/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/loop-invgen/string_concat-noarr.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 20:00:07,022 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 20:00:07,023 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 20:00:07,052 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 20:00:07,100 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 20:00:07,100 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 20:00:07,101 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 20:00:07,101 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-04-06 20:00:07,106 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 20:00:07,107 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 20:00:07,107 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 20:00:07,108 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 20:00:07,108 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 20:00:07,108 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 20:00:07,108 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 20:00:07,108 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 20:00:07,108 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 20:00:07,108 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 20:00:07,108 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 20:00:07,109 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 20:00:07,109 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 20:00:07,109 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 20:00:07,109 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 20:00:07,109 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 20:00:07,109 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 20:00:07,109 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 20:00:07,109 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 20:00:07,109 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 20:00:07,110 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 20:00:07,110 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-06 20:00:07,110 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 20:00:07,305 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 20:00:07,322 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 20:00:07,326 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 20:00:07,327 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 20:00:07,327 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 20:00:07,328 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/string_concat-noarr.i [2022-04-06 20:00:07,387 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17a025c60/12f966d537fe485183f724b7150c7161/FLAGc12fe1638 [2022-04-06 20:00:07,749 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 20:00:07,750 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/string_concat-noarr.i [2022-04-06 20:00:07,754 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17a025c60/12f966d537fe485183f724b7150c7161/FLAGc12fe1638 [2022-04-06 20:00:07,765 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17a025c60/12f966d537fe485183f724b7150c7161 [2022-04-06 20:00:07,768 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 20:00:07,770 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 20:00:07,773 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 20:00:07,773 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 20:00:07,776 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 20:00:07,776 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 08:00:07" (1/1) ... [2022-04-06 20:00:07,777 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1aa20b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:00:07, skipping insertion in model container [2022-04-06 20:00:07,777 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 08:00:07" (1/1) ... [2022-04-06 20:00:07,782 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 20:00:07,791 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 20:00:07,907 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-invgen/string_concat-noarr.i[893,906] [2022-04-06 20:00:07,917 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 20:00:07,922 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 20:00:07,933 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-invgen/string_concat-noarr.i[893,906] [2022-04-06 20:00:07,935 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 20:00:07,943 INFO L208 MainTranslator]: Completed translation [2022-04-06 20:00:07,944 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:00:07 WrapperNode [2022-04-06 20:00:07,944 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 20:00:07,944 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 20:00:07,945 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 20:00:07,945 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 20:00:07,954 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:00:07" (1/1) ... [2022-04-06 20:00:07,954 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:00:07" (1/1) ... [2022-04-06 20:00:07,960 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:00:07" (1/1) ... [2022-04-06 20:00:07,960 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:00:07" (1/1) ... [2022-04-06 20:00:07,963 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:00:07" (1/1) ... [2022-04-06 20:00:07,965 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:00:07" (1/1) ... [2022-04-06 20:00:07,966 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:00:07" (1/1) ... [2022-04-06 20:00:07,967 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 20:00:07,968 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 20:00:07,968 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 20:00:07,968 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 20:00:07,968 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:00:07" (1/1) ... [2022-04-06 20:00:07,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 20:00:07,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:00:07,995 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-06 20:00:08,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-06 20:00:08,020 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 20:00:08,020 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 20:00:08,020 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 20:00:08,020 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 20:00:08,020 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 20:00:08,020 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 20:00:08,020 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 20:00:08,020 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 20:00:08,020 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-04-06 20:00:08,020 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-04-06 20:00:08,020 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 20:00:08,020 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 20:00:08,021 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 20:00:08,021 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 20:00:08,021 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 20:00:08,021 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 20:00:08,021 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 20:00:08,021 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 20:00:08,021 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 20:00:08,021 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 20:00:08,021 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 20:00:08,021 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 20:00:08,078 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 20:00:08,079 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 20:00:08,160 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 20:00:08,164 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 20:00:08,164 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-06 20:00:08,165 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 08:00:08 BoogieIcfgContainer [2022-04-06 20:00:08,165 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 20:00:08,166 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 20:00:08,166 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 20:00:08,168 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 20:00:08,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 08:00:07" (1/3) ... [2022-04-06 20:00:08,169 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79f30096 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 08:00:08, skipping insertion in model container [2022-04-06 20:00:08,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:00:07" (2/3) ... [2022-04-06 20:00:08,169 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79f30096 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 08:00:08, skipping insertion in model container [2022-04-06 20:00:08,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 08:00:08" (3/3) ... [2022-04-06 20:00:08,170 INFO L111 eAbstractionObserver]: Analyzing ICFG string_concat-noarr.i [2022-04-06 20:00:08,173 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 20:00:08,173 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 20:00:08,199 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 20:00:08,209 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 20:00:08,209 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 20:00:08,222 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 19 states have internal predecessors, (26), 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) [2022-04-06 20:00:08,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-04-06 20:00:08,230 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:00:08,231 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:00:08,231 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:00:08,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:00:08,234 INFO L85 PathProgramCache]: Analyzing trace with hash -623416428, now seen corresponding path program 1 times [2022-04-06 20:00:08,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:00:08,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1479043227] [2022-04-06 20:00:08,248 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:00:08,248 INFO L85 PathProgramCache]: Analyzing trace with hash -623416428, now seen corresponding path program 2 times [2022-04-06 20:00:08,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:00:08,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286760425] [2022-04-06 20:00:08,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:00:08,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:00:08,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:00:08,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:00:08,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:00:08,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:08,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:00:08,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286760425] [2022-04-06 20:00:08,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286760425] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:00:08,379 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:00:08,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 20:00:08,381 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:00:08,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1479043227] [2022-04-06 20:00:08,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1479043227] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:00:08,382 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:00:08,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 20:00:08,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738020396] [2022-04-06 20:00:08,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:00:08,385 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 20:00:08,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:00:08,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 20:00:08,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 20:00:08,405 INFO L87 Difference]: Start difference. First operand has 26 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 19 states have internal predecessors, (26), 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 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:00:08,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:00:08,430 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2022-04-06 20:00:08,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 20:00:08,432 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 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 15 [2022-04-06 20:00:08,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:00:08,436 INFO L225 Difference]: With dead ends: 43 [2022-04-06 20:00:08,436 INFO L226 Difference]: Without dead ends: 18 [2022-04-06 20:00:08,438 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 [2022-04-06 20:00:08,440 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 31 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 [2022-04-06 20:00:08,441 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 31 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:00:08,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-04-06 20:00:08,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-04-06 20:00:08,460 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) [2022-04-06 20:00:08,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-04-06 20:00:08,462 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 15 [2022-04-06 20:00:08,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:00:08,462 INFO L478 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-04-06 20:00:08,462 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:00:08,462 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-04-06 20:00:08,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 20:00:08,463 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:00:08,463 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:00:08,463 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 20:00:08,463 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:00:08,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:00:08,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1308012743, now seen corresponding path program 1 times [2022-04-06 20:00:08,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:00:08,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1929323742] [2022-04-06 20:00:08,465 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:00:08,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1308012743, now seen corresponding path program 2 times [2022-04-06 20:00:08,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:00:08,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088695084] [2022-04-06 20:00:08,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:00:08,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:00:08,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:00:08,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:00:08,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:00:08,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:08,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:00:08,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088695084] [2022-04-06 20:00:08,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088695084] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:00:08,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:00:08,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 20:00:08,576 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:00:08,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1929323742] [2022-04-06 20:00:08,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1929323742] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:00:08,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:00:08,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 20:00:08,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103115236] [2022-04-06 20:00:08,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:00:08,577 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 20:00:08,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:00:08,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 20:00:08,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 20:00:08,578 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:00:08,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:00:08,668 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2022-04-06 20:00:08,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 20:00:08,668 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 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 17 [2022-04-06 20:00:08,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:00:08,669 INFO L225 Difference]: With dead ends: 29 [2022-04-06 20:00:08,669 INFO L226 Difference]: Without dead ends: 23 [2022-04-06 20:00:08,670 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-04-06 20:00:08,670 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 21 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:00:08,671 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 30 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:00:08,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-04-06 20:00:08,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2022-04-06 20:00:08,675 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) [2022-04-06 20:00:08,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2022-04-06 20:00:08,676 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2022-04-06 20:00:08,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:00:08,676 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2022-04-06 20:00:08,676 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:00:08,677 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2022-04-06 20:00:08,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-04-06 20:00:08,677 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:00:08,677 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:00:08,677 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 20:00:08,677 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:00:08,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:00:08,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1066675892, now seen corresponding path program 1 times [2022-04-06 20:00:08,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:00:08,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [685418064] [2022-04-06 20:00:08,679 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:00:08,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1066675892, now seen corresponding path program 2 times [2022-04-06 20:00:08,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:00:08,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566161352] [2022-04-06 20:00:08,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:00:08,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:00:08,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:00:08,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:00:08,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:00:08,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:08,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:00:08,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566161352] [2022-04-06 20:00:08,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566161352] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:00:08,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107876324] [2022-04-06 20:00:08,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:00:08,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:00:08,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:00:08,733 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:00:08,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 20:00:08,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:00:08,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:00:08,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 20:00:08,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:00:08,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:08,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:00:08,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:08,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107876324] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:00:08,933 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:00:08,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-04-06 20:00:08,934 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:00:08,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [685418064] [2022-04-06 20:00:08,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [685418064] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:00:08,934 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:00:08,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 20:00:08,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497884687] [2022-04-06 20:00:08,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:00:08,934 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 20:00:08,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:00:08,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 20:00:08,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-04-06 20:00:08,935 INFO L87 Difference]: Start difference. First operand 20 states and 21 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) [2022-04-06 20:00:09,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:00:09,004 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2022-04-06 20:00:09,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 20:00:09,004 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 19 [2022-04-06 20:00:09,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:00:09,006 INFO L225 Difference]: With dead ends: 38 [2022-04-06 20:00:09,006 INFO L226 Difference]: Without dead ends: 32 [2022-04-06 20:00:09,007 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-04-06 20:00:09,007 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 31 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:00:09,008 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 30 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:00:09,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-04-06 20:00:09,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 25. [2022-04-06 20:00:09,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 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) [2022-04-06 20:00:09,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2022-04-06 20:00:09,013 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 19 [2022-04-06 20:00:09,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:00:09,013 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2022-04-06 20:00:09,013 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) [2022-04-06 20:00:09,013 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2022-04-06 20:00:09,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-04-06 20:00:09,013 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:00:09,014 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:00:09,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 20:00:09,230 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:00:09,230 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:00:09,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:00:09,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1780147345, now seen corresponding path program 3 times [2022-04-06 20:00:09,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:00:09,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1465411305] [2022-04-06 20:00:09,231 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:00:09,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1780147345, now seen corresponding path program 4 times [2022-04-06 20:00:09,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:00:09,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96825487] [2022-04-06 20:00:09,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:00:09,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:00:09,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:00:09,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:00:09,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:00:09,313 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:09,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:00:09,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96825487] [2022-04-06 20:00:09,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96825487] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:00:09,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981509688] [2022-04-06 20:00:09,314 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:00:09,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:00:09,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:00:09,328 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:00:09,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 20:00:09,358 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:00:09,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:00:09,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 20:00:09,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:00:09,411 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:09,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:00:09,474 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:09,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981509688] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:00:09,474 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:00:09,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-04-06 20:00:09,475 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:00:09,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1465411305] [2022-04-06 20:00:09,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1465411305] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:00:09,475 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:00:09,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 20:00:09,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792130264] [2022-04-06 20:00:09,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:00:09,475 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 20:00:09,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:00:09,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 20:00:09,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-04-06 20:00:09,476 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:00:09,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:00:09,552 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2022-04-06 20:00:09,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 20:00:09,552 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (3), 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 [2022-04-06 20:00:09,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:00:09,553 INFO L225 Difference]: With dead ends: 43 [2022-04-06 20:00:09,553 INFO L226 Difference]: Without dead ends: 37 [2022-04-06 20:00:09,553 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2022-04-06 20:00:09,554 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 38 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:00:09,554 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 35 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:00:09,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-04-06 20:00:09,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2022-04-06 20:00:09,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 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) [2022-04-06 20:00:09,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-04-06 20:00:09,559 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 21 [2022-04-06 20:00:09,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:00:09,559 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-04-06 20:00:09,559 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:00:09,559 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-04-06 20:00:09,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 20:00:09,560 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:00:09,560 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:00:09,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 20:00:09,775 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-04-06 20:00:09,776 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:00:09,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:00:09,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1683110550, now seen corresponding path program 5 times [2022-04-06 20:00:09,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:00:09,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1248019373] [2022-04-06 20:00:09,777 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:00:09,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1683110550, now seen corresponding path program 6 times [2022-04-06 20:00:09,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:00:09,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458767549] [2022-04-06 20:00:09,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:00:09,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:00:09,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:00:09,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:00:09,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:00:09,832 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:09,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:00:09,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458767549] [2022-04-06 20:00:09,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458767549] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:00:09,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214161492] [2022-04-06 20:00:09,833 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:00:09,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:00:09,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:00:09,834 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:00:09,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 20:00:09,862 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-06 20:00:09,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:00:09,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:00:09,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:00:09,917 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:09,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:00:09,993 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:09,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214161492] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:00:09,993 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:00:09,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-04-06 20:00:09,994 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:00:09,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1248019373] [2022-04-06 20:00:09,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1248019373] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:00:09,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:00:09,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 20:00:09,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442925866] [2022-04-06 20:00:09,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:00:09,994 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 20:00:09,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:00:09,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 20:00:09,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-04-06 20:00:09,995 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:00:10,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:00:10,090 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2022-04-06 20:00:10,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 20:00:10,090 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 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 23 [2022-04-06 20:00:10,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:00:10,091 INFO L225 Difference]: With dead ends: 48 [2022-04-06 20:00:10,091 INFO L226 Difference]: Without dead ends: 42 [2022-04-06 20:00:10,091 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2022-04-06 20:00:10,092 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 48 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:00:10,092 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 35 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:00:10,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-04-06 20:00:10,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2022-04-06 