-03-20 13:03:30,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:03:30,471 INFO L134 CoverageAnalysis]: Checked inductivity of 3851 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3844 trivial. 0 not checked. [2022-03-20 13:03:30,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467121816] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:03:30,472 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:03:30,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 7, 7] total 72 [2022-03-20 13:03:30,472 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:03:30,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [245217523] [2022-03-20 13:03:30,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [245217523] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:03:30,472 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:03:30,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-03-20 13:03:30,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397487600] [2022-03-20 13:03:30,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:03:30,472 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-03-20 13:03:30,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:30,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-03-20 13:03:30,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2352, Invalid=2760, Unknown=0, NotChecked=0, Total=5112 [2022-03-20 13:03:30,474 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand has 66 states, 66 states have (on average 2.0606060606060606) internal successors, (136), 65 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:36,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:03:36,261 INFO L93 Difference]: Finished difference Result 407 states and 470 transitions. [2022-03-20 13:03:36,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-20 13:03:36,261 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.0606060606060606) internal successors, (136), 65 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 144 [2022-03-20 13:03:36,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:03:36,262 INFO L225 Difference]: With dead ends: 407 [2022-03-20 13:03:36,262 INFO L226 Difference]: Without dead ends: 393 [2022-03-20 13:03:36,263 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 283 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2396 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=6700, Invalid=11390, Unknown=0, NotChecked=0, Total=18090 [2022-03-20 13:03:36,263 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 975 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 409 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 975 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 409 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 13:03:36,263 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [975 Valid, 36 Invalid, 812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [409 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 13:03:36,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-03-20 13:03:36,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 147. [2022-03-20 13:03:36,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 142 states have (on average 1.0140845070422535) internal successors, (144), 142 states have internal predecessors, (144), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:36,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 148 transitions. [2022-03-20 13:03:36,368 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 148 transitions. Word has length 144 [2022-03-20 13:03:36,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:03:36,368 INFO L478 AbstractCegarLoop]: Abstraction has 147 states and 148 transitions. [2022-03-20 13:03:36,368 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.0606060606060606) internal successors, (136), 65 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:36,368 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 148 transitions. [2022-03-20 13:03:36,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-03-20 13:03:36,368 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:03:36,369 INFO L499 BasicCegarLoop]: trace histogram [63, 63, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:03:36,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-03-20 13:03:36,590 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:03:36,590 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:03:36,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:03:36,590 INFO L85 PathProgramCache]: Analyzing trace with hash 2099876365, now seen corresponding path program 127 times [2022-03-20 13:03:36,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:36,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [185137557] [2022-03-20 13:03:36,591 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:03:36,592 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:03:36,592 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:03:36,592 INFO L85 PathProgramCache]: Analyzing trace with hash 2099876365, now seen corresponding path program 128 times [2022-03-20 13:03:36,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:03:36,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236074131] [2022-03-20 13:03:36,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:03:36,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:03:36,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:37,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:03:37,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:37,797 INFO L134 CoverageAnalysis]: Checked inductivity of 3976 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:03:37,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:03:37,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236074131] [2022-03-20 13:03:37,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236074131] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:03:37,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901417444] [2022-03-20 13:03:37,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:03:37,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:03:37,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:03:37,798 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:03:37,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-20 13:03:38,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:03:38,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:03:38,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 650 conjuncts, 65 conjunts are in the unsatisfiable core [2022-03-20 13:03:38,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:03:38,374 INFO L134 CoverageAnalysis]: Checked inductivity of 3976 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:03:38,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:03:41,792 INFO L134 CoverageAnalysis]: Checked inductivity of 3976 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:03:41,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901417444] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:03:41,792 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:03:41,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 66, 66] total 132 [2022-03-20 13:03:41,792 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:03:41,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [185137557] [2022-03-20 13:03:41,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [185137557] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:03:41,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:03:41,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-03-20 13:03:41,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504758085] [2022-03-20 13:03:41,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:03:41,793 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-03-20 13:03:41,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:41,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-03-20 13:03:41,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8517, Invalid=8775, Unknown=0, NotChecked=0, Total=17292 [2022-03-20 13:03:41,795 INFO L87 Difference]: Start difference. First operand 147 states and 148 transitions. Second operand has 67 states, 67 states have (on average 2.0597014925373136) internal successors, (138), 66 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:48,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:03:48,026 INFO L93 Difference]: Finished difference Result 413 states and 477 transitions. [2022-03-20 13:03:48,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-20 13:03:48,027 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.0597014925373136) internal successors, (138), 66 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 146 [2022-03-20 13:03:48,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:03:48,028 INFO L225 Difference]: With dead ends: 413 [2022-03-20 13:03:48,028 INFO L226 Difference]: Without dead ends: 399 [2022-03-20 13:03:48,029 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2393 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=16902, Invalid=21318, Unknown=0, NotChecked=0, Total=38220 [2022-03-20 13:03:48,043 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 975 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 417 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 975 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 417 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 13:03:48,043 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [975 Valid, 46 Invalid, 836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [417 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 13:03:48,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2022-03-20 13:03:48,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 149. [2022-03-20 13:03:48,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 144 states have (on average 1.0138888888888888) internal successors, (146), 144 states have internal predecessors, (146), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:48,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2022-03-20 13:03:48,139 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 146 [2022-03-20 13:03:48,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:03:48,139 INFO L478 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2022-03-20 13:03:48,139 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.0597014925373136) internal successors, (138), 66 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:48,139 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2022-03-20 13:03:48,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-03-20 13:03:48,140 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:03:48,140 INFO L499 BasicCegarLoop]: trace histogram [64, 64, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:03:48,158 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-03-20 13:03:48,347 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-03-20 13:03:48,347 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:03:48,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:03:48,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1879179695, now seen corresponding path program 129 times [2022-03-20 13:03:48,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:48,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [389846186] [2022-03-20 13:03:48,348 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:03:48,348 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:03:48,348 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:03:48,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1879179695, now seen corresponding path program 130 times [2022-03-20 13:03:48,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:03:48,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005124181] [2022-03-20 13:03:48,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:03:48,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:03:48,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:49,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:03:49,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:49,563 INFO L134 CoverageAnalysis]: Checked inductivity of 4103 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:03:49,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:03:49,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005124181] [2022-03-20 13:03:49,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005124181] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:03:49,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156026911] [2022-03-20 13:03:49,563 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:03:49,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:03:49,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:03:49,564 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:03:49,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-20 13:03:49,974 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:03:49,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:03:49,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 66 conjunts are in the unsatisfiable core [2022-03-20 13:03:49,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:03:50,182 INFO L134 CoverageAnalysis]: Checked inductivity of 4103 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:03:50,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:03:53,715 INFO L134 CoverageAnalysis]: Checked inductivity of 4103 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:03:53,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156026911] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:03:53,715 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:03:53,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 67, 67] total 134 [2022-03-20 13:03:53,716 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:03:53,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [389846186] [2022-03-20 13:03:53,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [389846186] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:03:53,716 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:03:53,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-03-20 13:03:53,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973873176] [2022-03-20 13:03:53,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:03:53,716 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-03-20 13:03:53,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:53,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-03-20 13:03:53,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8780, Invalid=9042, Unknown=0, NotChecked=0, Total=17822 [2022-03-20 13:03:53,719 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand has 68 states, 68 states have (on average 2.0588235294117645) internal successors, (140), 67 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:04:00,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:04:00,215 INFO L93 Difference]: Finished difference Result 419 states and 484 transitions. [2022-03-20 13:04:00,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-20 13:04:00,215 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.0588235294117645) internal successors, (140), 67 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 148 [2022-03-20 13:04:00,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:04:00,216 INFO L225 Difference]: With dead ends: 419 [2022-03-20 13:04:00,216 INFO L226 Difference]: Without dead ends: 405 [2022-03-20 13:04:00,218 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2463 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=17426, Invalid=21976, Unknown=0, NotChecked=0, Total=39402 [2022-03-20 13:04:00,218 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 947 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 405 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 947 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 405 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 13:04:00,218 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [947 Valid, 36 Invalid, 820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [405 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 13:04:00,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2022-03-20 13:04:00,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 151. [2022-03-20 13:04:00,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 146 states have (on average 1.0136986301369864) internal successors, (148), 146 states have internal predecessors, (148), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:04:00,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 152 transitions. [2022-03-20 13:04:00,316 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 152 transitions. Word has length 148 [2022-03-20 13:04:00,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:04:00,316 INFO L478 AbstractCegarLoop]: Abstraction has 151 states and 152 transitions. [2022-03-20 13:04:00,317 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.0588235294117645) internal successors, (140), 67 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:04:00,317 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 152 transitions. [2022-03-20 13:04:00,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-03-20 13:04:00,317 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:04:00,317 INFO L499 BasicCegarLoop]: trace histogram [65, 65, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:04:00,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-03-20 13:04:00,534 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-03-20 13:04:00,534 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:04:00,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:04:00,534 INFO L85 PathProgramCache]: Analyzing trace with hash 243077329, now seen corresponding path program 131 times [2022-03-20 13:04:00,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:04:00,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1250066366] [2022-03-20 13:04:00,535 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:04:00,536 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:04:00,536 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:04:00,536 INFO L85 PathProgramCache]: Analyzing trace with hash 243077329, now seen corresponding path program 132 times [2022-03-20 13:04:00,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:04:00,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301404265] [2022-03-20 13:04:00,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:04:00,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:04:00,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:04:01,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:04:01,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:04:01,828 INFO L134 CoverageAnalysis]: Checked inductivity of 4232 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:04:01,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:04:01,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301404265] [2022-03-20 13:04:01,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301404265] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:04:01,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671142571] [2022-03-20 13:04:01,828 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:04:01,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:04:01,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:04:01,829 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:04:01,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-20 13:04:02,197 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 13:04:02,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:04:02,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 13:04:02,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:04:02,375 INFO L134 CoverageAnalysis]: Checked inductivity of 4232 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4225 trivial. 0 not checked. [2022-03-20 13:04:02,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:04:02,636 INFO L134 CoverageAnalysis]: Checked inductivity of 4232 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4225 trivial. 0 not checked. [2022-03-20 13:04:02,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671142571] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:04:02,637 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:04:02,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 7, 7] total 75 [2022-03-20 13:04:02,637 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:04:02,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1250066366] [2022-03-20 13:04:02,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1250066366] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:04:02,637 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:04:02,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-03-20 13:04:02,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873705786] [2022-03-20 13:04:02,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:04:02,637 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-03-20 13:04:02,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:04:02,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-03-20 13:04:02,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2562, Invalid=2988, Unknown=0, NotChecked=0, Total=5550 [2022-03-20 13:04:02,639 INFO L87 Difference]: Start difference. First operand 151 states and 152 transitions. Second operand has 69 states, 69 states have (on average 2.0579710144927534) internal successors, (142), 68 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:04:09,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:04:09,311 INFO L93 Difference]: Finished difference Result 425 states and 491 transitions. [2022-03-20 13:04:09,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-20 13:04:09,312 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.0579710144927534) internal successors, (142), 68 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 150 [2022-03-20 13:04:09,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:04:09,313 INFO L225 Difference]: With dead ends: 425 [2022-03-20 13:04:09,313 INFO L226 Difference]: Without dead ends: 411 [2022-03-20 13:04:09,314 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 295 SyntacticMatches, 1 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2609 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=7315, Invalid=12425, Unknown=0, NotChecked=0, Total=19740 [2022-03-20 13:04:09,314 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 1065 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 445 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1065 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 445 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 13:04:09,314 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1065 Valid, 36 Invalid, 865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [445 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 13:04:09,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2022-03-20 13:04:09,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 153. [2022-03-20 13:04:09,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 148 states have (on average 1.0135135135135136) internal successors, (150), 148 states have internal predecessors, (150), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:04:09,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 154 transitions. [2022-03-20 13:04:09,419 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 154 transitions. Word has length 150 [2022-03-20 13:04:09,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:04:09,419 INFO L478 AbstractCegarLoop]: Abstraction has 153 states and 154 transitions. [2022-03-20 13:04:09,420 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.0579710144927534) internal successors, (142), 68 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:04:09,420 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 154 transitions. [2022-03-20 13:04:09,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-03-20 13:04:09,420 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:04:09,420 INFO L499 BasicCegarLoop]: trace histogram [66, 66, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:04:09,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-03-20 13:04:09,635 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-03-20 13:04:09,635 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:04:09,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:04:09,635 INFO L85 PathProgramCache]: Analyzing trace with hash -93266061, now seen corresponding path program 133 times [2022-03-20 13:04:09,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:04:09,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2060557471] [2022-03-20 13:04:09,636 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:04:09,636 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:04:09,636 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:04:09,637 INFO L85 PathProgramCache]: Analyzing trace with hash -93266061, now seen corresponding path program 134 times [2022-03-20 13:04:09,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:04:09,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485266176] [2022-03-20 13:04:09,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:04:09,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:04:09,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:04:10,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:04:10,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:04:10,957 INFO L134 CoverageAnalysis]: Checked inductivity of 4363 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:04:10,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:04:10,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485266176] [2022-03-20 13:04:10,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485266176] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:04:10,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677998687] [2022-03-20 13:04:10,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:04:10,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:04:10,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:04:10,959 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:04:10,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-20 13:04:11,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:04:11,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:04:11,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 677 conjuncts, 68 conjunts are in the unsatisfiable core [2022-03-20 13:04:11,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:04:11,596 INFO L134 CoverageAnalysis]: Checked inductivity of 4363 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:04:11,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:04:15,324 INFO L134 CoverageAnalysis]: Checked inductivity of 4363 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:04:15,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677998687] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:04:15,325 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:04:15,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 69, 69] total 138 [2022-03-20 13:04:15,325 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:04:15,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2060557471] [2022-03-20 13:04:15,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2060557471] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:04:15,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:04:15,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-03-20 13:04:15,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280937592] [2022-03-20 13:04:15,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:04:15,325 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-03-20 13:04:15,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:04:15,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-03-20 13:04:15,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9318, Invalid=9588, Unknown=0, NotChecked=0, Total=18906 [2022-03-20 13:04:15,327 INFO L87 Difference]: Start difference. First operand 153 states and 154 transitions. Second operand has 70 states, 70 states have (on average 2.057142857142857) internal successors, (144), 69 states have internal predecessors, (144), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:04:22,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:04:22,547 INFO L93 Difference]: Finished difference Result 431 states and 498 transitions. [2022-03-20 13:04:22,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-03-20 13:04:22,547 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.057142857142857) internal successors, (144), 69 states have internal predecessors, (144), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 152 [2022-03-20 13:04:22,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:04:22,548 INFO L225 Difference]: With dead ends: 431 [2022-03-20 13:04:22,548 INFO L226 Difference]: Without dead ends: 417 [2022-03-20 13:04:22,550 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2606 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=18498, Invalid=23322, Unknown=0, NotChecked=0, Total=41820 [2022-03-20 13:04:22,550 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 1195 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 495 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1195 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 495 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 13:04:22,550 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1195 Valid, 31 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [495 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 13:04:22,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2022-03-20 13:04:22,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 155. [2022-03-20 13:04:22,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 150 states have (on average 1.0133333333333334) internal successors, (152), 150 states have internal predecessors, (152), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:04:22,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 156 transitions. [2022-03-20 13:04:22,655 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 156 transitions. Word has length 152 [2022-03-20 13:04:22,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:04:22,655 INFO L478 AbstractCegarLoop]: Abstraction has 155 states and 156 transitions. [2022-03-20 13:04:22,655 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.057142857142857) internal successors, (144), 69 states have internal predecessors, (144), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:04:22,655 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 156 transitions. [2022-03-20 13:04:22,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-03-20 13:04:22,656 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:04:22,656 INFO L499 BasicCegarLoop]: trace histogram [67, 67, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:04:22,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-03-20 13:04:22,856 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-03-20 13:04:22,856 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:04:22,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:04:22,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1196716651, now seen corresponding path program 135 times [2022-03-20 13:04:22,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:04:22,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2089017462] [2022-03-20 13:04:22,857 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:04:22,858 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:04:22,858 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:04:22,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1196716651, now seen corresponding path program 136 times [2022-03-20 13:04:22,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:04:22,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382506161] [2022-03-20 13:04:22,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:04:22,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:04:22,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:04:24,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:04:24,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:04:24,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4496 backedges. 0 proven. 4489 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:04:24,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:04:24,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382506161] [2022-03-20 13:04:24,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382506161] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:04:24,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347086450] [2022-03-20 13:04:24,200 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:04:24,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:04:24,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:04:24,201 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:04:24,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-20 13:04:24,636 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:04:24,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:04:24,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 686 conjuncts, 69 conjunts are in the unsatisfiable core [2022-03-20 13:04:24,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:04:24,831 INFO L134 CoverageAnalysis]: Checked inductivity of 4496 backedges. 0 proven. 4489 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:04:24,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:04:28,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4496 backedges. 0 proven. 4489 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:04:28,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347086450] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:04:28,752 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:04:28,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 70, 70] total 140 [2022-03-20 13:04:28,752 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:04:28,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2089017462] [2022-03-20 13:04:28,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2089017462] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:04:28,753 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:04:28,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-03-20 13:04:28,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052639355] [2022-03-20 13:04:28,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:04:28,753 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-03-20 13:04:28,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:04:28,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-03-20 13:04:28,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9593, Invalid=9867, Unknown=0, NotChecked=0, Total=19460 [2022-03-20 13:04:28,756 INFO L87 Difference]: Start difference. First operand 155 states and 156 transitions. Second operand has 71 states, 71 states have (on average 2.056338028169014) internal successors, (146), 70 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:04:36,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:04:36,350 INFO L93 Difference]: Finished difference Result 437 states and 505 transitions. [2022-03-20 13:04:36,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-20 13:04:36,350 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.056338028169014) internal successors, (146), 70 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 154 [2022-03-20 13:04:36,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:04:36,351 INFO L225 Difference]: With dead ends: 437 [2022-03-20 13:04:36,351 INFO L226 Difference]: Without dead ends: 423 [2022-03-20 13:04:36,353 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2679 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=19046, Invalid=24010, Unknown=0, NotChecked=0, Total=43056 [2022-03-20 13:04:36,353 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 1214 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 497 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1214 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 497 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 13:04:36,353 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1214 Valid, 36 Invalid, 930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [497 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 13:04:36,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2022-03-20 13:04:36,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 157. [2022-03-20 13:04:36,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 152 states have (on average 1.013157894736842) internal successors, (154), 152 states have internal predecessors, (154), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:04:36,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2022-03-20 13:04:36,462 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 154 [2022-03-20 13:04:36,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:04:36,463 INFO L478 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2022-03-20 13:04:36,463 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.056338028169014) internal successors, (146), 70 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:04:36,463 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2022-03-20 13:04:36,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-03-20 13:04:36,463 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:04:36,463 INFO L499 BasicCegarLoop]: trace histogram [68, 68, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:04:36,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-03-20 13:04:36,673 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:04:36,674 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:04:36,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:04:36,674 INFO L85 PathProgramCache]: Analyzing trace with hash -755811529, now seen corresponding path program 137 times [2022-03-20 13:04:36,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:04:36,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [591426855] [2022-03-20 13:04:36,675 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:04:36,675 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:04:36,675 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:04:36,676 INFO L85 PathProgramCache]: Analyzing trace with hash -755811529, now seen corresponding path program 138 times [2022-03-20 13:04:36,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:04:36,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304789278] [2022-03-20 13:04:36,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:04:36,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:04:36,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:04:38,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:04:38,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:04:38,065 INFO L134 CoverageAnalysis]: Checked inductivity of 4631 backedges. 0 proven. 4624 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:04:38,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:04:38,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304789278] [2022-03-20 13:04:38,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304789278] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:04:38,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28121387] [2022-03-20 13:04:38,065 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:04:38,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:04:38,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:04:38,066 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:04:38,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-20 13:04:38,468 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 13:04:38,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:04:38,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 13:04:38,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:04:38,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4631 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4624 trivial. 0 not checked. [2022-03-20 13:04:38,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:04:38,906 INFO L134 CoverageAnalysis]: Checked inductivity of 4631 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4624 trivial. 0 not checked. [2022-03-20 13:04:38,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28121387] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:04:38,906 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:04:38,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 7, 7] total 78 [2022-03-20 13:04:38,906 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:04:38,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [591426855] [2022-03-20 13:04:38,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [591426855] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:04:38,907 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:04:38,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-03-20 13:04:38,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43904634] [2022-03-20 13:04:38,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:04:38,907 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-03-20 13:04:38,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:04:38,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-03-20 13:04:38,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2781, Invalid=3225, Unknown=0, NotChecked=0, Total=6006 [2022-03-20 13:04:38,908 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand has 72 states, 72 states have (on average 2.0555555555555554) internal successors, (148), 71 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:04:46,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:04:46,506 INFO L93 Difference]: Finished difference Result 443 states and 512 transitions. [2022-03-20 13:04:46,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-20 13:04:46,506 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.0555555555555554) internal successors, (148), 71 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 156 [2022-03-20 13:04:46,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:04:46,507 INFO L225 Difference]: With dead ends: 443 [2022-03-20 13:04:46,507 INFO L226 Difference]: Without dead ends: 429 [2022-03-20 13:04:46,508 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 307 SyntacticMatches, 1 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2831 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=7957, Invalid=13505, Unknown=0, NotChecked=0, Total=21462 [2022-03-20 13:04:46,508 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 1219 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 507 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1219 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 507 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 13:04:46,509 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1219 Valid, 46 Invalid, 956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [507 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 13:04:46,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2022-03-20 13:04:46,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 159. [2022-03-20 13:04:46,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 154 states have (on average 1.0129870129870129) internal successors, (156), 154 states have internal predecessors, (156), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:04:46,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 160 transitions. [2022-03-20 13:04:46,620 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 160 transitions. Word has length 156 [2022-03-20 13:04:46,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:04:46,620 INFO L478 AbstractCegarLoop]: Abstraction has 159 states and 160 transitions. [2022-03-20 13:04:46,620 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.0555555555555554) internal successors, (148), 71 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:04:46,620 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 160 transitions. [2022-03-20 13:04:46,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-03-20 13:04:46,621 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:04:46,621 INFO L499 BasicCegarLoop]: trace histogram [69, 69, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:04:46,639 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-03-20 13:04:46,822 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:04:46,822 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:04:46,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:04:46,823 INFO L85 PathProgramCache]: Analyzing trace with hash 2047215705, now seen corresponding path program 139 times [2022-03-20 13:04:46,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:04:46,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1149279084] [2022-03-20 13:04:46,824 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:04:46,824 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:04:46,824 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:04:46,824 INFO L85 PathProgramCache]: Analyzing trace with hash 2047215705, now seen corresponding path program 140 times [2022-03-20 13:04:46,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:04:46,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81576077] [2022-03-20 13:04:46,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:04:46,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:04:46,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:04:48,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:04:48,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:04:48,226 INFO L134 CoverageAnalysis]: Checked inductivity of 4768 backedges. 0 proven. 4761 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:04:48,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:04:48,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81576077] [2022-03-20 13:04:48,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81576077] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:04:48,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577195122] [2022-03-20 13:04:48,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:04:48,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:04:48,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:04:48,227 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:04:48,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-20 13:04:48,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:04:48,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:04:48,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 704 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-20 13:04:48,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:04:48,865 INFO L134 CoverageAnalysis]: Checked inductivity of 4768 backedges. 0 proven. 4761 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:04:48,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:04:52,938 INFO L134 CoverageAnalysis]: Checked inductivity of 4768 backedges. 0 proven. 4761 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:04:52,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577195122] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:04:52,938 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:04:52,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 72, 72] total 144 [2022-03-20 13:04:52,938 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:04:52,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1149279084] [2022-03-20 13:04:52,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1149279084] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:04:52,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:04:52,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-03-20 13:04:52,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168015155] [2022-03-20 13:04:52,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:04:52,939 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-03-20 13:04:52,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:04:52,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-03-20 13:04:52,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10155, Invalid=10437, Unknown=0, NotChecked=0, Total=20592 [2022-03-20 13:04:52,940 INFO L87 Difference]: Start difference. First operand 159 states and 160 transitions. Second operand has 73 states, 73 states have (on average 2.0547945205479454) internal successors, (150), 72 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:05:01,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:05:01,124 INFO L93 Difference]: Finished difference Result 449 states and 519 transitions. [2022-03-20 13:05:01,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-03-20 13:05:01,125 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.0547945205479454) internal successors, (150), 72 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 158 [2022-03-20 13:05:01,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:05:01,126 INFO L225 Difference]: With dead ends: 449 [2022-03-20 13:05:01,126 INFO L226 Difference]: Without dead ends: 435 [2022-03-20 13:05:01,129 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2828 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=20166, Invalid=25416, Unknown=0, NotChecked=0, Total=45582 [2022-03-20 13:05:01,129 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 1119 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 470 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1119 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 470 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 13:05:01,129 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1119 Valid, 46 Invalid, 924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [470 Valid, 454 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 13:05:01,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2022-03-20 13:05:01,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 161. [2022-03-20 13:05:01,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 156 states have (on average 1.0128205128205128) internal successors, (158), 156 states have internal predecessors, (158), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:05:01,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 162 transitions. [2022-03-20 13:05:01,256 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 162 transitions. Word has length 158 [2022-03-20 13:05:01,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:05:01,256 INFO L478 AbstractCegarLoop]: Abstraction has 161 states and 162 transitions. [2022-03-20 13:05:01,256 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.0547945205479454) internal successors, (150), 72 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:05:01,256 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 162 transitions. [2022-03-20 13:05:01,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-03-20 13:05:01,257 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:05:01,257 INFO L499 BasicCegarLoop]: trace histogram [70, 70, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:05:01,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-03-20 13:05:01,466 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:05:01,466 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:05:01,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:05:01,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1483074309, now seen corresponding path program 141 times [2022-03-20 13:05:01,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:05:01,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [568637322] [2022-03-20 13:05:01,468 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:05:01,468 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:05:01,468 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:05:01,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1483074309, now seen corresponding path program 142 times [2022-03-20 13:05:01,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:05:01,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176770382] [2022-03-20 13:05:01,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:05:01,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:05:01,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:05:02,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:05:02,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:05:02,928 INFO L134 CoverageAnalysis]: Checked inductivity of 4907 backedges. 