20:00:10,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 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) [2022-04-06 20:00:10,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2022-04-06 20:00:10,097 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 23 [2022-04-06 20:00:10,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:00:10,097 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2022-04-06 20:00:10,097 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:00:10,098 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2022-04-06 20:00:10,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-04-06 20:00:10,098 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:00:10,098 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:00:10,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 20:00:10,318 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:00:10,319 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:00:10,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:00:10,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1374936229, now seen corresponding path program 7 times [2022-04-06 20:00:10,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:00:10,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2119805172] [2022-04-06 20:00:10,320 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:00:10,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1374936229, now seen corresponding path program 8 times [2022-04-06 20:00:10,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:00:10,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345408588] [2022-04-06 20:00:10,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:00:10,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:00:10,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:00:10,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:00:10,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:00:10,377 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:10,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:00:10,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345408588] [2022-04-06 20:00:10,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345408588] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:00:10,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894546726] [2022-04-06 20:00:10,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:00:10,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:00:10,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:00:10,378 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:00:10,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 20:00:10,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:00:10,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:00:10,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 20:00:10,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:00:10,510 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:10,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:00:10,597 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:10,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894546726] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:00:10,598 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:00:10,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-04-06 20:00:10,598 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:00:10,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2119805172] [2022-04-06 20:00:10,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2119805172] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:00:10,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:00:10,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 20:00:10,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438517282] [2022-04-06 20:00:10,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:00:10,599 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 20:00:10,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:00:10,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 20:00:10,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-04-06 20:00:10,600 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:00:10,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:00:10,708 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2022-04-06 20:00:10,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 20:00:10,709 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (3), 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 25 [2022-04-06 20:00:10,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:00:10,710 INFO L225 Difference]: With dead ends: 53 [2022-04-06 20:00:10,710 INFO L226 Difference]: Without dead ends: 47 [2022-04-06 20:00:10,711 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=166, Invalid=434, Unknown=0, NotChecked=0, Total=600 [2022-04-06 20:00:10,712 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 67 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:00:10,713 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 35 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:00:10,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-04-06 20:00:10,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2022-04-06 20:00:10,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 states have internal predecessors, (41), 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) [2022-04-06 20:00:10,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2022-04-06 20:00:10,724 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 25 [2022-04-06 20:00:10,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:00:10,724 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2022-04-06 20:00:10,725 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:00:10,725 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2022-04-06 20:00:10,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-06 20:00:10,725 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:00:10,725 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:00:10,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 20:00:10,931 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:00:10,931 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:00:10,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:00:10,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1894706912, now seen corresponding path program 9 times [2022-04-06 20:00:10,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:00:10,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [381499598] [2022-04-06 20:00:10,932 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:00:10,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1894706912, now seen corresponding path program 10 times [2022-04-06 20:00:10,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:00:10,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41907947] [2022-04-06 20:00:10,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:00:10,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:00:10,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:00:11,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:00:11,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:00:11,009 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:11,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:00:11,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41907947] [2022-04-06 20:00:11,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41907947] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:00:11,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371440046] [2022-04-06 20:00:11,009 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:00:11,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:00:11,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:00:11,015 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:00:11,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 20:00:11,055 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:00:11,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:00:11,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 20:00:11,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:00:11,119 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:11,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:00:11,239 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:11,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371440046] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:00:11,239 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:00:11,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 20 [2022-04-06 20:00:11,239 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:00:11,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [381499598] [2022-04-06 20:00:11,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [381499598] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:00:11,239 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:00:11,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 20:00:11,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473691144] [2022-04-06 20:00:11,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:00:11,240 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 20:00:11,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:00:11,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 20:00:11,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2022-04-06 20:00:11,240 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:00:11,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:00:11,382 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2022-04-06 20:00:11,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 20:00:11,382 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (3), 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 27 [2022-04-06 20:00:11,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:00:11,383 INFO L225 Difference]: With dead ends: 58 [2022-04-06 20:00:11,383 INFO L226 Difference]: Without dead ends: 52 [2022-04-06 20:00:11,383 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2022-04-06 20:00:11,384 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 74 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:00:11,384 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 40 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:00:11,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-04-06 20:00:11,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 45. [2022-04-06 20:00:11,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.175) internal successors, (47), 40 states have internal predecessors, (47), 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) [2022-04-06 20:00:11,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2022-04-06 20:00:11,390 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 27 [2022-04-06 20:00:11,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:00:11,391 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2022-04-06 20:00:11,391 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:00:11,391 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2022-04-06 20:00:11,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-06 20:00:11,391 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:00:11,391 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:00:11,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 20:00:11,608 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:00:11,608 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:00:11,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:00:11,608 INFO L85 PathProgramCache]: Analyzing trace with hash -105704741, now seen corresponding path program 11 times [2022-04-06 20:00:11,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:00:11,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [23732677] [2022-04-06 20:00:11,609 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:00:11,609 INFO L85 PathProgramCache]: Analyzing trace with hash -105704741, now seen corresponding path program 12 times [2022-04-06 20:00:11,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:00:11,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117045544] [2022-04-06 20:00:11,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:00:11,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:00:11,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:00:11,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:00:11,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:00:11,692 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:11,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:00:11,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117045544] [2022-04-06 20:00:11,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117045544] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:00:11,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300911751] [2022-04-06 20:00:11,692 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:00:11,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:00:11,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:00:11,695 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:00:11,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 20:00:11,728 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:00:11,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:00:11,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:00:11,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:00:11,777 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:11,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:00:11,886 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:11,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300911751] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:00:11,886 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:00:11,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 22 [2022-04-06 20:00:11,886 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:00:11,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [23732677] [2022-04-06 20:00:11,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [23732677] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:00:11,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:00:11,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 20:00:11,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801399186] [2022-04-06 20:00:11,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:00:11,887 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 20:00:11,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:00:11,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 20:00:11,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2022-04-06 20:00:11,888 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:00:12,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:00:12,001 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2022-04-06 20:00:12,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 20:00:12,001 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 2 states have call successors, (3), 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 29 [2022-04-06 20:00:12,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:00:12,002 INFO L225 Difference]: With dead ends: 63 [2022-04-06 20:00:12,002 INFO L226 Difference]: Without dead ends: 57 [2022-04-06 20:00:12,002 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=278, Invalid=652, Unknown=0, NotChecked=0, Total=930 [2022-04-06 20:00:12,003 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 75 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:00:12,003 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 45 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:00:12,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-04-06 20:00:12,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 50. [2022-04-06 20:00:12,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 45 states have internal predecessors, (53), 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) [2022-04-06 20:00:12,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2022-04-06 20:00:12,021 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 29 [2022-04-06 20:00:12,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:00:12,022 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2022-04-06 20:00:12,022 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:00:12,022 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2022-04-06 20:00:12,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-06 20:00:12,022 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:00:12,022 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:00:12,039 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-04-06 20:00:12,223 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:00:12,223 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:00:12,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:00:12,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1138463190, now seen corresponding path program 13 times [2022-04-06 20:00:12,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:00:12,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2068508253] [2022-04-06 20:00:12,224 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:00:12,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1138463190, now seen corresponding path program 14 times [2022-04-06 20:00:12,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:00:12,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63339338] [2022-04-06 20:00:12,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:00:12,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:00:12,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:00:12,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:00:12,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:00:12,306 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:12,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:00:12,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63339338] [2022-04-06 20:00:12,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63339338] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:00:12,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791313755] [2022-04-06 20:00:12,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:00:12,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:00:12,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:00:12,324 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:00:12,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 20:00:12,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:00:12,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:00:12,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 20:00:12,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:00:12,416 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:12,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:00:12,554 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:12,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791313755] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:00:12,554 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:00:12,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 24 [2022-04-06 20:00:12,554 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:00:12,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2068508253] [2022-04-06 20:00:12,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2068508253] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:00:12,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:00:12,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 20:00:12,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681823051] [2022-04-06 20:00:12,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:00:12,555 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 20:00:12,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:00:12,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 20:00:12,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2022-04-06 20:00:12,555 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:00:12,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:00:12,746 INFO L93 Difference]: Finished difference Result 68 states and 77 transitions. [2022-04-06 20:00:12,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 20:00:12,746 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 2 states have call successors, (3), 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 31 [2022-04-06 20:00:12,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:00:12,747 INFO L225 Difference]: With dead ends: 68 [2022-04-06 20:00:12,747 INFO L226 Difference]: Without dead ends: 62 [2022-04-06 20:00:12,747 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=346, Invalid=776, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 20:00:12,749 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 85 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:00:12,749 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 50 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:00:12,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-04-06 20:00:12,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2022-04-06 20:00:12,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.18) internal successors, (59), 50 states have internal predecessors, (59), 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) [2022-04-06 20:00:12,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2022-04-06 20:00:12,762 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 31 [2022-04-06 20:00:12,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:00:12,762 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2022-04-06 20:00:12,762 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:00:12,762 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2022-04-06 20:00:12,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 20:00:12,763 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:00:12,763 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:00:12,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 20:00:12,985 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:00:12,985 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:00:12,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:00:12,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1512030703, now seen corresponding path program 15 times [2022-04-06 20:00:12,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:00:12,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1154898264] [2022-04-06 20:00:12,987 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:00:12,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1512030703, now seen corresponding path program 16 times [2022-04-06 20:00:12,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:00:12,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161554755] [2022-04-06 20:00:12,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:00:12,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:00:13,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:00:13,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:00:13,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:00:13,075 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:13,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:00:13,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161554755] [2022-04-06 20:00:13,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161554755] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:00:13,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941071391] [2022-04-06 20:00:13,076 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:00:13,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:00:13,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:00:13,084 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:00:13,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 20:00:13,119 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:00:13,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:00:13,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 20:00:13,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:00:13,195 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:13,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:00:13,361 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:13,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941071391] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:00:13,361 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:00:13,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-04-06 20:00:13,361 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:00:13,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1154898264] [2022-04-06 20:00:13,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1154898264] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:00:13,362 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:00:13,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 20:00:13,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114248489] [2022-04-06 20:00:13,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:00:13,362 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 20:00:13,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:00:13,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 20:00:13,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=428, Unknown=0, NotChecked=0, Total=650 [2022-04-06 20:00:13,363 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:00:13,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:00:13,512 INFO L93 Difference]: Finished difference Result 73 states and 83 transitions. [2022-04-06 20:00:13,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 20:00:13,512 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 2 states have call successors, (3), 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 33 [2022-04-06 20:00:13,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:00:13,512 INFO L225 Difference]: With dead ends: 73 [2022-04-06 20:00:13,512 INFO L226 Difference]: Without dead ends: 67 [2022-04-06 20:00:13,513 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=422, Invalid=910, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 20:00:13,514 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 107 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:00:13,514 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 40 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:00:13,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-04-06 20:00:13,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 60. [2022-04-06 20:00:13,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.1818181818181819) internal successors, (65), 55 states have internal predecessors, (65), 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) [2022-04-06 20:00:13,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 69 transitions. [2022-04-06 20:00:13,521 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 69 transitions. Word has length 33 [2022-04-06 20:00:13,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:00:13,522 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 69 transitions. [2022-04-06 20:00:13,522 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:00:13,522 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 69 transitions. [2022-04-06 20:00:13,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-04-06 20:00:13,522 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:00:13,522 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:00:13,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 20:00:13,738 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-04-06 20:00:13,739 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:00:13,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:00:13,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1721055348, now seen corresponding path program 17 times [2022-04-06 20:00:13,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:00:13,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [729498472] [2022-04-06 20:00:13,740 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:00:13,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1721055348, now seen corresponding path program 18 times [2022-04-06 20:00:13,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:00:13,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711511768] [2022-04-06 20:00:13,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:00:13,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:00:13,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:00:13,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:00:13,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:00:13,841 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:13,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:00:13,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711511768] [2022-04-06 20:00:13,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711511768] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:00:13,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388699236] [2022-04-06 20:00:13,842 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:00:13,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:00:13,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:00:13,842 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:00:13,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 20:00:13,884 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-04-06 20:00:13,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:00:13,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 20:00:13,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:00:13,954 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:13,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:00:14,147 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:14,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388699236] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:00:14,148 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:00:14,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 28 [2022-04-06 20:00:14,148 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:00:14,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [729498472] [2022-04-06 20:00:14,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [729498472] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:00:14,148 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:00:14,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 20:00:14,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592120934] [2022-04-06 20:00:14,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:00:14,148 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 20:00:14,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:00:14,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 20:00:14,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=491, Unknown=0, NotChecked=0, Total=756 [2022-04-06 20:00:14,149 INFO L87 Difference]: Start difference. First operand 60 states and 69 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:00:14,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:00:14,316 INFO L93 Difference]: Finished difference Result 78 states and 89 transitions. [2022-04-06 20:00:14,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 20:00:14,316 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 2 states have call successors, (3), 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 35 [2022-04-06 20:00:14,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:00:14,317 INFO L225 Difference]: With dead ends: 78 [2022-04-06 20:00:14,317 INFO L226 Difference]: Without dead ends: 72 [2022-04-06 20:00:14,317 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=506, Invalid=1054, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 20:00:14,318 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 126 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:00:14,318 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 40 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:00:14,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-04-06 20:00:14,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 65. [2022-04-06 20:00:14,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 60 states have internal predecessors, (71), 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) [2022-04-06 20:00:14,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 75 transitions. [2022-04-06 20:00:14,326 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 75 transitions. Word has length 35 [2022-04-06 20:00:14,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:00:14,327 INFO L478 AbstractCegarLoop]: Abstraction has 65 states and 75 transitions. [2022-04-06 20:00:14,327 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:00:14,327 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 75 transitions. [2022-04-06 