0 proven. 4900 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:05:02,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:05:02,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176770382] [2022-03-20 13:05:02,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176770382] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:05:02,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661781370] [2022-03-20 13:05:02,928 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:05:02,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:05:02,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:05:02,929 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:05:02,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-20 13:05:03,382 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:05:03,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:05:03,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 713 conjuncts, 72 conjunts are in the unsatisfiable core [2022-03-20 13:05:03,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:05:03,587 INFO L134 CoverageAnalysis]: Checked inductivity of 4907 backedges. 0 proven. 4900 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:05:03,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:05:07,822 INFO L134 CoverageAnalysis]: Checked inductivity of 4907 backedges. 0 proven. 4900 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:05:07,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661781370] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:05:07,822 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:05:07,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 73, 73] total 146 [2022-03-20 13:05:07,822 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:05:07,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [568637322] [2022-03-20 13:05:07,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [568637322] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:05:07,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:05:07,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-03-20 13:05:07,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175963612] [2022-03-20 13:05:07,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:05:07,823 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-03-20 13:05:07,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:05:07,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-03-20 13:05:07,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10442, Invalid=10728, Unknown=0, NotChecked=0, Total=21170 [2022-03-20 13:05:07,824 INFO L87 Difference]: Start difference. First operand 161 states and 162 transitions. Second operand has 74 states, 74 states have (on average 2.054054054054054) internal successors, (152), 73 states have internal predecessors, (152), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:05:16,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:05:16,305 INFO L93 Difference]: Finished difference Result 455 states and 526 transitions. [2022-03-20 13:05:16,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-20 13:05:16,305 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.054054054054054) internal successors, (152), 73 states have internal predecessors, (152), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 160 [2022-03-20 13:05:16,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:05:16,307 INFO L225 Difference]: With dead ends: 455 [2022-03-20 13:05:16,307 INFO L226 Difference]: Without dead ends: 441 [2022-03-20 13:05:16,308 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2904 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=20738, Invalid=26134, Unknown=0, NotChecked=0, Total=46872 [2022-03-20 13:05:16,309 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 1189 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 493 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1189 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 493 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 13:05:16,309 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1189 Valid, 41 Invalid, 948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [493 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 13:05:16,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2022-03-20 13:05:16,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 163. [2022-03-20 13:05:16,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 158 states have (on average 1.0126582278481013) internal successors, (160), 158 states have internal predecessors, (160), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:05:16,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 164 transitions. [2022-03-20 13:05:16,431 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 164 transitions. Word has length 160 [2022-03-20 13:05:16,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:05:16,431 INFO L478 AbstractCegarLoop]: Abstraction has 163 states and 164 transitions. [2022-03-20 13:05:16,431 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.054054054054054) internal successors, (152), 73 states have internal predecessors, (152), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:05:16,431 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 164 transitions. [2022-03-20 13:05:16,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-03-20 13:05:16,431 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:05:16,432 INFO L499 BasicCegarLoop]: trace histogram [71, 71, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:05:16,451 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-03-20 13:05:16,635 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2022-03-20 13:05:16,636 INFO L403 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:05:16,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:05:16,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1067613923, now seen corresponding path program 143 times [2022-03-20 13:05:16,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:05:16,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [248129221] [2022-03-20 13:05:16,637 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:05:16,637 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:05:16,637 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:05:16,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1067613923, now seen corresponding path program 144 times [2022-03-20 13:05:16,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:05:16,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123818723] [2022-03-20 13:05:16,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:05:16,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:05:16,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:05:18,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:05:18,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:05:18,117 INFO L134 CoverageAnalysis]: Checked inductivity of 5048 backedges. 0 proven. 5041 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:05:18,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:05:18,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123818723] [2022-03-20 13:05:18,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123818723] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:05:18,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373006163] [2022-03-20 13:05:18,118 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:05:18,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:05:18,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:05:18,119 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:05:18,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-20 13:05:18,535 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 13:05:18,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:05:18,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 13:05:18,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:05:18,740 INFO L134 CoverageAnalysis]: Checked inductivity of 5048 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5041 trivial. 0 not checked. [2022-03-20 13:05:18,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:05:18,999 INFO L134 CoverageAnalysis]: Checked inductivity of 5048 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5041 trivial. 0 not checked. [2022-03-20 13:05:18,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373006163] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:05:18,999 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:05:18,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 7, 7] total 81 [2022-03-20 13:05:18,999 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:05:19,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [248129221] [2022-03-20 13:05:19,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [248129221] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:05:19,000 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:05:19,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-03-20 13:05:19,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583149510] [2022-03-20 13:05:19,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:05:19,000 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-03-20 13:05:19,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:05:19,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-03-20 13:05:19,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3009, Invalid=3471, Unknown=0, NotChecked=0, Total=6480 [2022-03-20 13:05:19,001 INFO L87 Difference]: Start difference. First operand 163 states and 164 transitions. Second operand has 75 states, 75 states have (on average 2.0533333333333332) internal successors, (154), 74 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:05:27,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:05:27,547 INFO L93 Difference]: Finished difference Result 461 states and 533 transitions. [2022-03-20 13:05:27,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-20 13:05:27,547 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.0533333333333332) internal successors, (154), 74 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 162 [2022-03-20 13:05:27,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:05:27,548 INFO L225 Difference]: With dead ends: 461 [2022-03-20 13:05:27,548 INFO L226 Difference]: Without dead ends: 447 [2022-03-20 13:05:27,549 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 319 SyntacticMatches, 1 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3062 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=8626, Invalid=14630, Unknown=0, NotChecked=0, Total=23256 [2022-03-20 13:05:27,549 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 1222 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 510 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1222 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 510 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 13:05:27,549 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1222 Valid, 31 Invalid, 962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [510 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 13:05:27,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2022-03-20 13:05:27,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 165. [2022-03-20 13:05:27,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 160 states have (on average 1.0125) internal successors, (162), 160 states have internal predecessors, (162), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:05:27,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 166 transitions. [2022-03-20 13:05:27,673 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 166 transitions. Word has length 162 [2022-03-20 13:05:27,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:05:27,674 INFO L478 AbstractCegarLoop]: Abstraction has 165 states and 166 transitions. [2022-03-20 13:05:27,674 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.0533333333333332) internal successors, (154), 74 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:05:27,674 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 166 transitions. [2022-03-20 13:05:27,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-03-20 13:05:27,674 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:05:27,674 INFO L499 BasicCegarLoop]: trace histogram [72, 72, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:05:27,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-03-20 13:05:27,887 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:05:27,887 INFO L403 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:05:27,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:05:27,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1242141505, now seen corresponding path program 145 times [2022-03-20 13:05:27,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:05:27,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2136762319] [2022-03-20 13:05:27,889 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:05:27,889 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:05:27,889 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:05:27,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1242141505, now seen corresponding path program 146 times [2022-03-20 13:05:27,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:05:27,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191063974] [2022-03-20 13:05:27,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:05:27,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:05:27,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:05:29,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:05:29,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:05:29,411 INFO L134 CoverageAnalysis]: Checked inductivity of 5191 backedges. 0 proven. 5184 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:05:29,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:05:29,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191063974] [2022-03-20 13:05:29,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191063974] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:05:29,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774195229] [2022-03-20 13:05:29,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:05:29,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:05:29,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:05:29,413 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:05:29,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-03-20 13:05:29,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:05:29,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:05:29,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 731 conjuncts, 74 conjunts are in the unsatisfiable core [2022-03-20 13:05:29,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:05:30,107 INFO L134 CoverageAnalysis]: Checked inductivity of 5191 backedges. 0 proven. 5184 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:05:30,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:05:34,484 INFO L134 CoverageAnalysis]: Checked inductivity of 5191 backedges. 0 proven. 5184 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:05:34,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774195229] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:05:34,484 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:05:34,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 75, 75] total 150 [2022-03-20 13:05:34,484 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:05:34,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2136762319] [2022-03-20 13:05:34,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2136762319] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:05:34,484 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:05:34,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-03-20 13:05:34,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467584553] [2022-03-20 13:05:34,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:05:34,485 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-03-20 13:05:34,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:05:34,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-03-20 13:05:34,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11028, Invalid=11322, Unknown=0, NotChecked=0, Total=22350 [2022-03-20 13:05:34,488 INFO L87 Difference]: Start difference. First operand 165 states and 166 transitions. Second operand has 76 states, 76 states have (on average 2.0526315789473686) internal successors, (156), 75 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:05:43,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:05:43,745 INFO L93 Difference]: Finished difference Result 467 states and 540 transitions. [2022-03-20 13:05:43,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-03-20 13:05:43,745 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.0526315789473686) internal successors, (156), 75 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 164 [2022-03-20 13:05:43,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:05:43,746 INFO L225 Difference]: With dead ends: 467 [2022-03-20 13:05:43,746 INFO L226 Difference]: Without dead ends: 453 [2022-03-20 13:05:43,748 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3059 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=21906, Invalid=27600, Unknown=0, NotChecked=0, Total=49506 [2022-03-20 13:05:43,748 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 1006 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 434 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1006 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 434 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 13:05:43,748 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1006 Valid, 51 Invalid, 912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [434 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 13:05:43,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2022-03-20 13:05:43,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 167. [2022-03-20 13:05:43,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 162 states have (on average 1.0123456790123457) internal successors, (164), 162 states have internal predecessors, (164), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:05:43,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 168 transitions. [2022-03-20 13:05:43,875 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 168 transitions. Word has length 164 [2022-03-20 13:05:43,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:05:43,875 INFO L478 AbstractCegarLoop]: Abstraction has 167 states and 168 transitions. [2022-03-20 13:05:43,875 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.0526315789473686) internal successors, (156), 75 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:05:43,875 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 168 transitions. [2022-03-20 13:05:43,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-03-20 13:05:43,876 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:05:43,876 INFO L499 BasicCegarLoop]: trace histogram [73, 73, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:05:43,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-03-20 13:05:44,089 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:05:44,089 INFO L403 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:05:44,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:05:44,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1459423263, now seen corresponding path program 147 times [2022-03-20 13:05:44,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:05:44,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1868124365] [2022-03-20 13:05:44,091 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:05:44,091 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:05:44,091 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:05:44,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1459423263, now seen corresponding path program 148 times [2022-03-20 13:05:44,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:05:44,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101061395] [2022-03-20 13:05:44,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:05:44,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:05:44,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:05:45,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:05:45,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:05:45,646 INFO L134 CoverageAnalysis]: Checked inductivity of 5336 backedges. 0 proven. 5329 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:05:45,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:05:45,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101061395] [2022-03-20 13:05:45,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101061395] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:05:45,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876672086] [2022-03-20 13:05:45,646 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:05:45,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:05:45,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:05:45,647 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:05:45,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-03-20 13:05:46,133 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:05:46,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:05:46,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 740 conjuncts, 75 conjunts are in the unsatisfiable core [2022-03-20 13:05:46,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:05:46,346 INFO L134 CoverageAnalysis]: Checked inductivity of 5336 backedges. 0 proven. 5329 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:05:46,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:05:50,791 INFO L134 CoverageAnalysis]: Checked inductivity of 5336 backedges. 0 proven. 5329 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:05:50,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876672086] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:05:50,791 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:05:50,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 76, 76] total 152 [2022-03-20 13:05:50,792 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:05:50,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1868124365] [2022-03-20 13:05:50,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1868124365] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:05:50,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:05:50,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-03-20 13:05:50,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532874801] [2022-03-20 13:05:50,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:05:50,792 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-03-20 13:05:50,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:05:50,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-03-20 13:05:50,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11327, Invalid=11625, Unknown=0, NotChecked=0, Total=22952 [2022-03-20 13:05:50,812 INFO L87 Difference]: Start difference. First operand 167 states and 168 transitions. Second operand has 77 states, 77 states have (on average 2.051948051948052) internal successors, (158), 76 states have internal predecessors, (158), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:06:00,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:06:00,385 INFO L93 Difference]: Finished difference Result 473 states and 547 transitions. [2022-03-20 13:06:00,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-03-20 13:06:00,386 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.051948051948052) internal successors, (158), 76 states have internal predecessors, (158), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 166 [2022-03-20 13:06:00,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:06:00,387 INFO L225 Difference]: With dead ends: 473 [2022-03-20 13:06:00,387 INFO L226 Difference]: Without dead ends: 459 [2022-03-20 13:06:00,389 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3138 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=22502, Invalid=28348, Unknown=0, NotChecked=0, Total=50850 [2022-03-20 13:06:00,389 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 1100 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 471 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1100 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 471 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 13:06:00,389 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1100 Valid, 46 Invalid, 950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [471 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 13:06:00,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2022-03-20 13:06:00,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 169. [2022-03-20 13:06:00,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 164 states have (on average 1.0121951219512195) internal successors, (166), 164 states have internal predecessors, (166), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:06:00,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 170 transitions. [2022-03-20 13:06:00,519 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 170 transitions. Word has length 166 [2022-03-20 13:06:00,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:06:00,519 INFO L478 AbstractCegarLoop]: Abstraction has 169 states and 170 transitions. [2022-03-20 13:06:00,519 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.051948051948052) internal successors, (158), 76 states have internal predecessors, (158), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:06:00,519 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 170 transitions. [2022-03-20 13:06:00,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-03-20 13:06:00,520 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:06:00,520 INFO L499 BasicCegarLoop]: trace histogram [74, 74, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:06:00,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-03-20 13:06:00,721 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2022-03-20 13:06:00,721 INFO L403 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:06:00,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:06:00,721 INFO L85 PathProgramCache]: Analyzing trace with hash 186204803, now seen corresponding path program 149 times [2022-03-20 13:06:00,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:06:00,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [645989026] [2022-03-20 13:06:00,723 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:06:00,723 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:06:00,723 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:06:00,723 INFO L85 PathProgramCache]: Analyzing trace with hash 186204803, now seen corresponding path program 150 times [2022-03-20 13:06:00,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:06:00,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836799258] [2022-03-20 13:06:00,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:06:00,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:06:00,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:06:02,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:06:02,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:06:02,336 INFO L134 CoverageAnalysis]: Checked inductivity of 5483 backedges. 0 proven. 5476 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:06:02,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:06:02,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836799258] [2022-03-20 13:06:02,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836799258] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:06:02,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677740329] [2022-03-20 13:06:02,336 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:06:02,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:06:02,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:06:02,337 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:06:02,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-03-20 13:06:02,788 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 13:06:02,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:06:02,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 13:06:02,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:06:02,983 INFO L134 CoverageAnalysis]: Checked inductivity of 5483 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5476 trivial. 0 not checked. [2022-03-20 13:06:02,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:06:03,249 INFO L134 CoverageAnalysis]: Checked inductivity of 5483 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5476 trivial. 0 not checked. [2022-03-20 13:06:03,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677740329] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:06:03,249 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:06:03,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 7, 7] total 84 [2022-03-20 13:06:03,249 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:06:03,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [645989026] [2022-03-20 13:06:03,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [645989026] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:06:03,249 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:06:03,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-03-20 13:06:03,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574844298] [2022-03-20 13:06:03,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:06:03,250 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-03-20 13:06:03,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:06:03,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-03-20 13:06:03,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3246, Invalid=3726, Unknown=0, NotChecked=0, Total=6972 [2022-03-20 13:06:03,251 INFO L87 Difference]: Start difference. First operand 169 states and 170 transitions. Second operand has 78 states, 78 states have (on average 2.051282051282051) internal successors, (160), 77 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:06:12,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:06:12,968 INFO L93 Difference]: Finished difference Result 479 states and 554 transitions. [2022-03-20 13:06:12,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-20 13:06:12,969 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.051282051282051) internal successors, (160), 77 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 168 [2022-03-20 13:06:12,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:06:12,970 INFO L225 Difference]: With dead ends: 479 [2022-03-20 13:06:12,970 INFO L226 Difference]: Without dead ends: 465 [2022-03-20 13:06:12,971 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 331 SyntacticMatches, 1 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3302 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=9322, Invalid=15800, Unknown=0, NotChecked=0, Total=25122 [2022-03-20 13:06:12,971 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 1414 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 580 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1414 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1064 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 580 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 13:06:12,971 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1414 Valid, 46 Invalid, 1064 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [580 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 13:06:12,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2022-03-20 13:06:13,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 171. [2022-03-20 13:06:13,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.0120481927710843) internal successors, (168), 166 states have internal predecessors, (168), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:06:13,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 172 transitions. [2022-03-20 13:06:13,105 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 172 transitions. Word has length 168 [2022-03-20 13:06:13,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:06:13,105 INFO L478 AbstractCegarLoop]: Abstraction has 171 states and 172 transitions. [2022-03-20 13:06:13,106 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.051282051282051) internal successors, (160), 77 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:06:13,106 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 172 transitions. [2022-03-20 13:06:13,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-03-20 13:06:13,106 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:06:13,106 INFO L499 BasicCegarLoop]: trace histogram [75, 75, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:06:13,125 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-03-20 13:06:13,307 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-03-20 13:06:13,307 INFO L403 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:06:13,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:06:13,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1086811301, now seen corresponding path program 151 times [2022-03-20 13:06:13,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:06:13,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [815804982] [2022-03-20 13:06:13,308 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:06:13,308 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:06:13,308 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:06:13,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1086811301, now seen corresponding path program 152 times [2022-03-20 13:06:13,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:06:13,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185455015] [2022-03-20 13:06:13,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:06:13,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:06:13,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:06:14,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:06:14,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:06:14,963 INFO L134 CoverageAnalysis]: Checked inductivity of 5632 backedges. 0 proven. 5625 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:06:14,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:06:14,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185455015] [2022-03-20 13:06:14,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185455015] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:06:14,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988219016] [2022-03-20 13:06:14,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:06:14,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:06:14,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:06:14,964 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:06:14,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-03-20 13:06:15,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:06:15,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:06:15,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 758 conjuncts, 77 conjunts are in the unsatisfiable core [2022-03-20 13:06:15,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:06:15,702 INFO L134 CoverageAnalysis]: Checked inductivity of 5632 backedges. 0 proven. 5625 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:06:15,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:06:20,529 INFO L134 CoverageAnalysis]: Checked inductivity of 5632 backedges. 0 proven. 5625 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:06:20,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988219016] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:06:20,529 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:06:20,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 78, 78] total 156 [2022-03-20 13:06:20,529 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:06:20,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [815804982] [2022-03-20 13:06:20,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [815804982] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:06:20,529 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:06:20,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-03-20 13:06:20,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763966424] [2022-03-20 13:06:20,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:06:20,530 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-03-20 13:06:20,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:06:20,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-03-20 13:06:20,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11937, Invalid=12243, Unknown=0, NotChecked=0, Total=24180 [2022-03-20 13:06:20,533 INFO L87 Difference]: Start difference. First operand 171 states and 172 transitions. Second operand has 79 states, 79 states have (on average 2.050632911392405) internal successors, (162), 78 states have internal predecessors, (162), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:06:31,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:06:31,092 INFO L93 Difference]: Finished difference Result 485 states and 561 transitions. [2022-03-20 13:06:31,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-03-20 13:06:31,093 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.050632911392405) internal successors, (162), 78 states have internal predecessors, (162), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 170 [2022-03-20 13:06:31,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:06:31,094 INFO L225 Difference]: With dead ends: 485 [2022-03-20 13:06:31,094 INFO L226 Difference]: Without dead ends: 471 [2022-03-20 13:06:31,096 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3299 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=23718, Invalid=29874, Unknown=0, NotChecked=0, Total=53592 [2022-03-20 13:06:31,096 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 1398 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 575 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1398 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 1041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 575 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 13:06:31,096 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1398 Valid, 21 Invalid, 1041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [575 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 13:06:31,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2022-03-20 13:06:31,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 173. [2022-03-20 13:06:31,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 168 states have (on average 1.0119047619047619) internal successors, (170), 168 states have internal predecessors, (170), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:06:31,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 174 transitions. [2022-03-20 13:06:31,236 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 174 transitions. Word has length 170 [2022-03-20 13:06:31,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:06:31,237 INFO L478 AbstractCegarLoop]: Abstraction has 173 states and 174 transitions. [2022-03-20 13:06:31,237 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.050632911392405) internal successors, (162), 78 states have internal predecessors, (162), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:06:31,237 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 174 transitions. [2022-03-20 13:06:31,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-03-20 13:06:31,237 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:06:31,237 INFO L499 BasicCegarLoop]: trace histogram [76, 76, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:06:31,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-03-20 13:06:31,444 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:06:31,444 INFO L403 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:06:31,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:06:31,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1013737913, now seen corresponding path program 153 times [2022-03-20 13:06:31,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:06:31,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1038150000] [2022-03-20 13:06:31,446 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:06:31,446 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:06:31,446 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:06:31,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1013737913, now seen corresponding path program 154 times [2022-03-20 13:06:31,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:06:31,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862887427] [2022-03-20 13:06:31,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:06:31,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:06:31,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:06:33,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:06:33,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:06:33,199 INFO L134 CoverageAnalysis]: Checked inductivity of 5783 backedges. 0 proven. 5776 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:06:33,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:06:33,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862887427] [2022-03-20 13:06:33,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862887427] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:06:33,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020840283] [2022-03-20 13:06:33,199 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:06:33,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:06:33,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:06:33,200 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:06:33,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-03-20 13:06:33,745 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:06:33,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:06:33,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 767 conjuncts, 78 conjunts are in the unsatisfiable core [2022-03-20 13:06:33,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:06:33,958 INFO L134 CoverageAnalysis]: Checked inductivity of 5783 backedges. 0 proven. 5776 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:06:33,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:06:38,892 INFO L134 CoverageAnalysis]: Checked inductivity of 5783 backedges. 0 proven. 5776 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:06:38,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020840283] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:06:38,893 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:06:38,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 79, 79] total 158 [2022-03-20 13:06:38,893 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:06:38,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1038150000] [2022-03-20 13:06:38,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1038150000] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:06:38,893 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:06:38,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-03-20 13:06:38,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047871142] [2022-03-20 13:06:38,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:06:38,893 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-03-20 13:06:38,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:06:38,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-03-20 13:06:38,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12248, Invalid=12558, Unknown=0, NotChecked=0, Total=24806 [2022-03-20 13:06:38,897 INFO L87 Difference]: Start difference. First operand 173 states and 174 transitions. Second operand has 80 states, 80 states have (on average 2.05) internal successors, (164), 79 states have internal predecessors, (164), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:06:49,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:06:49,807 INFO L93 Difference]: Finished difference Result 491 states and 568 transitions. [2022-03-20 13:06:49,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-03-20 13:06:49,807 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.05) internal successors, (164), 79 states have internal predecessors, (164), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 172 [2022-03-20 13:06:49,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:06:49,808 INFO L225 Difference]: With dead ends: 491 [2022-03-20 13:06:49,808 INFO L226 Difference]: Without dead ends: 477 [2022-03-20 13:06:49,810 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3381 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=24338, Invalid=30652, Unknown=0, NotChecked=0, Total=54990 [2022-03-20 13:06:49,810 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 1165 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 496 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1165 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 496 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 13:06:49,810 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1165 Valid, 41 Invalid, 988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [496 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 13:06:49,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2022-03-20 13:06:49,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 175. [2022-03-20 13:06:49,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 170 states have (on average 1.011764705882353) internal successors, (172), 170 states have internal predecessors, (172), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:06:49,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 176 transitions. [2022-03-20 13:06:49,954 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 176 transitions. Word has length 172 [2022-03-20 13:06:49,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:06:49,954 INFO L478 AbstractCegarLoop]: Abstraction has 175 states and 176 transitions. [2022-03-20 13:06:49,954 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.05) internal successors, (164), 79 states have internal predecessors, (164), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:06:49,954 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 176 transitions. [2022-03-20 13:06:49,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-03-20 13:06:49,955 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:06:49,955 INFO L499 BasicCegarLoop]: trace histogram [77, 77, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:06:49,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-03-20 13:06:50,174 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:06:50,174 INFO L403 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:06:50,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:06:50,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1006903447, now seen corresponding path program 155 times [2022-03-20 13:06:50,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:06:50,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [45542022] [2022-03-20 13:06:50,176 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:06:50,176 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:06:50,176 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:06:50,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1006903447, now seen corresponding path program 156 times [2022-03-20 13:06:50,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:06:50,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010190429] [2022-03-20 13:06:50,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:06:50,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:06:50,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:06:51,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:06:51,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:06:51,947 INFO L134 CoverageAnalysis]: Checked inductivity of 5936 backedges. 0 proven. 5929 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:06:51,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:06:51,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010190429] [2022-03-20 13:06:51,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010190429] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:06:51,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980490610] [2022-03-20 13:06:51,947 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:06:51,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:06:51,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:06:51,948 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:06:51,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-03-20 13:06:52,455 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 13:06:52,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:06:52,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 13:06:52,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:06:52,657 INFO L134 CoverageAnalysis]: Checked inductivity of 5936 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5929 trivial. 0 not checked. [2022-03-20 13:06:52,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:06:52,932 INFO L134 CoverageAnalysis]: Checked inductivity of 5936 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5929 trivial. 