20:00:14,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-06 20:00:14,327 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:00:14,327 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:00:14,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 20:00:14,551 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:00:14,551 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:00:14,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:00:14,552 INFO L85 PathProgramCache]: Analyzing trace with hash -730276281, now seen corresponding path program 19 times [2022-04-06 20:00:14,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:00:14,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1752323262] [2022-04-06 20:00:14,552 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:00:14,552 INFO L85 PathProgramCache]: Analyzing trace with hash -730276281, now seen corresponding path program 20 times [2022-04-06 20:00:14,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:00:14,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722855224] [2022-04-06 20:00:14,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:00:14,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:00:14,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:00:14,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:00:14,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:00:14,632 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:14,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:00:14,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722855224] [2022-04-06 20:00:14,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722855224] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:00:14,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492292123] [2022-04-06 20:00:14,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:00:14,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:00:14,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:00:14,648 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:00:14,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 20:00:14,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:00:14,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:00:14,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 20:00:14,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:00:14,787 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:14,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:00:15,013 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:15,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492292123] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:00:15,013 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:00:15,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 30 [2022-04-06 20:00:15,013 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:00:15,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1752323262] [2022-04-06 20:00:15,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1752323262] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:00:15,014 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:00:15,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 20:00:15,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015063275] [2022-04-06 20:00:15,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:00:15,014 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 20:00:15,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:00:15,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 20:00:15,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=558, Unknown=0, NotChecked=0, Total=870 [2022-04-06 20:00:15,015 INFO L87 Difference]: Start difference. First operand 65 states and 75 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 14 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:00:15,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:00:15,229 INFO L93 Difference]: Finished difference Result 83 states and 95 transitions. [2022-04-06 20:00:15,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 20:00:15,229 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 14 states have internal predecessors, (33), 2 states have call successors, (3), 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 37 [2022-04-06 20:00:15,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:00:15,230 INFO L225 Difference]: With dead ends: 83 [2022-04-06 20:00:15,230 INFO L226 Difference]: Without dead ends: 77 [2022-04-06 20:00:15,231 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=598, Invalid=1208, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 20:00:15,232 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 139 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:00:15,232 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 35 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:00:15,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-04-06 20:00:15,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 70. [2022-04-06 20:00:15,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 65 states have (on average 1.1846153846153846) internal successors, (77), 65 states have internal predecessors, (77), 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) [2022-04-06 20:00:15,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 81 transitions. [2022-04-06 20:00:15,250 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 81 transitions. Word has length 37 [2022-04-06 20:00:15,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:00:15,250 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 81 transitions. [2022-04-06 20:00:15,250 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 14 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:00:15,250 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 81 transitions. [2022-04-06 20:00:15,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 20:00:15,251 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:00:15,251 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:00:15,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-06 20:00:15,471 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-04-06 20:00:15,471 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:00:15,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:00:15,472 INFO L85 PathProgramCache]: Analyzing trace with hash -2074332606, now seen corresponding path program 21 times [2022-04-06 20:00:15,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:00:15,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [956609634] [2022-04-06 20:00:15,472 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:00:15,472 INFO L85 PathProgramCache]: Analyzing trace with hash -2074332606, now seen corresponding path program 22 times [2022-04-06 20:00:15,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:00:15,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694172252] [2022-04-06 20:00:15,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:00:15,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:00:15,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:00:15,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:00:15,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:00:15,573 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:15,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:00:15,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694172252] [2022-04-06 20:00:15,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694172252] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:00:15,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299530364] [2022-04-06 20:00:15,573 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:00:15,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:00:15,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:00:15,588 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:00:15,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 20:00:15,621 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:00:15,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:00:15,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 20:00:15,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:00:15,711 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:15,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:00:15,966 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:15,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299530364] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:00:15,966 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:00:15,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 32 [2022-04-06 20:00:15,966 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:00:15,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [956609634] [2022-04-06 20:00:15,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [956609634] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:00:15,966 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:00:15,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 20:00:15,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551622070] [2022-04-06 20:00:15,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:00:15,967 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 20:00:15,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:00:15,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 20:00:15,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=629, Unknown=0, NotChecked=0, Total=992 [2022-04-06 20:00:15,968 INFO L87 Difference]: Start difference. First operand 70 states and 81 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 15 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:00:16,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:00:16,185 INFO L93 Difference]: Finished difference Result 88 states and 101 transitions. [2022-04-06 20:00:16,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 20:00:16,186 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 15 states have internal predecessors, (35), 2 states have call successors, (3), 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 39 [2022-04-06 20:00:16,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:00:16,186 INFO L225 Difference]: With dead ends: 88 [2022-04-06 20:00:16,186 INFO L226 Difference]: Without dead ends: 82 [2022-04-06 20:00:16,187 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=698, Invalid=1372, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 20:00:16,188 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 152 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:00:16,188 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 40 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:00:16,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-04-06 20:00:16,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 75. [2022-04-06 20:00:16,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.1857142857142857) internal successors, (83), 70 states have internal predecessors, (83), 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) [2022-04-06 20:00:16,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 87 transitions. [2022-04-06 20:00:16,196 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 87 transitions. Word has length 39 [2022-04-06 20:00:16,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:00:16,196 INFO L478 AbstractCegarLoop]: Abstraction has 75 states and 87 transitions. [2022-04-06 20:00:16,196 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 15 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:00:16,196 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 87 transitions. [2022-04-06 20:00:16,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 20:00:16,197 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:00:16,197 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:00:16,216 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-04-06 20:00:16,411 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-04-06 20:00:16,412 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:00:16,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:00:16,412 INFO L85 PathProgramCache]: Analyzing trace with hash -927304835, now seen corresponding path program 23 times [2022-04-06 20:00:16,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:00:16,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [426735330] [2022-04-06 20:00:16,412 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:00:16,413 INFO L85 PathProgramCache]: Analyzing trace with hash -927304835, now seen corresponding path program 24 times [2022-04-06 20:00:16,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:00:16,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194003484] [2022-04-06 20:00:16,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:00:16,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:00:16,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:00:16,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:00:16,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:00:16,564 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:16,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:00:16,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194003484] [2022-04-06 20:00:16,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194003484] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:00:16,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113819368] [2022-04-06 20:00:16,564 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:00:16,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:00:16,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:00:16,565 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:00:16,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-06 20:00:16,628 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-04-06 20:00:16,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:00:16,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-06 20:00:16,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:00:16,700 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:16,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:00:16,961 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:16,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113819368] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:00:16,962 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:00:16,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 34 [2022-04-06 20:00:16,962 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:00:16,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [426735330] [2022-04-06 20:00:16,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [426735330] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:00:16,962 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:00:16,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 20:00:16,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426323809] [2022-04-06 20:00:16,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:00:16,962 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 20:00:16,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:00:16,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 20:00:16,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=418, Invalid=704, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 20:00:16,963 INFO L87 Difference]: Start difference. First operand 75 states and 87 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 16 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:00:17,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:00:17,208 INFO L93 Difference]: Finished difference Result 93 states and 107 transitions. [2022-04-06 20:00:17,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 20:00:17,208 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 16 states have internal predecessors, (37), 2 states have call successors, (3), 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 41 [2022-04-06 20:00:17,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:00:17,209 INFO L225 Difference]: With dead ends: 93 [2022-04-06 20:00:17,209 INFO L226 Difference]: Without dead ends: 87 [2022-04-06 20:00:17,209 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=806, Invalid=1546, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 20:00:17,210 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 177 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:00:17,210 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 40 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:00:17,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-04-06 20:00:17,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 80. [2022-04-06 20:00:17,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 75 states have (on average 1.1866666666666668) internal successors, (89), 75 states have internal predecessors, (89), 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) [2022-04-06 20:00:17,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 93 transitions. [2022-04-06 20:00:17,219 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 93 transitions. Word has length 41 [2022-04-06 20:00:17,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:00:17,219 INFO L478 AbstractCegarLoop]: Abstraction has 80 states and 93 transitions. [2022-04-06 20:00:17,220 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 16 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:00:17,220 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 93 transitions. [2022-04-06 20:00:17,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-06 20:00:17,220 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:00:17,220 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:00:17,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-06 20:00:17,436 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-04-06 20:00:17,437 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:00:17,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:00:17,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1854755320, now seen corresponding path program 25 times [2022-04-06 20:00:17,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:00:17,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [769359274] [2022-04-06 20:00:17,437 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:00:17,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1854755320, now seen corresponding path program 26 times [2022-04-06 20:00:17,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:00:17,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959912766] [2022-04-06 20:00:17,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:00:17,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:00:17,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:00:17,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:00:17,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:00:17,567 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:17,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:00:17,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959912766] [2022-04-06 20:00:17,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959912766] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:00:17,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251908092] [2022-04-06 20:00:17,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:00:17,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:00:17,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:00:17,568 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:00:17,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-06 20:00:17,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:00:17,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:00:17,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-06 20:00:17,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:00:17,706 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:17,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:00:17,961 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:17,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251908092] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:00:17,962 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:00:17,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 36 [2022-04-06 20:00:17,962 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:00:17,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [769359274] [2022-04-06 20:00:17,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [769359274] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:00:17,962 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:00:17,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 20:00:17,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552038292] [2022-04-06 20:00:17,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:00:17,962 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 20:00:17,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:00:17,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 20:00:17,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=477, Invalid=783, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 20:00:17,963 INFO L87 Difference]: Start difference. First operand 80 states and 93 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 17 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:00:18,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:00:18,170 INFO L93 Difference]: Finished difference Result 98 states and 113 transitions. [2022-04-06 20:00:18,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 20:00:18,170 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 17 states have internal predecessors, (39), 2 states have call successors, (3), 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 43 [2022-04-06 20:00:18,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:00:18,170 INFO L225 Difference]: With dead ends: 98 [2022-04-06 20:00:18,170 INFO L226 Difference]: Without dead ends: 92 [2022-04-06 20:00:18,172 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=922, Invalid=1730, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 20:00:18,179 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 172 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:00:18,179 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 40 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:00:18,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-04-06 20:00:18,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 85. [2022-04-06 20:00:18,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.1875) internal successors, (95), 80 states have internal predecessors, (95), 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) [2022-04-06 20:00:18,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2022-04-06 20:00:18,203 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 43 [2022-04-06 20:00:18,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:00:18,203 INFO L478 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2022-04-06 20:00:18,203 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 17 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:00:18,203 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2022-04-06 20:00:18,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-06 20:00:18,203 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:00:18,204 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:00:18,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-06 20:00:18,427 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-04-06 20:00:18,428 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:00:18,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:00:18,428 INFO L85 PathProgramCache]: Analyzing trace with hash -350061133, now seen corresponding path program 27 times [2022-04-06 20:00:18,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:00:18,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [455232582] [2022-04-06 20:00:18,429 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:00:18,429 INFO L85 PathProgramCache]: Analyzing trace with hash -350061133, now seen corresponding path program 28 times [2022-04-06 20:00:18,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:00:18,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014417837] [2022-04-06 20:00:18,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:00:18,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:00:18,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:00:18,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:00:18,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:00:18,584 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:18,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:00:18,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014417837] [2022-04-06 20:00:18,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014417837] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:00:18,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685784965] [2022-04-06 20:00:18,585 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:00:18,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:00:18,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:00:18,586 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:00:18,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-06 20:00:18,622 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:00:18,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:00:18,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 20:00:18,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:00:18,715 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:18,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:00:19,065 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:19,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685784965] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:00:19,066 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:00:19,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 38 [2022-04-06 20:00:19,066 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:00:19,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [455232582] [2022-04-06 20:00:19,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [455232582] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:00:19,066 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:00:19,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 20:00:19,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026858918] [2022-04-06 20:00:19,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:00:19,067 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 20:00:19,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:00:19,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 20:00:19,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=540, Invalid=866, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 20:00:19,068 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 18 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:00:19,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:00:19,357 INFO L93 Difference]: Finished difference Result 103 states and 119 transitions. [2022-04-06 20:00:19,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 20:00:19,358 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 18 states have internal predecessors, (41), 2 states have call successors, (3), 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 45 [2022-04-06 20:00:19,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:00:19,358 INFO L225 Difference]: With dead ends: 103 [2022-04-06 20:00:19,358 INFO L226 Difference]: Without dead ends: 97 [2022-04-06 20:00:19,359 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1046, Invalid=1924, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 20:00:19,360 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 200 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:00:19,360 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 40 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:00:19,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-04-06 20:00:19,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 90. [2022-04-06 20:00:19,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 85 states have (on average 1.188235294117647) internal successors, (101), 85 states have internal predecessors, (101), 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) [2022-04-06 20:00:19,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 105 transitions. [2022-04-06 20:00:19,370 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 105 transitions. Word has length 45 [2022-04-06 20:00:19,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:00:19,370 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 105 transitions. [2022-04-06 20:00:19,370 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 18 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:00:19,370 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 105 transitions. [2022-04-06 20:00:19,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 20:00:19,371 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:00:19,371 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:00:19,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-04-06 20:00:19,574 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:00:19,575 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:00:19,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:00:19,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1759795538, now seen corresponding path program 29 times [2022-04-06 20:00:19,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:00:19,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1462926962] [2022-04-06 20:00:19,576 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:00:19,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1759795538, now seen corresponding path program 30 times [2022-04-06 20:00:19,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:00:19,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123433078] [2022-04-06 20:00:19,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:00:19,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:00:19,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:00:19,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:00:19,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:00:19,745 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:19,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:00:19,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123433078] [2022-04-06 20:00:19,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123433078] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:00:19,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762401326] [2022-04-06 20:00:19,745 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:00:19,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:00:19,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:00:19,746 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:00:19,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-06 20:00:19,786 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-04-06 20:00:19,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:00:19,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 20:00:19,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:00:19,886 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:19,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:00:20,243 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:20,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762401326] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:00:20,243 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:00:20,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 40 [2022-04-06 20:00:20,243 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:00:20,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1462926962] [2022-04-06 20:00:20,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1462926962] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:00:20,243 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:00:20,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 20:00:20,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861660630] [2022-04-06 20:00:20,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:00:20,244 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 20:00:20,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:00:20,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 20:00:20,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=607, Invalid=953, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 20:00:20,245 INFO L87 Difference]: Start difference. First operand 90 states and 105 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 19 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:00:20,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:00:20,552 INFO L93 Difference]: Finished difference Result 108 states and 125 transitions. [2022-04-06 20:00:20,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 20:00:20,552 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 19 states have internal predecessors, (43), 2 states have call successors, (3), 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 47 [2022-04-06 20:00:20,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:00:20,552 INFO L225 Difference]: With dead ends: 108 [2022-04-06 20:00:20,552 INFO L226 Difference]: Without dead ends: 102 [2022-04-06 20:00:20,553 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1178, Invalid=2128, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 20:00:20,554 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 171 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:00:20,554 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 55 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:00:20,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-04-06 20:00:20,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 95. [2022-04-06 20:00:20,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.1888888888888889) internal successors, (107), 90 states have internal predecessors, (107), 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) [2022-04-06 20:00:20,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 111 transitions. [2022-04-06 20:00:20,565 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 111 transitions. Word has length 47 [2022-04-06 20:00:20,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:00:20,565 INFO L478 AbstractCegarLoop]: Abstraction has 95 states and 111 transitions. [2022-04-06 20:00:20,565 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 19 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:00:20,565 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 111 transitions. [2022-04-06 20:00:20,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-06 20:00:20,566 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:00:20,566 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:00:20,595 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-04-06 20:00:20,799 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-04-06 20:00:20,800 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:00:20,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:00:20,800 INFO L85 PathProgramCache]: Analyzing trace with hash 695106793, now seen corresponding path program 31 times [2022-04-06 20:00:20,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:00:20,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [328314809] [2022-04-06 20:00:20,801 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:00:20,801 INFO L85 PathProgramCache]: Analyzing trace with hash 695106793, now seen corresponding path program 32 times [2022-04-06 20:00:20,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:00:20,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200295907] [2022-04-06 20:00:20,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:00:20,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:00:20,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:00:21,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:00:21,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:00:21,024 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:21,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:00:21,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200295907] [2022-04-06 20:00:21,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200295907] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:00:21,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869381175] [2022-04-06 20:00:21,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:00:21,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:00:21,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:00:21,026 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:00:21,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-06 20:00:21,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:00:21,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:00:21,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-06 20:00:21,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:00:21,184 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:21,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:00:21,672 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:21,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869381175] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:00:21,672 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:00:21,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 42 [2022-04-06 20:00:21,672 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:00:21,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [328314809] [2022-04-06 20:00:21,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [328314809] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:00:21,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:00:21,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 20:00:21,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968094271] [2022-04-06 20:00:21,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:00:21,673 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 20:00:21,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:00:21,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 20:00:21,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=678, Invalid=1044, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 20:00:21,674 INFO L87 Difference]: Start difference. First operand 95 states and 111 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 20 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:00:21,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:00:21,998 INFO L93 Difference]: Finished difference Result 113 states and 131 transitions. [2022-04-06 20:00:21,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 20:00:21,998 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 20 states have internal predecessors, (45), 2 states have call successors, (3), 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 49 [2022-04-06 20:00:21,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:00:21,999 INFO L225 Difference]: With dead ends: 113 [2022-04-06 20:00:21,999 INFO L226 Difference]: Without dead ends: 107 [2022-04-06 20:00:22,000 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1318, Invalid=2342, Unknown=0, NotChecked=0, Total=3660 [2022-04-06 20:00:22,000 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 196 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:00:22,000 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 50 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:00:22,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-04-06 20:00:22,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 100. [2022-04-06 20:00:22,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 95 states have (on average 1.1894736842105262) internal successors, (113), 95 states have internal predecessors, (113), 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) [2022-04-06 20:00:22,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 117 transitions. [2022-04-06 20:00:22,013 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 117 transitions. Word has length 49 [2022-04-06 20:00:22,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:00:22,013 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 117 transitions. [2022-04-06 20:00:22,013 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 20 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:00:22,014 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 117 transitions. [2022-04-06 20:00:22,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 20:00:22,014 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:00:22,014 INFO L499 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:00:22,030 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-04-06 20:00:22,227 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-04-06 20:00:22,227 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:00:22,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:00:22,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1919201380, now seen corresponding path program 33 times [2022-04-06 20:00:22,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:00:22,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [429269330] [2022-04-06 20:00:22,228 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:00:22,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1919201380, now seen corresponding path program 34 times [2022-04-06 20:00:22,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:00:22,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95124098] [2022-04-06 20:00:22,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:00:22,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:00:22,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:00:22,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:00:22,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:00:22,401 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:22,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:00:22,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95124098] [2022-04-06 20:00:22,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95124098] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:00:22,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342234713] [2022-04-06 20:00:22,401 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:00:22,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:00:22,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:00:22,406 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:00:22,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-04-06 20:00:22,442 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:00:22,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:00:22,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-06 20:00:22,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:00:22,542 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:22,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:00:22,963 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:22,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342234713] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:00:22,964 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:00:22,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 44 [2022-04-06 20:00:22,964 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:00:22,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [429269330] [2022-04-06 20:00:22,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [429269330] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:00:22,964 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:00:22,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 20:00:22,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538243044] [2022-04-06 20:00:22,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:00:22,964 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 20:00:22,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:00:22,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 20:00:22,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=753, Invalid=1139, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 20:00:22,965 INFO L87 Difference]: Start difference. First operand 100 states and 117 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 21 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:00:23,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:00:23,208 INFO L93 Difference]: Finished difference Result 118 states and 137 transitions. [2022-04-06 20:00:23,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 20:00:23,208 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 21 states have internal predecessors, (47), 2 states have call successors, (3), 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 51 [2022-04-06 20:00:23,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:00:23,209 INFO L225 Difference]: With dead ends: 118 [2022-04-06 20:00:23,209 INFO L226 Difference]: Without dead ends: 112 [2022-04-06 20:00:23,210 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1466, Invalid=2566, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 20:00:23,211 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 212 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:00:23,211 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 45 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:00:23,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-04-06 20:00:23,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 105. [2022-04-06 20:00:23,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.19) internal successors, (119), 100 states have internal predecessors, (119), 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) [2022-04-06 20:00:23,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 123 transitions. [2022-04-06 20:00:23,234 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 123 transitions. Word has length 51 [2022-04-06 20:00:23,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:00:23,235 INFO L478 AbstractCegarLoop]: Abstraction has 105 states and 123 transitions. [2022-04-06 20:00:23,235 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 21 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:00:23,235 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 123 transitions. [2022-04-06 20:00:23,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-06 20:00:23,236 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:00:23,236 INFO L499 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:00:23,251 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-04-06 20:00:23,450 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:00:23,450 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:00:23,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:00:23,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1453060383, now seen corresponding path program 35 times [2022-04-06 20:00:23,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:00:23,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1298424184] [2022-04-06 20:00:23,451 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:00:23,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1453060383, now seen corresponding path program 36 times [2022-04-06 20:00:23,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:00:23,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011275768] [2022-04-06 20:00:23,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:00:23,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:00:23,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:00:23,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:00:23,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:00:23,634 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:23,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:00:23,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011275768] [2022-04-06 20:00:23,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011275768] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:00:23,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976627704] [2022-04-06 20:00:23,634 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:00:23,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:00:23,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:00:23,635 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:00:23,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-04-06 20:00:23,678 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-04-06 20:00:23,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:00:23,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-06 20:00:23,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:00:23,773 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:23,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:00:24,265 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:24,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976627704] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:00:24,266 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:00:24,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 46 [2022-04-06 20:00:24,266 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:00:24,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1298424184] [2022-04-06 20:00:24,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1298424184] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:00:24,266 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:00:24,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 20:00:24,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333699216] [2022-04-06 20:00:24,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:00:24,267 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 20:00:24,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:00:24,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 20:00:24,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=832, Invalid=1238, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 20:00:24,268 INFO L87 Difference]: Start difference. First operand 105 states and 123 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 22 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:00:24,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:00:24,638 INFO L93 Difference]: Finished difference Result 123 states and 143 transitions. [2022-04-06 20:00:24,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 20:00:24,638 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 22 states have internal predecessors, (49), 2 states have call successors, (3), 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 53 [2022-04-06 20:00:24,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:00:24,639 INFO L225 Difference]: With dead ends: 123 [2022-04-06 20:00:24,639 INFO L226 Difference]: Without dead ends: 117 [2022-04-06 20:00:24,640 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1622, Invalid=2800, Unknown=0, NotChecked=0, Total=4422 [2022-04-06 20:00:24,641 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 252 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:00:24,641 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 35 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:00:24,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-04-06 20:00:24,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 110. [2022-04-06 20:00:24,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 105 states have (on average 1.1904761904761905) internal successors, (125), 105 states have internal predecessors, (125), 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) [2022-04-06 20:00:24,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 129 transitions. [2022-04-06 20:00:24,656 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 129 transitions. Word has length 53 [2022-04-06 20:00:24,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:00:24,656 INFO L478 AbstractCegarLoop]: Abstraction has 110 states and 129 transitions. [2022-04-06 20:00:24,656 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 22 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:00:24,657 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 129 transitions. [2022-04-06 20:00:24,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 20:00:24,657 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:00:24,657 INFO L499 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:00:24,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-04-06 20:00:24,873 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:00:24,873 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:00:24,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:00:24,874 INFO L85 PathProgramCache]: Analyzing trace with hash 168161050, now seen corresponding path program 37 times [2022-04-06 20:00:24,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:00:24,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [871108714] [2022-04-06 20:00:24,874 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:00:24,874 INFO L85 PathProgramCache]: Analyzing trace with hash 168161050, now seen corresponding path program 38 times [2022-04-06 20:00:24,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:00:24,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717537295] [2022-04-06 20:00:24,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:00:24,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:00:24,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:00:25,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:00:25,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:00:25,105 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:25,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:00:25,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717537295] [2022-04-06 20:00:25,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717537295] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:00:25,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801086568] [2022-04-06 20:00:25,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:00:25,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:00:25,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:00:25,106 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:00:25,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-04-06 20:00:25,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:00:25,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:00:25,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 20:00:25,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:00:25,235 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:25,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:00:25,747 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:25,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801086568] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:00:25,747 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:00:25,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 48 [2022-04-06 20:00:25,747 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:00:25,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [871108714] [2022-04-06 20:00:25,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [871108714] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:00:25,748 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:00:25,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 20:00:25,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634969091] [2022-04-06 20:00:25,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:00:25,748 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 20:00:25,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:00:25,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 20:00:25,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=915, Invalid=1341, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 20:00:25,749 INFO L87 Difference]: Start difference. First operand 110 states and 129 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 23 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:00:26,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:00:26,087 INFO L93 Difference]: Finished difference Result 128 states and 149 transitions. [2022-04-06 20:00:26,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 20:00:26,087 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 23 states have internal predecessors, (51), 2 states have call successors, (3), 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 55 [2022-04-06 20:00:26,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:00:26,088 INFO L225 Difference]: With dead ends: 128 [2022-04-06 20:00:26,088 INFO L226 Difference]: Without dead ends: 122 [2022-04-06 20:00:26,089 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1786, Invalid=3044, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 20:00:26,098 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 247 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:00:26,099 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 40 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:00:26,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-04-06 20:00:26,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 115. [2022-04-06 20:00:26,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.190909090909091) internal successors, (131), 110 states have internal predecessors, (131), 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) [2022-04-06 20:00:26,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 135 transitions. [2022-04-06 20:00:26,119 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 135 transitions. Word has length 55 [2022-04-06 20:00:26,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:00:26,119 INFO L478 AbstractCegarLoop]: Abstraction has 115 states and 135 transitions. [2022-04-06 20:00:26,119 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 23 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:00:26,119 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 135 transitions. [2022-04-06 20:00:26,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-04-06 20:00:26,119 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:00:26,119 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:00:26,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-04-06 20:00:26,334 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:00:26,334 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:00:26,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:00:26,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1964484011, now seen corresponding path program 39 times [2022-04-06 20:00:26,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:00:26,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [617251986] [2022-04-06 20:00:26,336 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:00:26,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1964484011, now seen corresponding path program 40 times [2022-04-06 20:00:26,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:00:26,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463031237] [2022-04-06 20:00:26,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:00:26,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:00:26,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:00:26,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:00:26,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:00:26,510 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:26,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:00:26,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463031237] [2022-04-06 20:00:26,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463031237] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:00:26,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689050432] [2022-04-06 20:00:26,511 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:00:26,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:00:26,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:00:26,511 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:00:26,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-04-06 20:00:26,556 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:00:26,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:00:26,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-06 20:00:26,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:00:26,651 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:26,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:00:27,235 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:27,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689050432] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:00:27,235 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:00:27,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-04-06 20:00:27,235 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:00:27,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [617251986] [2022-04-06 20:00:27,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [617251986] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:00:27,235 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:00:27,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 20:00:27,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431944530] [2022-04-06 20:00:27,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:00:27,236 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 20:00:27,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:00:27,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 20:00:27,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1002, Invalid=1448, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 20:00:27,237 INFO L87 Difference]: Start difference. First operand 115 states and 135 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 24 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:00:27,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:00:27,746 INFO L93 Difference]: Finished difference Result 133 states and 155 transitions. [2022-04-06 20:00:27,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-06 20:00:27,748 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 24 states have internal predecessors, (53), 2 states have call successors, (3), 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 57 [2022-04-06 20:00:27,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:00:27,748 INFO L225 Difference]: With dead ends: 133 [2022-04-06 20:00:27,748 INFO L226 Difference]: Without dead ends: 127 [2022-04-06 20:00:27,750 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1958, Invalid=3298, Unknown=0, NotChecked=0, Total=5256 [2022-04-06 20:00:27,750 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 269 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:00:27,750 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 40 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:00:27,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-04-06 20:00:27,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 120. [2022-04-06 20:00:27,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 115 states have (on average 1.191304347826087) internal successors, (137), 115 states have internal predecessors, (137), 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) [2022-04-06 20:00:27,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 141 transitions. [2022-04-06 20:00:27,768 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 141 transitions. Word has length 57 [2022-04-06 20:00:27,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:00:27,768 INFO L478 AbstractCegarLoop]: Abstraction has 120 states and 141 transitions. [2022-04-06 20:00:27,768 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 24 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:00:27,768 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 141 transitions. [2022-04-06 20:00:27,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 20:00:27,769 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:00:27,769 INFO L499 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:00:27,785 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-04-06 20:00:27,986 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-04-06 20:00:27,986 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:00:27,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:00:27,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1557979856, now seen corresponding path program 41 times [2022-04-06 20:00:27,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:00:27,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2074238256] [2022-04-06 20:00:27,987 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:00:27,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1557979856, now seen corresponding path program 42 times [2022-04-06 20:00:27,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:00:27,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889106628] [2022-04-06 20:00:27,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:00:27,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:00:27,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:00:28,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:00:28,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:00:28,240 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:28,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:00:28,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889106628] [2022-04-06 20:00:28,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889106628] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:00:28,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185893780] [2022-04-06 20:00:28,240 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:00:28,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:00:28,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:00:28,241 