0 not checked. [2022-03-20 13:06:52,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980490610] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:06:52,932 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:06:52,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 7, 7] total 87 [2022-03-20 13:06:52,932 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:06:52,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [45542022] [2022-03-20 13:06:52,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [45542022] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:06:52,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:06:52,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-03-20 13:06:52,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322363421] [2022-03-20 13:06:52,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:06:52,933 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-03-20 13:06:52,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:06:52,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-03-20 13:06:52,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3492, Invalid=3990, Unknown=0, NotChecked=0, Total=7482 [2022-03-20 13:06:52,935 INFO L87 Difference]: Start difference. First operand 175 states and 176 transitions. Second operand has 81 states, 81 states have (on average 2.049382716049383) internal successors, (166), 80 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:07:03,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:07:03,899 INFO L93 Difference]: Finished difference Result 497 states and 575 transitions. [2022-03-20 13:07:03,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-03-20 13:07:03,899 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.049382716049383) internal successors, (166), 80 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 174 [2022-03-20 13:07:03,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:07:03,901 INFO L225 Difference]: With dead ends: 497 [2022-03-20 13:07:03,901 INFO L226 Difference]: Without dead ends: 483 [2022-03-20 13:07:03,902 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 343 SyntacticMatches, 1 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3551 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=10045, Invalid=17015, Unknown=0, NotChecked=0, Total=27060 [2022-03-20 13:07:03,902 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 1071 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 463 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1071 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 463 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 13:07:03,902 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1071 Valid, 61 Invalid, 980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [463 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 13:07:03,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2022-03-20 13:07:04,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 177. [2022-03-20 13:07:04,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 172 states have (on average 1.0116279069767442) internal successors, (174), 172 states have internal predecessors, (174), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:07:04,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 178 transitions. [2022-03-20 13:07:04,050 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 178 transitions. Word has length 174 [2022-03-20 13:07:04,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:07:04,050 INFO L478 AbstractCegarLoop]: Abstraction has 177 states and 178 transitions. [2022-03-20 13:07:04,050 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.049382716049383) internal successors, (166), 80 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:07:04,050 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 178 transitions. [2022-03-20 13:07:04,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-03-20 13:07:04,051 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:07:04,051 INFO L499 BasicCegarLoop]: trace histogram [78, 78, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:07:04,069 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-03-20 13:07:04,258 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:07:04,259 INFO L403 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:07:04,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:07:04,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1266051083, now seen corresponding path program 157 times [2022-03-20 13:07:04,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:07:04,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1790694613] [2022-03-20 13:07:04,260 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:07:04,260 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:07:04,260 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:07:04,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1266051083, now seen corresponding path program 158 times [2022-03-20 13:07:04,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:07:04,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330410911] [2022-03-20 13:07:04,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:07:04,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:07:04,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:06,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:07:06,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:06,035 INFO L134 CoverageAnalysis]: Checked inductivity of 6091 backedges. 0 proven. 6084 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:07:06,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:07:06,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330410911] [2022-03-20 13:07:06,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330410911] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:07:06,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532590746] [2022-03-20 13:07:06,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:07:06,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:07:06,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:07:06,036 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:07:06,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-03-20 13:07:06,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:07:06,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:07:06,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 785 conjuncts, 80 conjunts are in the unsatisfiable core [2022-03-20 13:07:06,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:07:06,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6091 backedges. 0 proven. 6084 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:07:06,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:07:12,008 INFO L134 CoverageAnalysis]: Checked inductivity of 6091 backedges. 0 proven. 6084 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:07:12,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532590746] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:07:12,008 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:07:12,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 81, 81] total 162 [2022-03-20 13:07:12,008 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:07:12,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1790694613] [2022-03-20 13:07:12,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1790694613] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:07:12,008 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:07:12,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-03-20 13:07:12,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773991742] [2022-03-20 13:07:12,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:07:12,009 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-03-20 13:07:12,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:07:12,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-03-20 13:07:12,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12882, Invalid=13200, Unknown=0, NotChecked=0, Total=26082 [2022-03-20 13:07:12,012 INFO L87 Difference]: Start difference. First operand 177 states and 178 transitions. Second operand has 82 states, 82 states have (on average 2.048780487804878) internal successors, (168), 81 states have internal predecessors, (168), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:07:24,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:07:24,075 INFO L93 Difference]: Finished difference Result 503 states and 582 transitions. [2022-03-20 13:07:24,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-03-20 13:07:24,075 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.048780487804878) internal successors, (168), 81 states have internal predecessors, (168), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 176 [2022-03-20 13:07:24,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:07:24,076 INFO L225 Difference]: With dead ends: 503 [2022-03-20 13:07:24,076 INFO L226 Difference]: Without dead ends: 489 [2022-03-20 13:07:24,078 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3548 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=25602, Invalid=32238, Unknown=0, NotChecked=0, Total=57840 [2022-03-20 13:07:24,079 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 1230 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 519 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1230 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 519 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 13:07:24,079 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1230 Valid, 46 Invalid, 1027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [519 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 13:07:24,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2022-03-20 13:07:24,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 179. [2022-03-20 13:07:24,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 174 states have (on average 1.0114942528735633) internal successors, (176), 174 states have internal predecessors, (176), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:07:24,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 180 transitions. [2022-03-20 13:07:24,236 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 180 transitions. Word has length 176 [2022-03-20 13:07:24,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:07:24,236 INFO L478 AbstractCegarLoop]: Abstraction has 179 states and 180 transitions. [2022-03-20 13:07:24,236 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.048780487804878) internal successors, (168), 81 states have internal predecessors, (168), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:07:24,236 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 180 transitions. [2022-03-20 13:07:24,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-03-20 13:07:24,236 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:07:24,237 INFO L499 BasicCegarLoop]: trace histogram [79, 79, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:07:24,256 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-03-20 13:07:24,437 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:07:24,437 INFO L403 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:07:24,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:07:24,437 INFO L85 PathProgramCache]: Analyzing trace with hash -562999251, now seen corresponding path program 159 times [2022-03-20 13:07:24,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:07:24,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1822190028] [2022-03-20 13:07:24,438 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:07:24,438 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:07:24,438 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:07:24,439 INFO L85 PathProgramCache]: Analyzing trace with hash -562999251, now seen corresponding path program 160 times [2022-03-20 13:07:24,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:07:24,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586831032] [2022-03-20 13:07:24,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:07:24,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:07:24,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:26,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:07:26,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:26,260 INFO L134 CoverageAnalysis]: Checked inductivity of 6248 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:07:26,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:07:26,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586831032] [2022-03-20 13:07:26,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586831032] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:07:26,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866531973] [2022-03-20 13:07:26,260 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:07:26,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:07:26,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:07:26,261 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:07:26,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-03-20 13:07:26,820 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:07:26,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:07:26,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 794 conjuncts, 81 conjunts are in the unsatisfiable core [2022-03-20 13:07:26,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:07:27,050 INFO L134 CoverageAnalysis]: Checked inductivity of 6248 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:07:27,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:07:32,331 INFO L134 CoverageAnalysis]: Checked inductivity of 6248 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:07:32,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866531973] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:07:32,331 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:07:32,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 82, 82] total 164 [2022-03-20 13:07:32,331 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:07:32,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1822190028] [2022-03-20 13:07:32,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1822190028] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:07:32,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:07:32,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-03-20 13:07:32,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865773062] [2022-03-20 13:07:32,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:07:32,332 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-03-20 13:07:32,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:07:32,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-03-20 13:07:32,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13205, Invalid=13527, Unknown=0, NotChecked=0, Total=26732 [2022-03-20 13:07:32,334 INFO L87 Difference]: Start difference. First operand 179 states and 180 transitions. Second operand has 83 states, 83 states have (on average 2.0481927710843375) internal successors, (170), 82 states have internal predecessors, (170), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:07:44,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:07:44,587 INFO L93 Difference]: Finished difference Result 509 states and 589 transitions. [2022-03-20 13:07:44,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-03-20 13:07:44,587 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.0481927710843375) internal successors, (170), 82 states have internal predecessors, (170), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 178 [2022-03-20 13:07:44,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:07:44,588 INFO L225 Difference]: With dead ends: 509 [2022-03-20 13:07:44,588 INFO L226 Difference]: Without dead ends: 495 [2022-03-20 13:07:44,590 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 277 SyntacticMatches, 0 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3633 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=26246, Invalid=33046, Unknown=0, NotChecked=0, Total=59292 [2022-03-20 13:07:44,591 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 1273 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 536 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1273 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 1046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 536 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 13:07:44,591 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1273 Valid, 41 Invalid, 1046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [536 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 13:07:44,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2022-03-20 13:07:44,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 181. [2022-03-20 13:07:44,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 176 states have (on average 1.0113636363636365) internal successors, (178), 176 states have internal predecessors, (178), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:07:44,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 182 transitions. [2022-03-20 13:07:44,748 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 182 transitions. Word has length 178 [2022-03-20 13:07:44,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:07:44,749 INFO L478 AbstractCegarLoop]: Abstraction has 181 states and 182 transitions. [2022-03-20 13:07:44,749 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.0481927710843375) internal successors, (170), 82 states have internal predecessors, (170), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:07:44,749 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 182 transitions. [2022-03-20 13:07:44,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-03-20 13:07:44,749 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:07:44,749 INFO L499 BasicCegarLoop]: trace histogram [80, 80, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:07:44,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-03-20 13:07:44,950 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:07:44,950 INFO L403 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:07:44,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:07:44,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1638746161, now seen corresponding path program 161 times [2022-03-20 13:07:44,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:07:44,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [563861299] [2022-03-20 13:07:44,951 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:07:44,951 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:07:44,951 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:07:44,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1638746161, now seen corresponding path program 162 times [2022-03-20 13:07:44,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:07:44,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933051116] [2022-03-20 13:07:44,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:07:44,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:07:44,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:46,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:07:46,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:46,804 INFO L134 CoverageAnalysis]: Checked inductivity of 6407 backedges. 0 proven. 6400 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:07:46,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:07:46,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933051116] [2022-03-20 13:07:46,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933051116] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:07:46,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677118681] [2022-03-20 13:07:46,805 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:07:46,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:07:46,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:07:46,806 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:07:46,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-03-20 13:07:47,324 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 13:07:47,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:07:47,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 13:07:47,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:07:47,532 INFO L134 CoverageAnalysis]: Checked inductivity of 6407 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6400 trivial. 0 not checked. [2022-03-20 13:07:47,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:07:47,818 INFO L134 CoverageAnalysis]: Checked inductivity of 6407 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6400 trivial. 0 not checked. [2022-03-20 13:07:47,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677118681] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:07:47,819 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:07:47,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 7, 7] total 90 [2022-03-20 13:07:47,819 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:07:47,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [563861299] [2022-03-20 13:07:47,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [563861299] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:07:47,819 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:07:47,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-03-20 13:07:47,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776671861] [2022-03-20 13:07:47,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:07:47,819 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-03-20 13:07:47,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:07:47,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-03-20 13:07:47,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3747, Invalid=4263, Unknown=0, NotChecked=0, Total=8010 [2022-03-20 13:07:47,821 INFO L87 Difference]: Start difference. First operand 181 states and 182 transitions. Second operand has 84 states, 84 states have (on average 2.0476190476190474) internal successors, (172), 83 states have internal predecessors, (172), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:08:00,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:08:00,101 INFO L93 Difference]: Finished difference Result 515 states and 596 transitions. [2022-03-20 13:08:00,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-03-20 13:08:00,101 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.0476190476190474) internal successors, (172), 83 states have internal predecessors, (172), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 180 [2022-03-20 13:08:00,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:08:00,102 INFO L225 Difference]: With dead ends: 515 [2022-03-20 13:08:00,102 INFO L226 Difference]: Without dead ends: 501 [2022-03-20 13:08:00,104 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 355 SyntacticMatches, 1 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3809 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=10795, Invalid=18275, Unknown=0, NotChecked=0, Total=29070 [2022-03-20 13:08:00,104 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 1432 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 590 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1432 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 1101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 590 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 13:08:00,104 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1432 Valid, 36 Invalid, 1101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [590 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 13:08:00,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2022-03-20 13:08:00,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 183. [2022-03-20 13:08:00,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 178 states have (on average 1.0112359550561798) internal successors, (180), 178 states have internal predecessors, (180), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:08:00,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 184 transitions. [2022-03-20 13:08:00,268 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 184 transitions. Word has length 180 [2022-03-20 13:08:00,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:08:00,268 INFO L478 AbstractCegarLoop]: Abstraction has 183 states and 184 transitions. [2022-03-20 13:08:00,268 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.0476190476190474) internal successors, (172), 83 states have internal predecessors, (172), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:08:00,268 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 184 transitions. [2022-03-20 13:08:00,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-03-20 13:08:00,268 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:08:00,269 INFO L499 BasicCegarLoop]: trace histogram [81, 81, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:08:00,288 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-03-20 13:08:00,469 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2022-03-20 13:08:00,469 INFO L403 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:08:00,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:08:00,469 INFO L85 PathProgramCache]: Analyzing trace with hash -344408335, now seen corresponding path program 163 times [2022-03-20 13:08:00,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:08:00,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1486918573] [2022-03-20 13:08:00,470 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:08:00,470 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:08:00,470 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:08:00,470 INFO L85 PathProgramCache]: Analyzing trace with hash -344408335, now seen corresponding path program 164 times [2022-03-20 13:08:00,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:08:00,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6396344] [2022-03-20 13:08:00,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:08:00,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:08:00,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:08:02,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:08:02,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:08:02,371 INFO L134 CoverageAnalysis]: Checked inductivity of 6568 backedges. 0 proven. 6561 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:08:02,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:08:02,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6396344] [2022-03-20 13:08:02,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6396344] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:08:02,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765357768] [2022-03-20 13:08:02,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:08:02,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:08:02,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:08:02,372 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:08:02,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-03-20 13:08:02,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:08:02,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:08:02,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 812 conjuncts, 83 conjunts are in the unsatisfiable core [2022-03-20 13:08:02,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:08:03,186 INFO L134 CoverageAnalysis]: Checked inductivity of 6568 backedges. 0 proven. 6561 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:08:03,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:08:08,634 INFO L134 CoverageAnalysis]: Checked inductivity of 6568 backedges. 0 proven. 