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:00:28,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-04-06 20:00:28,289 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2022-04-06 20:00:28,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:00:28,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-06 20:00:28,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:00:28,418 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:28,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:00:29,014 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:29,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185893780] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:00:29,015 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:00:29,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 52 [2022-04-06 20:00:29,015 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:00:29,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2074238256] [2022-04-06 20:00:29,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2074238256] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:00:29,015 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:00:29,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 20:00:29,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103596194] [2022-04-06 20:00:29,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:00:29,016 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 20:00:29,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:00:29,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 20:00:29,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1093, Invalid=1559, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 20:00:29,017 INFO L87 Difference]: Start difference. First operand 120 states and 141 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 25 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:00:29,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:00:29,487 INFO L93 Difference]: Finished difference Result 138 states and 161 transitions. [2022-04-06 20:00:29,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-06 20:00:29,488 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 25 states have internal predecessors, (55), 2 states have call successors, (3), 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 59 [2022-04-06 20:00:29,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:00:29,488 INFO L225 Difference]: With dead ends: 138 [2022-04-06 20:00:29,488 INFO L226 Difference]: Without dead ends: 132 [2022-04-06 20:00:29,489 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2138, Invalid=3562, Unknown=0, NotChecked=0, Total=5700 [2022-04-06 20:00:29,489 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 321 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:00:29,489 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 40 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:00:29,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-04-06 20:00:29,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 125. [2022-04-06 20:00:29,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.1916666666666667) internal successors, (143), 120 states have internal predecessors, (143), 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) [2022-04-06 20:00:29,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 147 transitions. [2022-04-06 20:00:29,509 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 147 transitions. Word has length 59 [2022-04-06 20:00:29,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:00:29,509 INFO L478 AbstractCegarLoop]: Abstraction has 125 states and 147 transitions. [2022-04-06 20:00:29,509 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 25 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:00:29,509 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 147 transitions. [2022-04-06 20:00:29,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-06 20:00:29,509 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:00:29,510 INFO L499 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:00:29,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-04-06 20:00:29,726 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-04-06 20:00:29,726 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:00:29,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:00:29,726 INFO L85 PathProgramCache]: Analyzing trace with hash -2083440501, now seen corresponding path program 43 times [2022-04-06 20:00:29,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:00:29,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1210925565] [2022-04-06 20:00:29,727 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:00:29,727 INFO L85 PathProgramCache]: Analyzing trace with hash -2083440501, now seen corresponding path program 44 times [2022-04-06 20:00:29,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:00:29,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629198782] [2022-04-06 20:00:29,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:00:29,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:00:29,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:00:29,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:00:29,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:00:29,919 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:29,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:00:29,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629198782] [2022-04-06 20:00:29,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629198782] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:00:29,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940242663] [2022-04-06 20:00:29,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:00:29,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:00:29,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:00:29,921 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:00:29,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-04-06 20:00:29,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:00:29,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:00:29,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-06 20:00:29,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:00:30,108 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:30,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:00:30,650 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:30,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940242663] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:00:30,651 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:00:30,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 54 [2022-04-06 20:00:30,651 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:00:30,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1210925565] [2022-04-06 20:00:30,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1210925565] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:00:30,651 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:00:30,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-04-06 20:00:30,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507413176] [2022-04-06 20:00:30,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:00:30,651 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-04-06 20:00:30,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:00:30,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-04-06 20:00:30,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1188, Invalid=1674, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 20:00:30,652 INFO L87 Difference]: Start difference. First operand 125 states and 147 transitions. Second operand has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 26 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:00:31,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:00:31,026 INFO L93 Difference]: Finished difference Result 143 states and 167 transitions. [2022-04-06 20:00:31,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-06 20:00:31,026 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 26 states have internal predecessors, (57), 2 states have call successors, (3), 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 61 [2022-04-06 20:00:31,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:00:31,028 INFO L225 Difference]: With dead ends: 143 [2022-04-06 20:00:31,029 INFO L226 Difference]: Without dead ends: 137 [2022-04-06 20:00:31,029 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2326, Invalid=3836, Unknown=0, NotChecked=0, Total=6162 [2022-04-06 20:00:31,030 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 343 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:00:31,030 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 45 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:00:31,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-04-06 20:00:31,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 130. [2022-04-06 20:00:31,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 125 states have (on average 1.192) internal successors, (149), 125 states have internal predecessors, (149), 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) [2022-04-06 20:00:31,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 153 transitions. [2022-04-06 20:00:31,054 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 153 transitions. Word has length 61 [2022-04-06 20:00:31,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:00:31,054 INFO L478 AbstractCegarLoop]: Abstraction has 130 states and 153 transitions. [2022-04-06 20:00:31,054 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 26 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:00:31,054 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 153 transitions. [2022-04-06 20:00:31,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-06 20:00:31,079 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:00:31,079 INFO L499 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:00:31,095 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-04-06 20:00:31,280 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:00:31,280 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:00:31,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:00:31,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1090057338, now seen corresponding path program 45 times [2022-04-06 20:00:31,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:00:31,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [222148690] [2022-04-06 20:00:31,281 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:00:31,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1090057338, now seen corresponding path program 46 times [2022-04-06 20:00:31,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:00:31,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197519877] [2022-04-06 20:00:31,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:00:31,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:00:31,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:00:31,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:00:31,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:00:31,508 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:31,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:00:31,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197519877] [2022-04-06 20:00:31,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197519877] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:00:31,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193121228] [2022-04-06 20:00:31,509 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:00:31,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:00:31,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:00:31,510 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:00:31,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-04-06 20:00:31,547 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:00:31,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:00:31,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-06 20:00:31,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:00:31,626 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:31,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:00:32,218 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:32,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193121228] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:00:32,218 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:00:32,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 56 [2022-04-06 20:00:32,219 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:00:32,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [222148690] [2022-04-06 20:00:32,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [222148690] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:00:32,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:00:32,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-04-06 20:00:32,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139238264] [2022-04-06 20:00:32,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:00:32,219 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 20:00:32,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:00:32,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 20:00:32,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1287, Invalid=1793, Unknown=0, NotChecked=0, Total=3080 [2022-04-06 20:00:32,220 INFO L87 Difference]: Start difference. First operand 130 states and 153 transitions. Second operand has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 27 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:00:32,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:00:32,749 INFO L93 Difference]: Finished difference Result 148 states and 173 transitions. [2022-04-06 20:00:32,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-06 20:00:32,749 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 27 states have internal predecessors, (59), 2 states have call successors, (3), 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 63 [2022-04-06 20:00:32,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:00:32,750 INFO L225 Difference]: With dead ends: 148 [2022-04-06 20:00:32,750 INFO L226 Difference]: Without dead ends: 142 [2022-04-06 20:00:32,751 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 729 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2522, Invalid=4120, Unknown=0, NotChecked=0, Total=6642 [2022-04-06 20:00:32,751 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 326 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:00:32,751 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 30 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:00:32,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-04-06 20:00:32,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 135. [2022-04-06 20:00:32,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.1923076923076923) internal successors, (155), 130 states have internal predecessors, (155), 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) [2022-04-06 20:00:32,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 159 transitions. [2022-04-06 20:00:32,773 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 159 transitions. Word has length 63 [2022-04-06 20:00:32,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:00:32,774 INFO L478 AbstractCegarLoop]: Abstraction has 135 states and 159 transitions. [2022-04-06 20:00:32,774 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 27 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:00:32,774 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 159 transitions. [2022-04-06 20:00:32,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-04-06 20:00:32,774 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:00:32,774 INFO L499 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:00:32,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-04-06 20:00:32,990 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:00:32,990 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:00:32,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:00:32,991 INFO L85 PathProgramCache]: Analyzing trace with hash 68422593, now seen corresponding path program 47 times [2022-04-06 20:00:32,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:00:32,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [301430799] [2022-04-06 20:00:32,991 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:00:32,991 INFO L85 PathProgramCache]: Analyzing trace with hash 68422593, now seen corresponding path program 48 times [2022-04-06 20:00:32,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:00:32,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133532037] [2022-04-06 20:00:32,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:00:32,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:00:33,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:00:33,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:00:33,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:00:33,270 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:33,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:00:33,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133532037] [2022-04-06 20:00:33,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133532037] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:00:33,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645942696] [2022-04-06 20:00:33,271 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:00:33,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:00:33,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:00:33,271 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:00:33,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-04-06 20:00:33,323 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2022-04-06 20:00:33,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:00:33,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 20:00:33,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:00:33,436 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:33,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:00:34,203 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:34,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645942696] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:00:34,203 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:00:34,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 58 [2022-04-06 20:00:34,204 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:00:34,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [301430799] [2022-04-06 20:00:34,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [301430799] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:00:34,204 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:00:34,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-04-06 20:00:34,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885051638] [2022-04-06 20:00:34,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:00:34,204 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-04-06 20:00:34,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:00:34,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-04-06 20:00:34,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1390, Invalid=1916, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 20:00:34,205 INFO L87 Difference]: Start difference. First operand 135 states and 159 transitions. Second operand has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 28 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:00:34,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:00:34,736 INFO L93 Difference]: Finished difference Result 153 states and 179 transitions. [2022-04-06 20:00:34,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-06 20:00:34,737 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 28 states have internal predecessors, (61), 2 states have call successors, (3), 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 65 [2022-04-06 20:00:34,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:00:34,737 INFO L225 Difference]: With dead ends: 153 [2022-04-06 20:00:34,737 INFO L226 Difference]: Without dead ends: 147 [2022-04-06 20:00:34,738 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 772 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2726, Invalid=4414, Unknown=0, NotChecked=0, Total=7140 [2022-04-06 20:00:34,738 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 330 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:00:34,739 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [330 Valid, 45 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:00:34,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-04-06 20:00:34,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 140. [2022-04-06 20:00:34,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 135 states have (on average 1.1925925925925926) internal successors, (161), 135 states have internal predecessors, (161), 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) [2022-04-06 20:00:34,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 165 transitions. [2022-04-06 20:00:34,762 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 165 transitions. Word has length 65 [2022-04-06 20:00:34,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:00:34,763 INFO L478 AbstractCegarLoop]: Abstraction has 140 states and 165 transitions. [2022-04-06 20:00:34,763 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 28 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:00:34,763 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 165 transitions. [2022-04-06 20:00:34,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-04-06 20:00:34,763 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:00:34,763 INFO L499 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:00:34,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-04-06 20:00:34,970 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-04-06 20:00:34,970 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:00:34,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:00:34,970 INFO L85 PathProgramCache]: Analyzing trace with hash 971106620, now seen corresponding path program 49 times [2022-04-06 20:00:34,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:00:34,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1868710331] [2022-04-06 20:00:34,972 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:00:34,972 INFO L85 PathProgramCache]: Analyzing trace with hash 971106620, now seen corresponding path program 50 times [2022-04-06 20:00:34,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:00:34,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409709767] [2022-04-06 20:00:34,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:00:34,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:00:34,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:00:35,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:00:35,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:00:35,290 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:35,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:00:35,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409709767] [2022-04-06 20:00:35,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409709767] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:00:35,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029069083] [2022-04-06 20:00:35,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:00:35,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:00:35,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:00:35,303 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:00:35,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-04-06 20:00:35,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:00:35,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:00:35,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 29 conjunts are in the unsatisfiable core [2022-04-06 20:00:35,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:00:35,458 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:35,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:00:36,038 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:36,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029069083] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:00:36,038 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:00:36,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 60 [2022-04-06 20:00:36,039 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:00:36,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1868710331] [2022-04-06 20:00:36,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1868710331] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:00:36,039 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:00:36,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-04-06 20:00:36,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308641180] [2022-04-06 20:00:36,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:00:36,039 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-06 20:00:36,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:00:36,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-06 20:00:36,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1497, Invalid=2043, Unknown=0, NotChecked=0, Total=3540 [2022-04-06 20:00:36,060 INFO L87 Difference]: Start difference. First operand 140 states and 165 transitions. Second operand has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 29 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:00:36,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:00:36,619 INFO L93 Difference]: Finished difference Result 158 states and 185 transitions. [2022-04-06 20:00:36,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-06 20:00:36,620 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 29 states have internal predecessors, (63), 2 states have call successors, (3), 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 67 [2022-04-06 20:00:36,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:00:36,621 INFO L225 Difference]: With dead ends: 158 [2022-04-06 20:00:36,621 INFO L226 Difference]: Without dead ends: 152 [2022-04-06 20:00:36,622 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2938, Invalid=4718, Unknown=0, NotChecked=0, Total=7656 [2022-04-06 20:00:36,622 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 337 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:00:36,622 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [337 Valid, 40 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:00:36,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-04-06 20:00:36,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 145. [2022-04-06 20:00:36,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.1928571428571428) internal successors, (167), 140 states have internal predecessors, (167), 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) [2022-04-06 20:00:36,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 171 transitions. [2022-04-06 20:00:36,651 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 171 transitions. Word has length 67 [2022-04-06 20:00:36,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:00:36,651 INFO L478 AbstractCegarLoop]: Abstraction has 145 states and 171 transitions. [2022-04-06 20:00:36,651 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 29 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:00:36,651 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 171 transitions. [2022-04-06 20:00:36,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-06 20:00:36,652 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:00:36,652 INFO L499 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:00:36,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-04-06 20:00:36,868 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-04-06 20:00:36,868 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:00:36,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:00:36,869 INFO L85 PathProgramCache]: Analyzing trace with hash 867062775, now seen corresponding path program 51 times [2022-04-06 20:00:36,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:00:36,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1055767138] [2022-04-06 20:00:36,869 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:00:36,869 INFO L85 PathProgramCache]: Analyzing trace with hash 867062775, now seen corresponding path program 52 times [2022-04-06 20:00:36,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:00:36,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433179261] [2022-04-06 20:00:36,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:00:36,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:00:36,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:00:37,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:00:37,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:00:37,194 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:37,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:00:37,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433179261] [2022-04-06 20:00:37,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433179261] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:00:37,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188024033] [2022-04-06 20:00:37,194 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:00:37,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:00:37,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:00:37,195 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:00:37,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-04-06 20:00:37,240 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:00:37,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:00:37,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 30 conjunts are in the unsatisfiable core [2022-04-06 20:00:37,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:00:37,375 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:37,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:00:38,167 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:38,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188024033] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:00:38,167 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:00:38,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 62 [2022-04-06 20:00:38,167 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:00:38,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1055767138] [2022-04-06 20:00:38,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1055767138] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:00:38,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:00:38,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-04-06 20:00:38,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749887213] [2022-04-06 20:00:38,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:00:38,168 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-04-06 20:00:38,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:00:38,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-04-06 20:00:38,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1608, Invalid=2174, Unknown=0, NotChecked=0, Total=3782 [2022-04-06 20:00:38,168 INFO L87 Difference]: Start difference. First operand 145 states and 171 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 30 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:00:38,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:00:38,780 INFO L93 Difference]: Finished difference Result 163 states and 191 transitions. [2022-04-06 20:00:38,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-06 20:00:38,781 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 30 states have internal predecessors, (65), 2 states have call successors, (3), 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 69 [2022-04-06 20:00:38,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:00:38,781 INFO L225 Difference]: With dead ends: 163 [2022-04-06 20:00:38,781 INFO L226 Difference]: Without dead ends: 157 [2022-04-06 20:00:38,782 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3158, Invalid=5032, Unknown=0, NotChecked=0, Total=8190 [2022-04-06 20:00:38,782 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 326 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:00:38,782 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 55 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:00:38,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-04-06 20:00:38,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 150. [2022-04-06 20:00:38,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 145 states have (on average 1.193103448275862) internal