6561 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:08:08,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765357768] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:08:08,635 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:08:08,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 84, 84] total 168 [2022-03-20 13:08:08,635 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:08:08,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1486918573] [2022-03-20 13:08:08,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1486918573] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:08:08,635 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:08:08,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-03-20 13:08:08,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509102347] [2022-03-20 13:08:08,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:08:08,635 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-03-20 13:08:08,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:08:08,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-03-20 13:08:08,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13863, Invalid=14193, Unknown=0, NotChecked=0, Total=28056 [2022-03-20 13:08:08,637 INFO L87 Difference]: Start difference. First operand 183 states and 184 transitions. Second operand has 85 states, 85 states have (on average 2.0470588235294116) internal successors, (174), 84 states have internal predecessors, (174), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:08:21,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:08:21,946 INFO L93 Difference]: Finished difference Result 521 states and 603 transitions. [2022-03-20 13:08:21,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-03-20 13:08:21,946 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.0470588235294116) internal successors, (174), 84 states have internal predecessors, (174), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 182 [2022-03-20 13:08:21,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:08:21,948 INFO L225 Difference]: With dead ends: 521 [2022-03-20 13:08:21,948 INFO L226 Difference]: Without dead ends: 507 [2022-03-20 13:08:21,950 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 531 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 248 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3806 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=27558, Invalid=34692, Unknown=0, NotChecked=0, Total=62250 [2022-03-20 13:08:21,950 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 1373 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 570 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1373 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 570 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 13:08:21,950 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1373 Valid, 46 Invalid, 1097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [570 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 13:08:21,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2022-03-20 13:08:22,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 185. [2022-03-20 13:08:22,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 180 states have (on average 1.011111111111111) internal successors, (182), 180 states have internal predecessors, (182), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:08:22,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 186 transitions. [2022-03-20 13:08:22,118 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 186 transitions. Word has length 182 [2022-03-20 13:08:22,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:08:22,118 INFO L478 AbstractCegarLoop]: Abstraction has 185 states and 186 transitions. [2022-03-20 13:08:22,119 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.0470588235294116) internal successors, (174), 84 states have internal predecessors, (174), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:08:22,119 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 186 transitions. [2022-03-20 13:08:22,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-03-20 13:08:22,119 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:08:22,119 INFO L499 BasicCegarLoop]: trace histogram [82, 82, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:08:22,139 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2022-03-20 13:08:22,323 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:08:22,323 INFO L403 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:08:22,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:08:22,324 INFO L85 PathProgramCache]: Analyzing trace with hash -2026273389, now seen corresponding path program 165 times [2022-03-20 13:08:22,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:08:22,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1428181369] [2022-03-20 13:08:22,325 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:08:22,325 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:08:22,325 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:08:22,325 INFO L85 PathProgramCache]: Analyzing trace with hash -2026273389, now seen corresponding path program 166 times [2022-03-20 13:08:22,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:08:22,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760740800] [2022-03-20 13:08:22,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:08:22,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:08:22,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:08:24,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:08:24,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:08:24,252 INFO L134 CoverageAnalysis]: Checked inductivity of 6731 backedges. 0 proven. 6724 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:08:24,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:08:24,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760740800] [2022-03-20 13:08:24,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760740800] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:08:24,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946696344] [2022-03-20 13:08:24,252 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:08:24,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:08:24,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:08:24,253 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:08:24,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-03-20 13:08:24,860 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:08:24,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:08:24,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 84 conjunts are in the unsatisfiable core [2022-03-20 13:08:24,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:08:25,094 INFO L134 CoverageAnalysis]: Checked inductivity of 6731 backedges. 0 proven. 6724 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:08:25,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:08:30,695 INFO L134 CoverageAnalysis]: Checked inductivity of 6731 backedges. 0 proven. 6724 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:08:30,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946696344] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:08:30,696 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:08:30,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 85, 85] total 170 [2022-03-20 13:08:30,696 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:08:30,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1428181369] [2022-03-20 13:08:30,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1428181369] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:08:30,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:08:30,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-03-20 13:08:30,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155600009] [2022-03-20 13:08:30,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:08:30,697 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-03-20 13:08:30,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:08:30,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-03-20 13:08:30,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14198, Invalid=14532, Unknown=0, NotChecked=0, Total=28730 [2022-03-20 13:08:30,701 INFO L87 Difference]: Start difference. First operand 185 states and 186 transitions. Second operand has 86 states, 86 states have (on average 2.046511627906977) internal successors, (176), 85 states have internal predecessors, (176), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:08:44,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:08:44,557 INFO L93 Difference]: Finished difference Result 527 states and 610 transitions. [2022-03-20 13:08:44,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-03-20 13:08:44,557 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.046511627906977) internal successors, (176), 85 states have internal predecessors, (176), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 184 [2022-03-20 13:08:44,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:08:44,558 INFO L225 Difference]: With dead ends: 527 [2022-03-20 13:08:44,558 INFO L226 Difference]: Without dead ends: 513 [2022-03-20 13:08:44,561 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 537 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3894 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=28226, Invalid=35530, Unknown=0, NotChecked=0, Total=63756 [2022-03-20 13:08:44,561 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 1412 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 591 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1412 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 591 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 13:08:44,562 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1412 Valid, 46 Invalid, 1124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [591 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 13:08:44,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2022-03-20 13:08:44,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 187. [2022-03-20 13:08:44,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 182 states have (on average 1.010989010989011) internal successors, (184), 182 states have internal predecessors, (184), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:08:44,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 188 transitions. [2022-03-20 13:08:44,739 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 188 transitions. Word has length 184 [2022-03-20 13:08:44,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:08:44,739 INFO L478 AbstractCegarLoop]: Abstraction has 187 states and 188 transitions. [2022-03-20 13:08:44,740 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.046511627906977) internal successors, (176), 85 states have internal predecessors, (176), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:08:44,740 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 188 transitions. [2022-03-20 13:08:44,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-03-20 13:08:44,740 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:08:44,740 INFO L499 BasicCegarLoop]: trace histogram [83, 83, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:08:44,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-03-20 13:08:44,948 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:08:44,948 INFO L403 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:08:44,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:08:44,948 INFO L85 PathProgramCache]: Analyzing trace with hash 904080309, now seen corresponding path program 167 times [2022-03-20 13:08:44,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:08:44,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1346444990] [2022-03-20 13:08:44,949 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:08:44,949 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:08:44,949 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:08:44,950 INFO L85 PathProgramCache]: Analyzing trace with hash 904080309, now seen corresponding path program 168 times [2022-03-20 13:08:44,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:08:44,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218079318] [2022-03-20 13:08:44,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:08:44,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:08:44,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:08:46,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:08:47,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:08:47,001 INFO L134 CoverageAnalysis]: Checked inductivity of 6896 backedges. 0 proven. 6889 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:08:47,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:08:47,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218079318] [2022-03-20 13:08:47,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218079318] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:08:47,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242442482] [2022-03-20 13:08:47,002 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:08:47,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:08:47,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:08:47,003 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:08:47,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-03-20 13:08:47,573 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 13:08:47,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:08:47,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 13:08:47,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:08:47,808 INFO L134 CoverageAnalysis]: Checked inductivity of 6896 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6889 trivial. 0 not checked. [2022-03-20 13:08:47,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:08:48,113 INFO L134 CoverageAnalysis]: Checked inductivity of 6896 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6889 trivial. 0 not checked. [2022-03-20 13:08:48,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242442482] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:08:48,113 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:08:48,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 7, 7] total 93 [2022-03-20 13:08:48,114 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:08:48,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1346444990] [2022-03-20 13:08:48,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1346444990] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:08:48,114 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:08:48,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-03-20 13:08:48,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701273852] [2022-03-20 13:08:48,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:08:48,114 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-03-20 13:08:48,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:08:48,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-03-20 13:08:48,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4011, Invalid=4545, Unknown=0, NotChecked=0, Total=8556 [2022-03-20 13:08:48,116 INFO L87 Difference]: Start difference. First operand 187 states and 188 transitions. Second operand has 87 states, 87 states have (on average 2.045977011494253) internal successors, (178), 86 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:09:02,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:09:02,394 INFO L93 Difference]: Finished difference Result 533 states and 617 transitions. [2022-03-20 13:09:02,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-03-20 13:09:02,394 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.045977011494253) internal successors, (178), 86 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 186 [2022-03-20 13:09:02,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:09:02,395 INFO L225 Difference]: With dead ends: 533 [2022-03-20 13:09:02,395 INFO L226 Difference]: Without dead ends: 519 [2022-03-20 13:09:02,397 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 543 GetRequests, 367 SyntacticMatches, 1 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4076 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=11572, Invalid=19580, Unknown=0, NotChecked=0, Total=31152 [2022-03-20 13:09:02,397 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 1390 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 579 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1390 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 1102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 579 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 13:09:02,397 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1390 Valid, 31 Invalid, 1102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [579 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 13:09:02,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2022-03-20 13:09:02,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 189. [2022-03-20 13:09:02,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 184 states have (on average 1.0108695652173914) internal successors, (186), 184 states have internal predecessors, (186), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:09:02,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 190 transitions. [2022-03-20 13:09:02,575 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 190 transitions. Word has length 186 [2022-03-20 13:09:02,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:09:02,575 INFO L478 AbstractCegarLoop]: Abstraction has 189 states and 190 transitions. [2022-03-20 13:09:02,575 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 2.045977011494253) internal successors, (178), 86 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:09:02,575 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 190 transitions. [2022-03-20 13:09:02,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-03-20 13:09:02,576 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:09:02,576 INFO L499 BasicCegarLoop]: trace histogram [84, 84, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:09:02,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-03-20 13:09:02,776 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:09:02,776 INFO L403 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:09:02,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:09:02,777 INFO L85 PathProgramCache]: Analyzing trace with hash -524562089, now seen corresponding path program 169 times [2022-03-20 13:09:02,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:09:02,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1557253120] [2022-03-20 13:09:02,778 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:09:02,778 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:09:02,778 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:09:02,778 INFO L85 PathProgramCache]: Analyzing trace with hash -524562089, now seen corresponding path program 170 times [2022-03-20 13:09:02,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:09:02,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811075966] [2022-03-20 13:09:02,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:09:02,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:09:02,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:09:04,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:09:04,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:09:04,844 INFO L134 CoverageAnalysis]: Checked inductivity of 7063 backedges. 0 proven. 7056 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:09:04,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:09:04,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811075966] [2022-03-20 13:09:04,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811075966] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:09:04,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137811888] [2022-03-20 13:09:04,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:09:04,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:09:04,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:09:04,846 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:09:04,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-03-20 13:09:05,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:09:05,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:09:05,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 839 conjuncts, 86 conjunts are in the unsatisfiable core [2022-03-20 13:09:05,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:09:05,709 INFO L134 CoverageAnalysis]: Checked inductivity of 7063 backedges. 0 proven. 7056 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:09:05,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:09:11,734 INFO L134 CoverageAnalysis]: Checked inductivity of 7063 backedges. 0 proven. 7056 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:09:11,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137811888] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:09:11,734 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:09:11,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 87, 87] total 174 [2022-03-20 13:09:11,734 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:09:11,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1557253120] [2022-03-20 13:09:11,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1557253120] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:09:11,735 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:09:11,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-03-20 13:09:11,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689258477] [2022-03-20 13:09:11,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:09:11,735 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-03-20 13:09:11,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:09:11,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-03-20 13:09:11,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14880, Invalid=15222, Unknown=0, NotChecked=0, Total=30102 [2022-03-20 13:09:11,737 INFO L87 Difference]: Start difference. First operand 189 states and 190 transitions. Second operand has 88 states, 88 states have (on average 2.0454545454545454) internal successors, (180), 87 states have internal predecessors, (180), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:09:27,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:09:27,104 INFO L93 Difference]: Finished difference Result 539 states and 624 transitions. [2022-03-20 13:09:27,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-03-20 13:09:27,104 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.0454545454545454) internal successors, (180), 87 states have internal predecessors, (180), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 188 [2022-03-20 13:09:27,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:09:27,105 INFO L225 Difference]: With dead ends: 539 [2022-03-20 13:09:27,105 INFO L226 Difference]: Without dead ends: 525 [2022-03-20 13:09:27,108 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 549 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4073 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=29586, Invalid=37236, Unknown=0, NotChecked=0, Total=66822 [2022-03-20 13:09:27,108 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 1605 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 652 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1605 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 1186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 652 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 13:09:27,108 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1605 Valid, 36 Invalid, 1186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [652 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 13:09:27,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2022-03-20 13:09:27,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 191. [2022-03-20 13:09:27,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 186 states have (on average 1.010752688172043) internal successors, (188), 186 states have internal predecessors, (188), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:09:27,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 192 transitions. [2022-03-20 13:09:27,293 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 192 transitions. Word has length 188 [2022-03-20 13:09:27,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:09:27,293 INFO L478 AbstractCegarLoop]: Abstraction has 191 states and 192 transitions. [2022-03-20 13:09:27,293 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.0454545454545454) internal successors, (180), 87 states have internal predecessors, (180), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:09:27,293 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 192 transitions. [2022-03-20 13:09:27,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-03-20 13:09:27,294 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:09:27,294 INFO L499 BasicCegarLoop]: trace histogram [85, 85, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:09:27,314 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2022-03-20 13:09:27,494 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:09:27,494 INFO L403 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:09:27,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:09:27,495 INFO L85 PathProgramCache]: Analyzing trace with hash 939628153, now seen corresponding path program 171 times [2022-03-20 13:09:27,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:09:27,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [768260579] [2022-03-20 13:09:27,496 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:09:27,496 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:09:27,496 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:09:27,496 INFO L85 PathProgramCache]: Analyzing trace with hash 939628153, now seen corresponding path program 172 times [2022-03-20 13:09:27,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:09:27,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336342619] [2022-03-20 13:09:27,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:09:27,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:09:27,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:09:29,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:09:29,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:09:29,579 INFO L134 CoverageAnalysis]: Checked inductivity of 7232 backedges. 0 proven. 7225 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:09:29,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:09:29,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336342619] [2022-03-20 13:09:29,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336342619] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:09:29,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689813536] [2022-03-20 13:09:29,579 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:09:29,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:09:29,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:09:29,580 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:09:29,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-03-20 13:09:30,219 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:09:30,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:09:30,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 848 conjuncts, 87 conjunts are in the unsatisfiable core [2022-03-20 13:09:30,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:09:30,503 INFO L134 CoverageAnalysis]: Checked inductivity of 7232 backedges. 0 proven. 7225 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:09:30,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:09:36,581 INFO L134 CoverageAnalysis]: Checked inductivity of 7232 backedges. 0 proven. 7225 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:09:36,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689813536] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:09:36,581 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:09:36,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 88, 88] total 176 [2022-03-20 13:09:36,581 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:09:36,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [768260579] [2022-03-20 13:09:36,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [768260579] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:09:36,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:09:36,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-03-20 13:09:36,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309250405] [2022-03-20 13:09:36,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:09:36,582 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-03-20 13:09:36,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:09:36,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-03-20 13:09:36,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15227, Invalid=15573, Unknown=0, NotChecked=0, Total=30800 [2022-03-20 13:09:36,585 INFO L87 Difference]: Start difference. First operand 191 states and 192 transitions. Second operand has 89 states, 89 states have (on average 2.044943820224719) internal successors, (182), 88 states have internal predecessors, (182), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:09:52,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:09:52,417 INFO L93 Difference]: Finished difference Result 545 states and 631 transitions. [2022-03-20 13:09:52,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-03-20 13:09:52,418 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.044943820224719) internal successors, (182), 88 states have internal predecessors, (182), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 190 [2022-03-20 13:09:52,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:09:52,419 INFO L225 Difference]: With dead ends: 545 [2022-03-20 13:09:52,419 INFO L226 Difference]: Without dead ends: 531 [2022-03-20 13:09:52,421 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 555 GetRequests, 295 SyntacticMatches, 0 SemanticMatches, 260 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4164 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=30278, Invalid=38104, Unknown=0, NotChecked=0, Total=68382 [2022-03-20 13:09:52,421 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 1705 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 688 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1705 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 688 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 13:09:52,421 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1705 Valid, 46 Invalid, 1239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [688 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 13:09:52,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2022-03-20 13:09:52,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 193. [2022-03-20 13:09:52,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 188 states have (on average 1.0106382978723405) internal successors, (190), 188 states have internal predecessors, (190), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:09:52,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 194 transitions. [2022-03-20 13:09:52,607 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 194 transitions. Word has length 190 [2022-03-20 13:09:52,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:09:52,607 INFO L478 AbstractCegarLoop]: Abstraction has 193 states and 194 transitions. [2022-03-20 13:09:52,607 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.044943820224719) internal successors, (182), 88 states have internal predecessors, (182), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:09:52,607 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 194 transitions. [2022-03-20 13:09:52,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-03-20 13:09:52,607 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:09:52,608 INFO L499 BasicCegarLoop]: trace histogram [86, 86, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:09:52,628 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-03-20 13:09:52,808 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:09:52,808 INFO L403 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:09:52,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:09:52,808 INFO L85 PathProgramCache]: Analyzing trace with hash -722822373, now seen corresponding path program 173 times [2022-03-20 13:09:52,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:09:52,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [475694010] [2022-03-20 13:09:52,809 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:09:52,809 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:09:52,809 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:09:52,809 INFO L85 PathProgramCache]: Analyzing trace with hash -722822373, now seen corresponding path program 174 times [2022-03-20 13:09:52,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:09:52,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242091966] [2022-03-20 13:09:52,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:09:52,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:09:52,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:09:54,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:09:54,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:09:54,943 INFO L134 CoverageAnalysis]: Checked inductivity of 7403 backedges. 0 proven. 7396 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:09:54,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:09:54,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242091966] [2022-03-20 13:09:54,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242091966] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:09:54,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149787354] [2022-03-20 13:09:54,943 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:09:54,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:09:54,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:09:54,944 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:09:54,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-03-20 13:09:55,541 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 13:09:55,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:09:55,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 13:09:55,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:09:55,763 INFO L134 CoverageAnalysis]: Checked inductivity of 7403 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7396 trivial. 0 not checked. [2022-03-20 13:09:55,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:09:56,067 INFO L134 CoverageAnalysis]: Checked inductivity of 7403 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7396 trivial. 0 not checked. [2022-03-20 13:09:56,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149787354] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:09:56,067 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:09:56,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 7, 7] total 96 [2022-03-20 13:09:56,067 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:09:56,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [475694010] [2022-03-20 13:09:56,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [475694010] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:09:56,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:09:56,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-03-20 13:09:56,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064070869] [2022-03-20 13:09:56,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:09:56,068 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-03-20 13:09:56,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:09:56,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-03-20 13:09:56,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4284, Invalid=4836, Unknown=0, NotChecked=0, Total=9120 [2022-03-20 13:09:56,069 INFO L87 Difference]: Start difference. First operand 193 states and 194 transitions. Second operand has 90 states, 90 states have (on average 2.0444444444444443) internal successors, (184), 89 states have internal predecessors, (184), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:10:12,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:10:12,177 INFO L93 Difference]: Finished difference Result 551 states and 638 transitions. [2022-03-20 13:10:12,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-03-20 13:10:12,182 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.0444444444444443) internal successors, (184), 89 states have internal predecessors, (184), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 192 [2022-03-20 13:10:12,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:10:12,183 INFO L225 Difference]: With dead ends: 551 [2022-03-20 13:10:12,183 INFO L226 Difference]: Without dead ends: 537 [2022-03-20 13:10:12,184 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 561 GetRequests, 379 SyntacticMatches, 1 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4352 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=12376, Invalid=20930, Unknown=0, NotChecked=0, Total=33306 [2022-03-20 13:10:12,185 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 1332 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 560 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1332 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 560 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 13:10:12,185 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1332 Valid, 46 Invalid, 1117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [560 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 13:10:12,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2022-03-20 13:10:12,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 195. [2022-03-20 13:10:12,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 190 states have (on average 1.0105263157894737) internal successors, (192), 190 states have internal predecessors, (192), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:10:12,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 196 transitions. [2022-03-20 13:10:12,384 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 196 transitions. Word has length 192 [2022-03-20 13:10:12,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:10:12,384 INFO L478 AbstractCegarLoop]: Abstraction has 195 states and 196 transitions. [2022-03-20 13:10:12,384 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.0444444444444443) internal successors, (184), 89 states have internal predecessors, (184), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:10:12,384 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 196 transitions. [2022-03-20 13:10:12,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-03-20 13:10:12,384 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:10:12,385 INFO L499 BasicCegarLoop]: trace histogram [87, 87, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:10:12,404 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-03-20 13:10:12,585 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-03-20 13:10:12,586 INFO L403 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:10:12,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:10:12,586 INFO L85 PathProgramCache]: Analyzing trace with hash -609943747, now seen corresponding path program 175 times [2022-03-20 13:10:12,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:10:12,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [761639945] [2022-03-20 13:10:12,587 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:10:12,587 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:10:12,587 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:10:12,587 INFO L85 PathProgramCache]: Analyzing trace with hash -609943747, now seen corresponding path program 176 times [2022-03-20 13:10:12,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:10:12,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497950627] [2022-03-20 13:10:12,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:10:12,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:10:12,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:10:14,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:10:14,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:10:14,724 INFO L134 CoverageAnalysis]: Checked inductivity of 7576 backedges. 0 proven. 7569 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:10:14,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:10:14,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497950627] [2022-03-20 13:10:14,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497950627] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:10:14,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411143804] [2022-03-20 13:10:14,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:10:14,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:10:14,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:10:14,726 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:10:14,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-03-20 13:10:15,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:10:15,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:10:15,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 866 conjuncts, 89 conjunts are in the unsatisfiable core [2022-03-20 13:10:15,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:10:15,639 INFO L134 CoverageAnalysis]: Checked inductivity of 7576 backedges. 0 proven. 7569 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:10:15,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:10:21,922 INFO L134 CoverageAnalysis]: Checked inductivity of 7576 backedges. 0 proven. 7569 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:10:21,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411143804] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:10:21,922 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:10:21,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 90, 90] total 180 [2022-03-20 13:10:21,922 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:10:21,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [761639945] [2022-03-20 13:10:21,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [761639945] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:10:21,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:10:21,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-03-20 13:10:21,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919118664] [2022-03-20 13:10:21,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:10:21,923 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-03-20 13:10:21,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:10:21,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-03-20 13:10:21,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15933, Invalid=16287, Unknown=0, NotChecked=0, Total=32220 [2022-03-20 13:10:21,926 INFO L87 Difference]: Start difference. First operand 195 states and 196 transitions. Second operand has 91 states, 91 states have (on average 2.043956043956044) internal successors, (186), 90 states have internal predecessors, (186), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:10:39,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:10:39,059 INFO L93 Difference]: Finished difference Result 557 states and 645 transitions. [2022-03-20 13:10:39,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-03-20 13:10:39,060 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.043956043956044) internal successors, (186), 90 states have internal predecessors, (186), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 194 [2022-03-20 13:10:39,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:10:39,061 INFO L225 Difference]: With dead ends: 557 [2022-03-20 13:10:39,061 INFO L226 Difference]: Without dead ends: 543 [2022-03-20 13:10:39,064 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 567 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 266 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4349 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=31686, Invalid=39870, Unknown=0, NotChecked=0, Total=71556 [2022-03-20 13:10:39,064 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 1506 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 624 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1506 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 624 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 13:10:39,064 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1506 Valid, 46 Invalid, 1187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [624 Valid, 563 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 13:10:39,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2022-03-20 13:10:39,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 197. [2022-03-20 13:10:39,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 192 states have (on average 1.0104166666666667) internal successors, (194), 192 states have internal predecessors, (194), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:10:39,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 198 transitions. [2022-03-20 13:10:39,263 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 198 transitions. Word has length 194 [2022-03-20 13:10:39,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:10:39,263 INFO L478 AbstractCegarLoop]: Abstraction has 197 states and 198 transitions. [2022-03-20 13:10:39,263 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.043956043956044) internal successors, (186), 90 states have internal predecessors, (186), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:10:39,263 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 198 transitions. [2022-03-20 13:10:39,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-03-20 13:10:39,264 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:10:39,264 INFO L499 BasicCegarLoop]: trace histogram [88, 88, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:10:39,284 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-03-20 13:10:39,484 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:10:39,484 INFO L403 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:10:39,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:10:39,484 INFO L85 PathProgramCache]: Analyzing trace with hash 492233439, now seen corresponding path program 177 times [2022-03-20 13:10:39,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:10:39,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [715840686] [2022-03-20 13:10:39,486 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:10:39,486 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:10:39,486 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:10:39,486 INFO L85 PathProgramCache]: Analyzing trace with hash 492233439, now seen corresponding path program 178 times [2022-03-20 13:10:39,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:10:39,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390317415] [2022-03-20 13:10:39,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:10:39,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:10:39,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:10:41,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:10:41,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:10:41,701 INFO L134 CoverageAnalysis]: Checked inductivity of 7751 backedges. 0 proven. 7744 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:10:41,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:10:41,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390317415] [2022-03-20 13:10:41,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390317415] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:10:41,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081888583] [2022-03-20 13:10:41,702 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:10:41,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:10:41,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:10:41,703 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:10:41,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-03-20 13:10:42,374 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:10:42,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:10:42,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 875 conjuncts, 90 conjunts are in the unsatisfiable core [2022-03-20 13:10:42,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:10:42,647 INFO L134 CoverageAnalysis]: Checked inductivity of 7751 backedges. 0 proven. 7744 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:10:42,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:10:49,098 INFO L134 CoverageAnalysis]: Checked inductivity of 7751 backedges. 0 proven. 7744 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:10:49,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081888583] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:10:49,098 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:10:49,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 91, 91] total 182 [2022-03-20 13:10:49,099 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:10:49,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [715840686] [2022-03-20 13:10:49,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [715840686] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:10:49,099 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:10:49,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-03-20 13:10:49,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271323768] [2022-03-20 13:10:49,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:10:49,099 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-03-20 13:10:49,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:10:49,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-03-20 13:10:49,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16292, Invalid=16650, Unknown=0, NotChecked=0, Total=32942 [2022-03-20 13:10:49,103 INFO L87 Difference]: Start difference. First operand 197 states and 198 transitions. Second operand has 92 states, 92 states have (on average 2.0434782608695654) internal successors, (188), 91 states have internal predecessors, (188), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:11:06,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:11:06,784 INFO L93 Difference]: Finished difference Result 563 states and 652 transitions. [2022-03-20 13:11:06,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-03-20 13:11:06,784 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.0434782608695654) internal successors, (188), 91 states have internal predecessors, (188), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 196 [2022-03-20 13:11:06,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:11:06,786 INFO L225 Difference]: With dead ends: 563 [2022-03-20 13:11:06,786 INFO L226 Difference]: Without dead ends: 549 [2022-03-20 13:11:06,788 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 573 GetRequests, 304 SyntacticMatches, 0 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4443 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=32402, Invalid=40768, Unknown=0, NotChecked=0, Total=73170 [2022-03-20 13:11:06,788 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 1681 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 684 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1681 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 1228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 684 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 13:11:06,789 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1681 Valid, 21 Invalid, 1228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [684 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 13:11:06,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2022-03-20 13:11:06,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 199. [2022-03-20 13:11:06,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 194 states have (on average 1.0103092783505154) internal successors, (196), 194 states have internal predecessors, (196), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:11:06,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 200 transitions. [2022-03-20 13:11:06,993 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 200 transitions. Word has length 196 [2022-03-20 13:11:06,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:11:06,993 INFO L478 AbstractCegarLoop]: Abstraction has 199 states and 200 transitions. [2022-03-20 13:11:06,993 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.0434782608695654) internal successors, (188), 91 states have internal predecessors, (188), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:11:06,993 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 200 transitions. [2022-03-20 13:11:06,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2022-03-20 13:11:06,994 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:11:06,994 INFO L499 BasicCegarLoop]: trace histogram [89, 89, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:11:07,016 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-03-20 13:11:07,194 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:11:07,194 INFO L403 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:11:07,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:11:07,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1172412927, now seen corresponding path program 179 times [2022-03-20 13:11:07,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:11:07,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1460183233] [2022-03-20 13:11:07,195 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:11:07,196 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:11:07,196 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:11:07,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1172412927, now seen corresponding path program 180 times [2022-03-20 13:11:07,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:11:07,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225180999] [2022-03-20 13:11:07,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:11:07,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:11:07,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:11:09,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:11:09,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:11:09,445 INFO L134 CoverageAnalysis]: Checked inductivity of 7928 backedges. 