successors, (173), 145 states have internal predecessors, (173), 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) [2022-04-06 20:00:38,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 177 transitions. [2022-04-06 20:00:38,811 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 177 transitions. Word has length 69 [2022-04-06 20:00:38,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:00:38,812 INFO L478 AbstractCegarLoop]: Abstraction has 150 states and 177 transitions. [2022-04-06 20:00:38,812 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 30 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:00:38,812 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 177 transitions. [2022-04-06 20:00:38,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-04-06 20:00:38,812 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:00:38,812 INFO L499 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:00:38,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-04-06 20:00:39,043 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-04-06 20:00:39,043 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:00:39,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:00:39,044 INFO L85 PathProgramCache]: Analyzing trace with hash -334824462, now seen corresponding path program 53 times [2022-04-06 20:00:39,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:00:39,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1319468690] [2022-04-06 20:00:39,044 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:00:39,044 INFO L85 PathProgramCache]: Analyzing trace with hash -334824462, now seen corresponding path program 54 times [2022-04-06 20:00:39,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:00:39,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685940354] [2022-04-06 20:00:39,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:00:39,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:00:39,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:00:39,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:00:39,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:00:39,383 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:39,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:00:39,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685940354] [2022-04-06 20:00:39,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685940354] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:00:39,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759665259] [2022-04-06 20:00:39,383 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:00:39,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:00:39,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:00:39,384 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:00:39,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-04-06 20:00:39,439 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2022-04-06 20:00:39,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:00:39,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 31 conjunts are in the unsatisfiable core [2022-04-06 20:00:39,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:00:39,570 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:39,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:00:40,459 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:40,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759665259] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:00:40,459 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:00:40,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 64 [2022-04-06 20:00:40,459 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:00:40,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1319468690] [2022-04-06 20:00:40,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1319468690] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:00:40,460 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:00:40,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-04-06 20:00:40,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201739127] [2022-04-06 20:00:40,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:00:40,460 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-06 20:00:40,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:00:40,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-06 20:00:40,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1723, Invalid=2309, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 20:00:40,461 INFO L87 Difference]: Start difference. First operand 150 states and 177 transitions. Second operand has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 31 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:00:41,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:00:41,121 INFO L93 Difference]: Finished difference Result 168 states and 197 transitions. [2022-04-06 20:00:41,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-04-06 20:00:41,121 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 31 states have internal predecessors, (67), 2 states have call successors, (3), 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 71 [2022-04-06 20:00:41,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:00:41,122 INFO L225 Difference]: With dead ends: 168 [2022-04-06 20:00:41,122 INFO L226 Difference]: Without dead ends: 162 [2022-04-06 20:00:41,123 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 907 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3386, Invalid=5356, Unknown=0, NotChecked=0, Total=8742 [2022-04-06 20:00:41,123 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 339 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:00:41,123 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 55 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:00:41,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-04-06 20:00:41,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 155. [2022-04-06 20:00:41,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 150 states have (on average 1.1933333333333334) internal successors, (179), 150 states have internal predecessors, (179), 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) [2022-04-06 20:00:41,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 183 transitions. [2022-04-06 20:00:41,157 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 183 transitions. Word has length 71 [2022-04-06 20:00:41,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:00:41,157 INFO L478 AbstractCegarLoop]: Abstraction has 155 states and 183 transitions. [2022-04-06 20:00:41,157 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 31 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:00:41,157 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 183 transitions. [2022-04-06 20:00:41,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-04-06 20:00:41,158 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:00:41,158 INFO L499 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:00:41,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-04-06 20:00:41,370 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-04-06 20:00:41,370 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:00:41,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:00:41,370 INFO L85 PathProgramCache]: Analyzing trace with hash -2256595, now seen corresponding path program 55 times [2022-04-06 20:00:41,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:00:41,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1187095119] [2022-04-06 20:00:41,370 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:00:41,371 INFO L85 PathProgramCache]: Analyzing trace with hash -2256595, now seen corresponding path program 56 times [2022-04-06 20:00:41,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:00:41,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572466426] [2022-04-06 20:00:41,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:00:41,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:00:41,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:00:41,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:00:41,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:00:41,736 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:41,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:00:41,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572466426] [2022-04-06 20:00:41,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572466426] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:00:41,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134835386] [2022-04-06 20:00:41,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:00:41,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:00:41,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:00:41,738 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:00:41,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-04-06 20:00:41,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:00:41,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:00:41,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 32 conjunts are in the unsatisfiable core [2022-04-06 20:00:41,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:00:41,922 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:41,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:00:42,518 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:42,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134835386] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:00:42,518 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:00:42,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 66 [2022-04-06 20:00:42,519 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:00:42,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1187095119] [2022-04-06 20:00:42,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1187095119] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:00:42,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:00:42,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-04-06 20:00:42,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109836770] [2022-04-06 20:00:42,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:00:42,519 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-04-06 20:00:42,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:00:42,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-04-06 20:00:42,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1842, Invalid=2448, Unknown=0, NotChecked=0, Total=4290 [2022-04-06 20:00:42,520 INFO L87 Difference]: Start difference. First operand 155 states and 183 transitions. Second operand has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 32 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:00:43,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:00:43,090 INFO L93 Difference]: Finished difference Result 173 states and 203 transitions. [2022-04-06 20:00:43,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-06 20:00:43,090 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 32 states have internal predecessors, (69), 2 states have call successors, (3), 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 73 [2022-04-06 20:00:43,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:00:43,094 INFO L225 Difference]: With dead ends: 173 [2022-04-06 20:00:43,094 INFO L226 Difference]: Without dead ends: 167 [2022-04-06 20:00:43,094 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 954 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3622, Invalid=5690, Unknown=0, NotChecked=0, Total=9312 [2022-04-06 20:00:43,095 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 379 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:00:43,096 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [379 Valid, 50 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:00:43,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-04-06 20:00:43,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 160. [2022-04-06 20:00:43,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 155 states have (on average 1.1935483870967742) internal successors, (185), 155 states have internal predecessors, (185), 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) [2022-04-06 20:00:43,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 189 transitions. [2022-04-06 20:00:43,135 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 189 transitions. Word has length 73 [2022-04-06 20:00:43,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:00:43,135 INFO L478 AbstractCegarLoop]: Abstraction has 160 states and 189 transitions. [2022-04-06 20:00:43,135 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 32 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:00:43,135 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 189 transitions. [2022-04-06 20:00:43,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-04-06 20:00:43,135 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:00:43,135 INFO L499 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:00:43,152 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-04-06 20:00:43,351 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:00:43,352 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:00:43,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:00:43,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1767883688, now seen corresponding path program 57 times [2022-04-06 20:00:43,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:00:43,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1916823556] [2022-04-06 20:00:43,353 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:00:43,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1767883688, now seen corresponding path program 58 times [2022-04-06 20:00:43,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:00:43,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105842211] [2022-04-06 20:00:43,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:00:43,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:00:43,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:00:43,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:00:43,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:00:43,669 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:43,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:00:43,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105842211] [2022-04-06 20:00:43,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105842211] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:00:43,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106423396] [2022-04-06 20:00:43,669 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:00:43,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:00:43,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:00:43,670 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:00:43,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-04-06 20:00:43,716 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:00:43,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:00:43,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 33 conjunts are in the unsatisfiable core [2022-04-06 20:00:43,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:00:43,802 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:43,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:00:44,664 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:44,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106423396] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:00:44,664 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:00:44,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 68 [2022-04-06 20:00:44,664 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:00:44,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1916823556] [2022-04-06 20:00:44,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1916823556] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:00:44,664 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:00:44,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-04-06 20:00:44,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072216866] [2022-04-06 20:00:44,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:00:44,665 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-04-06 20:00:44,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:00:44,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-04-06 20:00:44,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1965, Invalid=2591, Unknown=0, NotChecked=0, Total=4556 [2022-04-06 20:00:44,665 INFO L87 Difference]: Start difference. First operand 160 states and 189 transitions. Second operand has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 33 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:00:45,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:00:45,228 INFO L93 Difference]: Finished difference Result 178 states and 209 transitions. [2022-04-06 20:00:45,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-04-06 20:00:45,228 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 33 states have internal predecessors, (71), 2 states have call successors, (3), 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 75 [2022-04-06 20:00:45,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:00:45,229 INFO L225 Difference]: With dead ends: 178 [2022-04-06 20:00:45,229 INFO L226 Difference]: Without dead ends: 172 [2022-04-06 20:00:45,230 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1002 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3866, Invalid=6034, Unknown=0, NotChecked=0, Total=9900 [2022-04-06 20:00:45,230 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 371 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:00:45,230 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [371 Valid, 60 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:00:45,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-04-06 20:00:45,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 165. [2022-04-06 20:00:45,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 160 states have (on average 1.19375) internal successors, (191), 160 states have internal predecessors, (191), 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) [2022-04-06 20:00:45,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 195 transitions. [2022-04-06 20:00:45,263 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 195 transitions. Word has length 75 [2022-04-06 20:00:45,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:00:45,264 INFO L478 AbstractCegarLoop]: Abstraction has 165 states and 195 transitions. [2022-04-06 20:00:45,264 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 33 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:00:45,264 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 195 transitions. [2022-04-06 20:00:45,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-04-06 20:00:45,264 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:00:45,264 INFO L499 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:00:45,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-04-06 20:00:45,480 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:00:45,480 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:00:45,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:00:45,480 INFO L85 PathProgramCache]: Analyzing trace with hash 2065646435, now seen corresponding path program 59 times [2022-04-06 20:00:45,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:00:45,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [122700733] [2022-04-06 20:00:45,481 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:00:45,481 INFO L85 PathProgramCache]: Analyzing trace with hash 2065646435, now seen corresponding path program 60 times [2022-04-06 20:00:45,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:00:45,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757627884] [2022-04-06 20:00:45,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:00:45,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:00:45,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:00:45,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:00:45,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:00:45,881 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:45,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:00:45,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757627884] [2022-04-06 20:00:45,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757627884] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:00:45,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799144940] [2022-04-06 20:00:45,882 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:00:45,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:00:45,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:00:45,883 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:00:45,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-04-06 20:00:45,942 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2022-04-06 20:00:45,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:00:45,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-06 20:00:45,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:00:46,087 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:46,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:00:47,149 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:47,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799144940] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:00:47,149 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:00:47,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 70 [2022-04-06 20:00:47,149 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:00:47,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [122700733] [2022-04-06 20:00:47,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [122700733] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:00:47,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:00:47,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-04-06 20:00:47,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090448087] [2022-04-06 20:00:47,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:00:47,150 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-04-06 20:00:47,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:00:47,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-04-06 20:00:47,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2092, Invalid=2738, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 20:00:47,151 INFO L87 Difference]: Start difference. First operand 165 states and 195 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 34 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:00:47,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:00:47,842 INFO L93 Difference]: Finished difference Result 183 states and 215 transitions. [2022-04-06 20:00:47,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-06 20:00:47,843 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 34 states have internal predecessors, (73), 2 states have call successors, (3), 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 77 [2022-04-06 20:00:47,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:00:47,844 INFO L225 Difference]: With dead ends: 183 [2022-04-06 20:00:47,844 INFO L226 Difference]: Without dead ends: 177 [2022-04-06 20:00:47,845 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1051 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4118, Invalid=6388, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 20:00:47,847 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 441 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:00:47,847 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [441 Valid, 35 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:00:47,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-04-06 20:00:47,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 170. [2022-04-06 20:00:47,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 165 states have (on average 1.1939393939393939) internal successors, (197), 165 states have internal predecessors, (197), 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) [2022-04-06 20:00:47,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 201 transitions. [2022-04-06 20:00:47,883 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 201 transitions. Word has length 77 [2022-04-06 20:00:47,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:00:47,883 INFO L478 AbstractCegarLoop]: Abstraction has 170 states and 201 transitions. [2022-04-06 20:00:47,883 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 34 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:00:47,883 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 201 transitions. [2022-04-06 20:00:47,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-04-06 20:00:47,884 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:00:47,884 INFO L499 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:00:47,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-04-06 20:00:48,099 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-04-06 20:00:48,100 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:00:48,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:00:48,100 INFO L85 PathProgramCache]: Analyzing trace with hash 452837470, now seen corresponding path program 61 times [2022-04-06 20:00:48,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:00:48,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1770864940] [2022-04-06 20:00:48,101 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:00:48,101 INFO L85 PathProgramCache]: Analyzing trace with hash 452837470, now seen corresponding path program 62 times [2022-04-06 20:00:48,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:00:48,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806259693] [2022-04-06 20:00:48,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:00:48,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:00:48,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:00:48,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:00:48,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:00:48,512 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:48,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:00:48,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806259693] [2022-04-06 20:00:48,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806259693] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:00:48,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580890338] [2022-04-06 20:00:48,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:00:48,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:00:48,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:00:48,514 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:00:48,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-04-06 20:00:48,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:00:48,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:00:48,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-06 20:00:48,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:00:48,731 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:48,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:00:49,679 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:49,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580890338] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:00:49,679 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:00:49,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 72 [2022-04-06 20:00:49,679 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:00:49,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1770864940] [2022-04-06 20:00:49,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1770864940] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:00:49,679 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:00:49,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-04-06 20:00:49,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713233351] [2022-04-06 20:00:49,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:00:49,680 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-04-06 20:00:49,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:00:49,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-04-06 20:00:49,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2223, Invalid=2889, Unknown=0, NotChecked=0, Total=5112 [2022-04-06 20:00:49,681 INFO L87 Difference]: Start difference. First operand 170 states and 201 transitions. Second operand has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 35 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:00:50,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:00:50,276 INFO L93 Difference]: Finished difference Result 188 states and 221 transitions. [2022-04-06 20:00:50,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-04-06 20:00:50,276 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 35 states have internal predecessors, (75), 2 states have call successors, (3), 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 79 [2022-04-06 20:00:50,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:00:50,277 INFO L225 Difference]: With dead ends: 188 [2022-04-06 20:00:50,277 INFO L226 Difference]: Without dead ends: 182 [2022-04-06 20:00:50,278 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 124 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1101 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=4378, Invalid=6752, Unknown=0, NotChecked=0, Total=11130 [2022-04-06 20:00:50,278 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 400 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:00:50,278 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [400 Valid, 60 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:00:50,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-04-06 20:00:50,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 175. [2022-04-06 20:00:50,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 170 states have (on average 1.1941176470588235) internal successors, (203), 170 states have internal predecessors, (203), 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) [2022-04-06 20:00:50,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 207 transitions. [2022-04-06 20:00:50,315 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 207 transitions. Word has length 79 [2022-04-06 20:00:50,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:00:50,315 INFO L478 AbstractCegarLoop]: Abstraction has 175 states and 207 transitions. [2022-04-06 20:00:50,315 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 35 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:00:50,315 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 207 transitions. [2022-04-06 20:00:50,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-04-06 20:00:50,316 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:00:50,316 INFO L499 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:00:50,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-04-06 20:00:50,532 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:00:50,532 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:00:50,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:00:50,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1026615961, now seen corresponding path program 63 times [2022-04-06 20:00:50,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:00:50,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1681734040] [2022-04-06 20:00:50,533 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:00:50,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1026615961, now seen corresponding path program 64 times [2022-04-06 20:00:50,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:00:50,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425117829] [2022-04-06 20:00:50,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:00:50,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:00:50,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:00:50,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:00:50,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:00:50,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:50,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:00:50,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425117829] [2022-04-06 20:00:50,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425117829] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:00:50,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505857301] [2022-04-06 20:00:50,869 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:00:50,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:00:50,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:00:50,870 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:00:50,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-04-06 