0 proven. 7921 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:11:09,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:11:09,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225180999] [2022-03-20 13:11:09,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225180999] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:11:09,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063335898] [2022-03-20 13:11:09,445 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:11:09,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:11:09,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:11:09,446 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:11:09,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-03-20 13:11:10,060 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 13:11:10,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:11:10,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 13:11:10,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:11:10,297 INFO L134 CoverageAnalysis]: Checked inductivity of 7928 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7921 trivial. 0 not checked. [2022-03-20 13:11:10,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:11:10,612 INFO L134 CoverageAnalysis]: Checked inductivity of 7928 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7921 trivial. 0 not checked. [2022-03-20 13:11:10,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063335898] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:11:10,612 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:11:10,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 7, 7] total 99 [2022-03-20 13:11:10,612 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:11:10,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1460183233] [2022-03-20 13:11:10,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1460183233] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:11:10,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:11:10,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-03-20 13:11:10,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102411279] [2022-03-20 13:11:10,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:11:10,613 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-03-20 13:11:10,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:11:10,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-03-20 13:11:10,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4566, Invalid=5136, Unknown=0, NotChecked=0, Total=9702 [2022-03-20 13:11:10,615 INFO L87 Difference]: Start difference. First operand 199 states and 200 transitions. Second operand has 93 states, 93 states have (on average 2.043010752688172) internal successors, (190), 92 states have internal predecessors, (190), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:11:27,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:11:27,876 INFO L93 Difference]: Finished difference Result 569 states and 659 transitions. [2022-03-20 13:11:27,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-03-20 13:11:27,876 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 2.043010752688172) internal successors, (190), 92 states have internal predecessors, (190), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 198 [2022-03-20 13:11:27,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:11:27,878 INFO L225 Difference]: With dead ends: 569 [2022-03-20 13:11:27,878 INFO L226 Difference]: Without dead ends: 555 [2022-03-20 13:11:27,879 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 579 GetRequests, 391 SyntacticMatches, 1 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4637 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=13207, Invalid=22325, Unknown=0, NotChecked=0, Total=35532 [2022-03-20 13:11:27,879 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 1537 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 637 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1537 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 1217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 637 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 13:11:27,879 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1537 Valid, 51 Invalid, 1217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [637 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 13:11:27,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2022-03-20 13:11:28,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 201. [2022-03-20 13:11:28,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 196 states have (on average 1.010204081632653) internal successors, (198), 196 states have internal predecessors, (198), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:11:28,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 202 transitions. [2022-03-20 13:11:28,095 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 202 transitions. Word has length 198 [2022-03-20 13:11:28,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:11:28,095 INFO L478 AbstractCegarLoop]: Abstraction has 201 states and 202 transitions. [2022-03-20 13:11:28,095 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 2.043010752688172) internal successors, (190), 92 states have internal predecessors, (190), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:11:28,095 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 202 transitions. [2022-03-20 13:11:28,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2022-03-20 13:11:28,096 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:11:28,096 INFO L499 BasicCegarLoop]: trace histogram [90, 90, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:11:28,115 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-03-20 13:11:28,296 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:11:28,296 INFO L403 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:11:28,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:11:28,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1125230755, now seen corresponding path program 181 times [2022-03-20 13:11:28,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:11:28,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1790832681] [2022-03-20 13:11:28,298 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:11:28,298 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:11:28,298 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:11:28,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1125230755, now seen corresponding path program 182 times [2022-03-20 13:11:28,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:11:28,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930678180] [2022-03-20 13:11:28,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:11:28,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:11:28,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:11:30,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:11:30,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:11:30,627 INFO L134 CoverageAnalysis]: Checked inductivity of 8107 backedges. 0 proven. 8100 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:11:30,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:11:30,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930678180] [2022-03-20 13:11:30,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930678180] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:11:30,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979771546] [2022-03-20 13:11:30,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:11:30,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:11:30,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:11:30,629 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:11:30,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-03-20 13:11:31,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:11:31,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:11:31,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 893 conjuncts, 92 conjunts are in the unsatisfiable core [2022-03-20 13:11:31,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:11:31,602 INFO L134 CoverageAnalysis]: Checked inductivity of 8107 backedges. 0 proven. 8100 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:11:31,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:11:38,227 INFO L134 CoverageAnalysis]: Checked inductivity of 8107 backedges. 0 proven. 8100 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:11:38,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979771546] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:11:38,227 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:11:38,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 93, 93] total 186 [2022-03-20 13:11:38,227 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:11:38,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1790832681] [2022-03-20 13:11:38,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1790832681] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:11:38,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:11:38,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-03-20 13:11:38,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689425606] [2022-03-20 13:11:38,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:11:38,228 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-03-20 13:11:38,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:11:38,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-03-20 13:11:38,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17022, Invalid=17388, Unknown=0, NotChecked=0, Total=34410 [2022-03-20 13:11:38,230 INFO L87 Difference]: Start difference. First operand 201 states and 202 transitions. Second operand has 94 states, 94 states have (on average 2.0425531914893615) internal successors, (192), 93 states have internal predecessors, (192), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:11:56,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:11:56,698 INFO L93 Difference]: Finished difference Result 575 states and 666 transitions. [2022-03-20 13:11:56,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-03-20 13:11:56,699 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.0425531914893615) internal successors, (192), 93 states have internal predecessors, (192), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 200 [2022-03-20 13:11:56,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:11:56,700 INFO L225 Difference]: With dead ends: 575 [2022-03-20 13:11:56,700 INFO L226 Difference]: Without dead ends: 561 [2022-03-20 13:11:56,703 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 585 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4634 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=33858, Invalid=42594, Unknown=0, NotChecked=0, Total=76452 [2022-03-20 13:11:56,703 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 1644 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 673 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1644 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 1243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 673 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 13:11:56,703 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1644 Valid, 36 Invalid, 1243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [673 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 13:11:56,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2022-03-20 13:11:56,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 203. [2022-03-20 13:11:56,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 198 states have (on average 1.0101010101010102) internal successors, (200), 198 states have internal predecessors, (200), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:11:56,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 204 transitions. [2022-03-20 13:11:56,917 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 204 transitions. Word has length 200 [2022-03-20 13:11:56,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:11:56,917 INFO L478 AbstractCegarLoop]: Abstraction has 203 states and 204 transitions. [2022-03-20 13:11:56,918 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 2.0425531914893615) internal successors, (192), 93 states have internal predecessors, (192), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:11:56,918 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 204 transitions. [2022-03-20 13:11:56,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2022-03-20 13:11:56,918 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:11:56,918 INFO L499 BasicCegarLoop]: trace histogram [91, 91, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:11:56,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-03-20 13:11:57,118 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:11:57,119 INFO L403 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:11:57,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:11:57,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1547619013, now seen corresponding path program 183 times [2022-03-20 13:11:57,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:11:57,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1536702668] [2022-03-20 13:11:57,120 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:11:57,120 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:11:57,120 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:11:57,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1547619013, now seen corresponding path program 184 times [2022-03-20 13:11:57,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:11:57,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498432735] [2022-03-20 13:11:57,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:11:57,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:11:57,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:11:59,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:11:59,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:11:59,436 INFO L134 CoverageAnalysis]: Checked inductivity of 8288 backedges. 0 proven. 8281 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:11:59,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:11:59,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498432735] [2022-03-20 13:11:59,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498432735] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:11:59,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559922771] [2022-03-20 13:11:59,436 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:11:59,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:11:59,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:11:59,437 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:11:59,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-03-20 13:12:00,148 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:12:00,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:12:00,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 902 conjuncts, 93 conjunts are in the unsatisfiable core [2022-03-20 13:12:00,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:12:00,408 INFO L134 CoverageAnalysis]: Checked inductivity of 8288 backedges. 0 proven. 8281 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:12:00,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:12:07,236 INFO L134 CoverageAnalysis]: Checked inductivity of 8288 backedges. 0 proven. 8281 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:12:07,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559922771] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:12:07,237 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:12:07,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 94, 94] total 188 [2022-03-20 13:12:07,237 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:12:07,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1536702668] [2022-03-20 13:12:07,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1536702668] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:12:07,237 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:12:07,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-03-20 13:12:07,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164999396] [2022-03-20 13:12:07,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:12:07,237 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-03-20 13:12:07,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:12:07,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-03-20 13:12:07,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17393, Invalid=17763, Unknown=0, NotChecked=0, Total=35156 [2022-03-20 13:12:07,242 INFO L87 Difference]: Start difference. First operand 203 states and 204 transitions. Second operand has 95 states, 95 states have (on average 2.042105263157895) internal successors, (194), 94 states have internal predecessors, (194), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:12:26,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:12:26,499 INFO L93 Difference]: Finished difference Result 581 states and 673 transitions. [2022-03-20 13:12:26,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-03-20 13:12:26,507 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.042105263157895) internal successors, (194), 94 states have internal predecessors, (194), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 202 [2022-03-20 13:12:26,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:12:26,509 INFO L225 Difference]: With dead ends: 581 [2022-03-20 13:12:26,509 INFO L226 Difference]: Without dead ends: 567 [2022-03-20 13:12:26,511 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 591 GetRequests, 313 SyntacticMatches, 0 SemanticMatches, 278 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4731 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=34598, Invalid=43522, Unknown=0, NotChecked=0, Total=78120 [2022-03-20 13:12:26,511 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 1683 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 684 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1683 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 1275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 684 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 13:12:26,512 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1683 Valid, 51 Invalid, 1275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [684 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 13:12:26,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2022-03-20 13:12:26,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 205. [2022-03-20 13:12:26,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 200 states have (on average 1.01) internal successors, (202), 200 states have internal predecessors, (202), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:12:26,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 206 transitions. [2022-03-20 13:12:26,730 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 206 transitions. Word has length 202 [2022-03-20 13:12:26,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:12:26,730 INFO L478 AbstractCegarLoop]: Abstraction has 205 states and 206 transitions. [2022-03-20 13:12:26,730 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.042105263157895) internal successors, (194), 94 states have internal predecessors, (194), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:12:26,730 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 206 transitions. [2022-03-20 13:12:26,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-03-20 13:12:26,731 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:12:26,731 INFO L499 BasicCegarLoop]: trace histogram [92, 92, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:12:26,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-03-20 13:12:26,937 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:12:26,937 INFO L403 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:12:26,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:12:26,937 INFO L85 PathProgramCache]: Analyzing trace with hash -559158169, now seen corresponding path program 185 times [2022-03-20 13:12:26,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:12:26,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1405269988] [2022-03-20 13:12:26,939 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:12:26,939 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:12:26,939 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:12:26,939 INFO L85 PathProgramCache]: Analyzing trace with hash -559158169, now seen corresponding path program 186 times [2022-03-20 13:12:26,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:12:26,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159587176] [2022-03-20 13:12:26,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:12:26,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:12:26,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:12:29,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:12:29,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:12:29,322 INFO L134 CoverageAnalysis]: Checked inductivity of 8471 backedges. 0 proven. 8464 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 13:12:29,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:12:29,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159587176] [2022-03-20 13:12:29,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159587176] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:12:29,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94763841] [2022-03-20 13:12:29,322 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:12:29,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:12:29,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:12:29,323 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:12:29,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-03-20 13:12:29,980 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 13:12:29,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:12:29,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 13:12:29,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:12:30,222 INFO L134 CoverageAnalysis]: Checked inductivity of 8471 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8464 trivial. 0 not checked. [2022-03-20 13:12:30,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:12:30,539 INFO L134 CoverageAnalysis]: Checked inductivity of 8471 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8464 trivial. 0 not checked. [2022-03-20 13:12:30,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94763841] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:12:30,539 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:12:30,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 7, 7] total 102 [2022-03-20 13:12:30,539 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:12:30,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1405269988] [2022-03-20 13:12:30,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1405269988] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:12:30,540 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:12:30,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-03-20 13:12:30,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605290095] [2022-03-20 13:12:30,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:12:30,540 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-03-20 13:12:30,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:12:30,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-03-20 13:12:30,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4857, Invalid=5445, Unknown=0, NotChecked=0, Total=10302 [2022-03-20 13:12:30,542 INFO L87 Difference]: Start difference. First operand 205 states and 206 transitions. Second operand has 96 states, 96 states have (on average 2.0416666666666665) internal successors, (196), 95 states have internal predecessors, (196), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)