20:00:50,913 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:00:50,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:00:50,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 36 conjunts are in the unsatisfiable core [2022-04-06 20:00:50,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:00:51,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:51,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:00:52,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:52,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505857301] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:00:52,225 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:00:52,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 74 [2022-04-06 20:00:52,225 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:00:52,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1681734040] [2022-04-06 20:00:52,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1681734040] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:00:52,225 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:00:52,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-04-06 20:00:52,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845350576] [2022-04-06 20:00:52,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:00:52,226 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-04-06 20:00:52,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:00:52,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-04-06 20:00:52,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2358, Invalid=3044, Unknown=0, NotChecked=0, Total=5402 [2022-04-06 20:00:52,226 INFO L87 Difference]: Start difference. First operand 175 states and 207 transitions. Second operand has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 36 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:00:52,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:00:52,987 INFO L93 Difference]: Finished difference Result 193 states and 227 transitions. [2022-04-06 20:00:52,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 20:00:52,987 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 36 states have internal predecessors, (77), 2 states have call successors, (3), 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 81 [2022-04-06 20:00:52,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:00:52,988 INFO L225 Difference]: With dead ends: 193 [2022-04-06 20:00:52,988 INFO L226 Difference]: Without dead ends: 187 [2022-04-06 20:00:52,988 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 127 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1152 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4646, Invalid=7126, Unknown=0, NotChecked=0, Total=11772 [2022-04-06 20:00:52,989 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 509 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 509 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:00:52,989 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [509 Valid, 40 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:00:52,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-04-06 20:00:53,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 180. [2022-04-06 20:00:53,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 175 states have (on average 1.1942857142857144) internal successors, (209), 175 states have internal predecessors, (209), 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) [2022-04-06 20:00:53,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 213 transitions. [2022-04-06 20:00:53,030 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 213 transitions. Word has length 81 [2022-04-06 20:00:53,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:00:53,030 INFO L478 AbstractCegarLoop]: Abstraction has 180 states and 213 transitions. [2022-04-06 20:00:53,030 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 36 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:00:53,030 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 213 transitions. [2022-04-06 20:00:53,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-04-06 20:00:53,030 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:00:53,030 INFO L499 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:00:53,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-04-06 20:00:53,239 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:00:53,240 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:00:53,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:00:53,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1623035372, now seen corresponding path program 65 times [2022-04-06 20:00:53,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:00:53,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1838408329] [2022-04-06 20:00:53,240 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:00:53,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1623035372, now seen corresponding path program 66 times [2022-04-06 20:00:53,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:00:53,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159123245] [2022-04-06 20:00:53,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:00:53,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:00:53,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:00:53,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:00:53,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:00:53,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:53,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:00:53,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159123245] [2022-04-06 20:00:53,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159123245] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:00:53,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258808840] [2022-04-06 20:00:53,555 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:00:53,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:00:53,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:00:53,562 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:00:53,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-04-06 20:00:53,647 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2022-04-06 20:00:53,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:00:53,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-06 20:00:53,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:00:53,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:53,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:00:54,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:54,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258808840] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:00:54,880 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:00:54,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 76 [2022-04-06 20:00:54,881 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:00:54,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1838408329] [2022-04-06 20:00:54,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1838408329] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:00:54,881 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:00:54,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-04-06 20:00:54,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910066218] [2022-04-06 20:00:54,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:00:54,881 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-04-06 20:00:54,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:00:54,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-04-06 20:00:54,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2497, Invalid=3203, Unknown=0, NotChecked=0, Total=5700 [2022-04-06 20:00:54,882 INFO L87 Difference]: Start difference. First operand 180 states and 213 transitions. Second operand has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 37 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:00:55,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:00:55,903 INFO L93 Difference]: Finished difference Result 198 states and 233 transitions. [2022-04-06 20:00:55,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-04-06 20:00:55,903 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 37 states have internal predecessors, (79), 2 states have call successors, (3), 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 83 [2022-04-06 20:00:55,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:00:55,904 INFO L225 Difference]: With dead ends: 198 [2022-04-06 20:00:55,904 INFO L226 Difference]: Without dead ends: 192 [2022-04-06 20:00:55,905 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1204 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4922, Invalid=7510, Unknown=0, NotChecked=0, Total=12432 [2022-04-06 20:00:55,905 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 525 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:00:55,905 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [525 Valid, 50 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:00:55,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-04-06 20:00:55,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 185. [2022-04-06 20:00:55,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 180 states have (on average 1.1944444444444444) internal successors, (215), 180 states have internal predecessors, (215), 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) [2022-04-06 20:00:55,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 219 transitions. [2022-04-06 20:00:55,954 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 219 transitions. Word has length 83 [2022-04-06 20:00:55,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:00:55,954 INFO L478 AbstractCegarLoop]: Abstraction has 185 states and 219 transitions. [2022-04-06 20:00:55,955 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 37 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:00:55,955 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 219 transitions. [2022-04-06 20:00:55,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-04-06 20:00:55,955 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:00:55,955 INFO L499 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:00:55,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-04-06 20:00:56,171 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-04-06 20:00:56,172 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:00:56,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:00:56,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1022359857, now seen corresponding path program 67 times [2022-04-06 20:00:56,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:00:56,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2105278563] [2022-04-06 20:00:56,172 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:00:56,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1022359857, now seen corresponding path program 68 times [2022-04-06 20:00:56,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:00:56,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797955295] [2022-04-06 20:00:56,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:00:56,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:00:56,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:00:56,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:00:56,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:00:56,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:56,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:00:56,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797955295] [2022-04-06 20:00:56,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797955295] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:00:56,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323225784] [2022-04-06 20:00:56,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:00:56,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:00:56,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:00:56,704 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:00:56,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-04-06 20:00:56,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:00:56,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:00:56,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-06 20:00:56,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:00:56,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:56,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:00:58,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:58,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323225784] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:00:58,050 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:00:58,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 78 [2022-04-06 20:00:58,050 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:00:58,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2105278563] [2022-04-06 20:00:58,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2105278563] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:00:58,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:00:58,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-04-06 20:00:58,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400554409] [2022-04-06 20:00:58,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:00:58,050 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-04-06 20:00:58,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:00:58,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-04-06 20:00:58,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2640, Invalid=3366, Unknown=0, NotChecked=0, Total=6006 [2022-04-06 20:00:58,051 INFO L87 Difference]: Start difference. First operand 185 states and 219 transitions. Second operand has 40 states, 40 states have (on average 2.025) internal successors, (81), 38 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:00:58,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:00:58,939 INFO L93 Difference]: Finished difference Result 203 states and 239 transitions. [2022-04-06 20:00:58,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-06 20:00:58,940 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.025) internal successors, (81), 38 states have internal predecessors, (81), 2 states have call successors, (3), 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 85 [2022-04-06 20:00:58,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:00:58,940 INFO L225 Difference]: With dead ends: 203 [2022-04-06 20:00:58,940 INFO L226 Difference]: Without dead ends: 197 [2022-04-06 20:00:58,941 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1257 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=5206, Invalid=7904, Unknown=0, NotChecked=0, Total=13110 [2022-04-06 20:00:58,941 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 664 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 664 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:00:58,941 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [664 Valid, 35 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:00:58,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-04-06 20:00:59,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 190. [2022-04-06 20:00:59,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 185 states have (on average 1.1945945945945946) internal successors, (221), 185 states have internal predecessors, (221), 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) [2022-04-06 20:00:59,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 225 transitions. [2022-04-06 20:00:59,001 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 225 transitions. Word has length 85 [2022-04-06 20:00:59,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:00:59,001 INFO L478 AbstractCegarLoop]: Abstraction has 190 states and 225 transitions. [2022-04-06 20:00:59,001 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.025) internal successors, (81), 38 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:00:59,001 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 225 transitions. [2022-04-06 20:00:59,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-04-06 20:00:59,002 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:00:59,002 INFO L499 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:00:59,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-04-06 20:00:59,218 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-04-06 20:00:59,218 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:00:59,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:00:59,218 INFO L85 PathProgramCache]: Analyzing trace with hash 701192394, now seen corresponding path program 69 times [2022-04-06 20:00:59,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:00:59,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [339551571] [2022-04-06 20:00:59,219 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:00:59,219 INFO L85 PathProgramCache]: Analyzing trace with hash 701192394, now seen corresponding path program 70 times [2022-04-06 20:00:59,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:00:59,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103352861] [2022-04-06 20:00:59,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:00:59,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:00:59,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:00:59,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:00:59,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:00:59,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:59,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:00:59,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103352861] [2022-04-06 20:00:59,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103352861] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:00:59,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302137028] [2022-04-06 20:00:59,726 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:00:59,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:00:59,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:00:59,739 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:00:59,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-04-06 20:00:59,794 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:00:59,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:00:59,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-06 20:00:59,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:00:59,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:59,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:01:01,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:01:01,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302137028] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:01:01,075 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:01:01,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 80 [2022-04-06 20:01:01,075 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:01:01,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [339551571] [2022-04-06 20:01:01,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [339551571] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:01:01,075 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:01:01,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-04-06 20:01:01,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611055583] [2022-04-06 20:01:01,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:01:01,076 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-04-06 20:01:01,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:01:01,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-04-06 20:01:01,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2787, Invalid=3533, Unknown=0, NotChecked=0, Total=6320 [2022-04-06 20:01:01,077 INFO L87 Difference]: Start difference. First operand 190 states and 225 transitions. Second operand has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 39 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:01:01,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:01:01,786 INFO L93 Difference]: Finished difference Result 208 states and 245 transitions. [2022-04-06 20:01:01,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-04-06 20:01:01,786 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 39 states have internal predecessors, (83), 2 states have call successors, (3), 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 87 [2022-04-06 20:01:01,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:01:01,787 INFO L225 Difference]: With dead ends: 208 [2022-04-06 20:01:01,787 INFO L226 Difference]: Without dead ends: 202 [2022-04-06 20:01:01,788 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1311 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=5498, Invalid=8308, Unknown=0, NotChecked=0, Total=13806 [2022-04-06 20:01:01,789 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 533 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:01:01,789 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [533 Valid, 55 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:01:01,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-04-06 20:01:01,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 195. [2022-04-06 20:01:01,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 190 states have (on average 1.194736842105263) internal successors, (227), 190 states have internal predecessors, (227), 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) [2022-04-06 20:01:01,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 231 transitions. [2022-04-06 20:01:01,835 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 231 transitions. Word has length 87 [2022-04-06 20:01:01,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:01:01,835 INFO L478 AbstractCegarLoop]: Abstraction has 195 states and 231 transitions. [2022-04-06 20:01:01,835 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 39 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:01:01,835 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 231 transitions. [2022-04-06 20:01:01,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-04-06 20:01:01,836 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:01:01,836 INFO L499 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:01:01,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-04-06 20:01:02,052 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-04-06 20:01:02,052 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:01:02,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:01:02,052 INFO L85 PathProgramCache]: Analyzing trace with hash -822470651, now seen corresponding path program 71 times [2022-04-06 20:01:02,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:01:02,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [39738891] [2022-04-06 20:01:02,053 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:01:02,053 INFO L85 PathProgramCache]: Analyzing trace with hash -822470651, now seen corresponding path program 72 times [2022-04-06 20:01:02,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:01:02,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124319025] [2022-04-06 20:01:02,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:01:02,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:01:02,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:01:02,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:01:02,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:01:02,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:01:02,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:01:02,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124319025] [2022-04-06 20:01:02,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124319025] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:01:02,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100641296] [2022-04-06 20:01:02,571 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:01:02,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:01:02,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:01:02,572 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:01:02,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-04-06 20:01:02,642 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2022-04-06 20:01:02,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:01:02,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 40 conjunts are in the unsatisfiable core [2022-04-06 20:01:02,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:01:02,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:01:02,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:01:04,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:01:04,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100641296] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:01:04,145 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:01:04,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 41] total 82 [2022-04-06 20:01:04,145 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:01:04,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [39738891] [2022-04-06 20:01:04,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [39738891] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:01:04,145 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:01:04,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-04-06 20:01:04,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191292818] [2022-04-06 20:01:04,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:01:04,146 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-04-06 20:01:04,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:01:04,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-04-06 20:01:04,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2938, Invalid=3704, Unknown=0, NotChecked=0, Total=6642 [2022-04-06 20:01:04,147 INFO L87 Difference]: Start difference. First operand 195 states and 231 transitions. Second operand has 42 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 40 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:01:05,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:01:05,044 INFO L93 Difference]: Finished difference Result 213 states and 251 transitions. [2022-04-06 20:01:05,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-04-06 20:01:05,044 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 40 states have internal predecessors, (85), 2 states have call successors, (3), 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 89 [2022-04-06 20:01:05,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:01:05,045 INFO L225 Difference]: With dead ends: 213 [2022-04-06 20:01:05,045 INFO L226 Difference]: Without dead ends: 207 [2022-04-06 20:01:05,046 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1366 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=5798, Invalid=8722, Unknown=0, NotChecked=0, Total=14520 [2022-04-06 20:01:05,047 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 453 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:01:05,047 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [453 Valid, 55 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:01:05,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-04-06 20:01:05,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 200. [2022-04-06 20:01:05,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 195 states have (on average 1.1948717948717948) internal successors, (233), 195 states have internal predecessors, (233), 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) [2022-04-06 20:01:05,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 237 transitions. [2022-04-06 20:01:05,099 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 237 transitions. Word has length 89 [2022-04-06 20:01:05,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:01:05,100 INFO L478 AbstractCegarLoop]: Abstraction has 200 states and 237 transitions. [2022-04-06 20:01:05,100 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 40 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:01:05,100 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 237 transitions. [2022-04-06 20:01:05,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-04-06 20:01:05,100 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:01:05,100 INFO L499 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:01:05,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-04-06 20:01:05,306 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:01:05,306 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:01:05,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:01:05,306 INFO L85 PathProgramCache]: Analyzing trace with hash -478808960, now seen corresponding path program 73 times [2022-04-06 20:01:05,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:01:05,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1797139795] [2022-04-06 20:01:05,307 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:01:05,307 INFO L85 PathProgramCache]: Analyzing trace with hash -478808960, now seen corresponding path program 74 times [2022-04-06 20:01:05,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:01:05,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455704892] [2022-04-06 20:01:05,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:01:05,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:01:05,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:01:05,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:01:05,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:01:05,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:01:05,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:01:05,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455704892] [2022-04-06 20:01:05,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455704892] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:01:05,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553434051] [2022-04-06 20:01:05,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:01:05,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:01:05,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:01:05,885 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:01:05,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-04-06 20:01:05,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:01:05,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:01:05,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 20:01:05,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:01:06,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:01:06,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:01:07,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:01:07,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553434051] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:01:07,666 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:01:07,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 84 [2022-04-06 20:01:07,667 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:01:07,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1797139795] [2022-04-06 20:01:07,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1797139795] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:01:07,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:01:07,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-04-06 20:01:07,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892379934] [2022-04-06 20:01:07,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:01:07,667 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-04-06 20:01:07,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:01:07,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-04-06 20:01:07,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3093, Invalid=3879, Unknown=0, NotChecked=0, Total=6972 [2022-04-06 20:01:07,668 INFO L87 Difference]: Start difference. First operand 200 states and 237 transitions. Second operand has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 41 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:01:08,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:01:08,412 INFO L93 Difference]: Finished difference Result 218 states and 257 transitions. [2022-04-06 20:01:08,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-04-06 20:01:08,412 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 41 states have internal predecessors, (87), 2 states have call successors, (3), 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 91 [2022-04-06 20:01:08,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:01:08,413 INFO L225 Difference]: With dead ends: 218 [2022-04-06 20:01:08,413 INFO L226 Difference]: Without dead ends: 212 [2022-04-06 20:01:08,414 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 142 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1422 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=6106, Invalid=9146, Unknown=0, NotChecked=0, Total=15252 [2022-04-06 20:01:08,414 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 553 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 553 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:01:08,414 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [553 Valid, 40 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:01:08,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-04-06 20:01:08,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 205. [2022-04-06 20:01:08,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 200 states have (on average 1.195) internal successors, (239), 200 states have internal predecessors, (239), 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) [2022-04-06 20:01:08,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 243 transitions. [2022-04-06 20:01:08,465 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 243 transitions. Word has length 91 [2022-04-06 20:01:08,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:01:08,465 INFO L478 AbstractCegarLoop]: Abstraction has 205 states and 243 transitions. [2022-04-06 20:01:08,466 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 41 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:01:08,466 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 243 transitions. [2022-04-06 20:01:08,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-04-06 20:01:08,466 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:01:08,466 INFO L499 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:01:08,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-04-06 20:01:08,682 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-04-06 20:01:08,682 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:01:08,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:01:08,682 INFO L85 PathProgramCache]: Analyzing trace with hash -932405701, now seen corresponding path program 75 times [2022-04-06 20:01:08,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:01:08,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1063437266] [2022-04-06 20:01:08,683 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:01:08,683 INFO L85 PathProgramCache]: Analyzing trace with hash -932405701, now seen corresponding path program 76 times [2022-04-06 20:01:08,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:01:08,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854821955] [2022-04-06 20:01:08,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:01:08,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:01:08,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:01:09,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:01:09,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:01:09,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:01:09,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:01:09,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854821955] [2022-04-06 20:01:09,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854821955] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:01:09,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803051669] [2022-04-06 20:01:09,250 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:01:09,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:01:09,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:01:09,251 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:01:09,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-04-06 20:01:09,305 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:01:09,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:01:09,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 42 conjunts are in the unsatisfiable core [2022-04-06 20:01:09,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:01:09,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:01:09,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:01:10,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:01:10,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803051669] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:01:10,882 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:01:10,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43, 43] total 86 [2022-04-06 20:01:10,882 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:01:10,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1063437266] [2022-04-06 20:01:10,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1063437266] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:01:10,882 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:01:10,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-04-06 20:01:10,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209626117] [2022-04-06 20:01:10,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:01:10,882 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-04-06 20:01:10,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:01:10,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-04-06 20:01:10,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3252, Invalid=4058, Unknown=0, NotChecked=0, Total=7310 [2022-04-06 20:01:10,884 INFO L87 Difference]: Start difference. First operand 205 states and 243 transitions. Second operand has 44 states, 44 states have (on average 2.022727272727273) internal successors, (89), 42 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:01:11,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:01:11,876 INFO L93 Difference]: Finished difference Result 223 states and 263 transitions. [2022-04-06 20:01:11,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-04-06 20:01:11,877 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.022727272727273) internal successors, (89), 42 states have internal predecessors, (89), 2 states have call successors, (3), 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 93 [2022-04-06 20:01:11,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:01:11,877 INFO L225 Difference]: With dead ends: 223 [2022-04-06 20:01:11,877 INFO L226 Difference]: Without dead ends: 217 [2022-04-06 20:01:11,878 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 145 SyntacticMatches, 1 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1479 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=6422, Invalid=9580, Unknown=0, NotChecked=0, Total=16002 [2022-04-06 20:01:11,879 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 515 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:01:11,879 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [515 Valid, 50 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:01:11,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-04-06 20:01:11,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 210. [2022-04-06 20:01:11,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 205 states have (on average 1.1951219512195121) internal successors, (245), 205 states have internal predecessors, (245), 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) [2022-04-06 20:01:11,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 249 transitions. [2022-04-06 20:01:11,938 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 249 transitions. Word has length 93 [2022-04-06 20:01:11,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:01:11,938 INFO L478 AbstractCegarLoop]: Abstraction has 210 states and 249 transitions. [2022-04-06 20:01:11,938 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.022727272727273) internal successors, (89), 42 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:01:11,938 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 249 transitions. [2022-04-06 20:01:11,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-04-06 20:01:11,939 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:01:11,939 INFO L499 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:01:11,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-04-06 20:01:12,155 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-04-06 20:01:12,155 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:01:12,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:01:12,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1247790390, now seen corresponding path program 77 times [2022-04-06 20:01:12,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:01:12,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [491692995] [2022-04-06 20:01:12,156 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:01:12,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1247790390, now seen corresponding path program 78 times [2022-04-06 20:01:12,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:01:12,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925747174] [2022-04-06 20:01:12,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:01:12,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:01:12,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:01:12,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:01:12,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:01:12,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:01:12,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:01:12,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925747174] [2022-04-06 20:01:12,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925747174] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:01:12,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578088089] [2022-04-06 20:01:12,752 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:01:12,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:01:12,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:01:12,753 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:01:12,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-04-06 20:01:12,824 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2022-04-06 20:01:12,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:01:12,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 43 conjunts are in the unsatisfiable core [2022-04-06 20:01:12,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:01:13,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:01:13,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:01:14,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:01:14,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578088089] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:01:14,705 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:01:14,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 88 [2022-04-06 20:01:14,705 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:01:14,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [491692995] [2022-04-06 20:01:14,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [491692995] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:01:14,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:01:14,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-04-06 20:01:14,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982343089] [2022-04-06 20:01:14,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:01:14,706 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-04-06 20:01:14,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:01:14,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-04-06 20:01:14,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3415, Invalid=4241, Unknown=0, NotChecked=0, Total=7656 [2022-04-06 20:01:14,707 INFO L87 Difference]: Start difference. First operand 210 states and 249 transitions. Second operand has 45 states, 45 states have (on average 2.022222222222222) internal successors, (91), 43 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:01:15,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:01:15,485 INFO L93 Difference]: Finished difference Result 228 states and 269 transitions. [2022-04-06 20:01:15,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-04-06 20:01:15,485 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.022222222222222) internal successors, (91), 43 states have internal predecessors, (91), 2 states have call successors, (3), 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 95 [2022-04-06 20:01:15,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:01:15,486 INFO L225 Difference]: With dead ends: 228 [2022-04-06 20:01:15,486 INFO L226 Difference]: Without dead ends: 222 [2022-04-06 20:01:15,487 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 148 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1537 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=6746, Invalid=10024, Unknown=0, NotChecked=0, Total=16770 [2022-04-06 20:01:15,488 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 471 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:01:15,488 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [471 Valid, 65 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:01:15,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-04-06 20:01:15,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 215. [2022-04-06 20:01:15,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 210 states have (on average 1.1952380952380952) internal successors, (251), 210 states have internal predecessors, (251), 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) [2022-04-06 20:01:15,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 255 transitions. [2022-04-06 20:01:15,544 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 255 transitions. Word has length 95 [2022-04-06 20:01:15,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:01:15,544 INFO L478 AbstractCegarLoop]: Abstraction has 215 states and 255 transitions. [2022-04-06 20:01:15,544 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.022222222222222) internal successors, (91), 43 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:01:15,544 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 255 transitions. [2022-04-06 20:01:15,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-04-06 20:01:15,545 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:01:15,545 INFO L499 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:01:15,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-04-06 20:01:15,760 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:01:15,761 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:01:15,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:01:15,761 INFO L85 PathProgramCache]: Analyzing trace with hash 472193393, now seen corresponding path program 79 times [2022-04-06 20:01:15,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:01:15,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2017283609] [2022-04-06 20:01:15,761 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:01:15,761 INFO L85 PathProgramCache]: Analyzing trace with hash 472193393, now seen corresponding path program 80 times [2022-04-06 20:01:15,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:01:15,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43806464] [2022-04-06 20:01:15,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:01:15,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:01:15,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:01:16,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:01:16,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:01:16,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:01:16,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:01:16,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43806464] [2022-04-06 20:01:16,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43806464] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:01:16,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496493383] [2022-04-06 20:01:16,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:01:16,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:01:16,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:01:16,213 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:01:16,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-04-06 20:01:16,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:01:16,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:01:16,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 44 conjunts are in the unsatisfiable core [2022-04-06 20:01:16,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:01:16,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:01:16,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:01:17,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:01:17,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496493383] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:01:17,461 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:01:17,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45, 45] total 90 [2022-04-06 20:01:17,462 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:01:17,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2017283609] [2022-04-06 20:01:17,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2017283609] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:01:17,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:01:17,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-04-06 20:01:17,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054527960] [2022-04-06 20:01:17,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:01:17,462 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-04-06 20:01:17,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:01:17,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-04-06 20:01:17,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3582, Invalid=4428, Unknown=0, NotChecked=0, Total=8010 [2022-04-06 20:01:17,463 INFO L87 Difference]: Start difference. First operand 215 states and 255 transitions. Second operand has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 44 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:01:18,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:01:18,613 INFO L93 Difference]: Finished difference Result 233 states and 275 transitions. [2022-04-06 20:01:18,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-04-06 20:01:18,613 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 44 states have internal predecessors, (93), 2 states have call successors, (3), 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 97 [2022-04-06 20:01:18,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:01:18,614 INFO L225 Difference]: With dead ends: 233 [2022-04-06 20:01:18,614 INFO L226 Difference]: Without dead ends: 227 [2022-04-06 20:01:18,615 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 151 SyntacticMatches, 1 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1596 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=7078, Invalid=10478, Unknown=0, NotChecked=0, Total=17556 [2022-04-06 20:01:18,615 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 583 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 583 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:01:18,615 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [583 Valid, 40 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:01:18,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-04-06 20:01:18,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 220. [2022-04-06 20:01:18,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 215 states have (on average 1.1953488372093024) internal successors, (257), 215 states have internal predecessors, (257), 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) [2022-04-06 20:01:18,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 261 transitions. [2022-04-06 20:01:18,674 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 261 transitions. Word has length 97 [2022-04-06 20:01:18,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:01:18,674 INFO L478 AbstractCegarLoop]: Abstraction has 220 states and 261 transitions. [2022-04-06 20:01:18,674 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 44 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:01:18,674 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 261 transitions. [2022-04-06 20:01:18,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-04-06 20:01:18,674 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:01:18,675 INFO L499 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:01:18,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-04-06 20:01:18,890 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-04-06 20:01:18,890 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:01:18,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:01:18,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1847178516, now seen corresponding path program 81 times [2022-04-06 20:01:18,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:01:18,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [40363270] [2022-04-06 20:01:18,891 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:01:18,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1847178516, now seen corresponding path program 82 times [2022-04-06 20:01:18,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:01:18,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756050720] [2022-04-06 20:01:18,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:01:18,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:01:18,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:01:19,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:01:19,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:01:19,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:01:19,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:01:19,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756050720] [2022-04-06 20:01:19,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756050720] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:01:19,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630245849] [2022-04-06 20:01:19,481 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:01:19,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:01:19,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:01:19,482 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:01:19,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-04-06 20:01:19,539 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:01:19,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:01:19,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 45 conjunts are in the unsatisfiable core [2022-04-06 20:01:19,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:01:19,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:01:19,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:01:21,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:01:21,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630245849] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:01:21,247 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:01:21,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 92 [2022-04-06 20:01:21,247 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:01:21,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [40363270] [2022-04-06 20:01:21,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [40363270] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:01:21,247 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:01:21,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-04-06 20:01:21,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733015020] [2022-04-06 20:01:21,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:01:21,248 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-04-06 20:01:21,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:01:21,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-04-06 20:01:21,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3753, Invalid=4619, Unknown=0, NotChecked=0, Total=8372 [2022-04-06 20:01:21,248 INFO L87 Difference]: Start difference. First operand 220 states and 261 transitions. Second operand has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 45 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:01:22,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:01:22,218 INFO L93 Difference]: Finished difference Result 238 states and 281 transitions. [2022-04-06 20:01:22,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-04-06 20:01:22,219 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 45 states have internal predecessors, (95), 2 states have call successors, (3), 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 99 [2022-04-06 20:01:22,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:01:22,220 INFO L225 Difference]: With dead ends: 238 [2022-04-06 20:01:22,220 INFO L226 Difference]: Without dead ends: 232 [2022-04-06 20:01:22,220 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 154 SyntacticMatches, 1 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1656 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=7418, Invalid=10942, Unknown=0, NotChecked=0, Total=18360 [2022-04-06 20:01:22,221 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 572 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 572 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:01:22,221 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [572 Valid, 60 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:01:22,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-04-06 20:01:22,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 225. [2022-04-06 20:01:22,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 220 states have (on average 1.1954545454545455) internal successors, (263), 220 states have internal predecessors, (263), 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) [2022-04-06 20:01:22,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 267 transitions. [2022-04-06 20:01:22,283 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 267 transitions. Word has length 99 [2022-04-06 20:01:22,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:01:22,284 INFO L478 AbstractCegarLoop]: Abstraction has 225 states and 267 transitions. [2022-04-06 20:01:22,284 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 45 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:01:22,284 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 267 transitions. [2022-04-06 20:01:22,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-04-06 20:01:22,285 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:01:22,285 INFO L499 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:01:22,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-04-06 20:01:22,501 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:01:22,501 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:01:22,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:01:22,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1675556441, now seen corresponding path program 83 times [2022-04-06 20:01:22,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:01:22,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [265984176] [2022-04-06 20:01:22,502 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:01:22,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1675556441, now seen corresponding path program 84 times [2022-04-06 20:01:22,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:01:22,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031833421] [2022-04-06 20:01:22,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:01:22,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:01:22,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:01:22,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:01:22,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:01:22,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:01:22,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:01:22,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031833421] [2022-04-06 20:01:22,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031833421] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:01:22,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783985345] [2022-04-06 20:01:22,969 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:01:22,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:01:22,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:01:22,970 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:01:23,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-04-06 20:01:23,080 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2022-04-06 20:01:23,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:01:23,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 46 conjunts are in the unsatisfiable core [2022-04-06 20:01:23,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:01:23,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:01:23,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:01:24,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:01:24,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783985345] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:01:24,582 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:01:24,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47, 47] total 94 [2022-04-06 20:01:24,582 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:01:24,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [265984176] [2022-04-06 20:01:24,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [265984176] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:01:24,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:01:24,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-04-06 20:01:24,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393504661] [2022-04-06 20:01:24,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:01:24,583 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-04-06 20:01:24,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:01:24,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-04-06 20:01:24,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3928, Invalid=4814, Unknown=0, NotChecked=0, Total=8742 [2022-04-06 20:01:24,584 INFO L87 Difference]: Start difference. First operand 225 states and 267 transitions. Second operand has 48 states, 48 states have (on average 2.0208333333333335) internal successors, (97), 46 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:01:25,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:01:25,820 INFO L93 Difference]: Finished difference Result 243 states and 287 transitions. [2022-04-06 20:01:25,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-04-06 20:01:25,821 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0208333333333335) internal successors, (97), 46 states have internal predecessors, (97), 2 states have call successors, (3), 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 101 [2022-04-06 20:01:25,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:01:25,821 INFO L225 Difference]: With dead ends: 243 [2022-04-06 20:01:25,821 INFO L226 Difference]: Without dead ends: 237 [2022-04-06 20:01:25,822 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 157 SyntacticMatches, 1 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1717 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=7766, Invalid=11416, Unknown=0, NotChecked=0, Total=19182 [2022-04-06 20:01:25,823 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 636 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 636 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:01:25,823 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [636 Valid, 50 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:01:25,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-04-06 20:01:25,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 230. [2022-04-06 20:01:25,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 225 states have (on average 1.1955555555555555) internal successors, (269), 225 states have internal predecessors, (269), 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) [2022-04-06 20:01:25,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 273 transitions. [2022-04-06 20:01:25,897 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 273 transitions. Word has length 101 [2022-04-06 20:01:25,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:01:25,897 INFO L478 AbstractCegarLoop]: Abstraction has 230 states and 273 transitions. [2022-04-06 20:01:25,898 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.0208333333333335) internal successors, (97), 46 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:01:25,898 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 273 transitions. [2022-04-06 20:01:25,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-04-06 20:01:25,898 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:01:25,898 INFO L499 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:01:25,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-04-06 20:01:26,114 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:01:26,114 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:01:26,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:01:26,114 INFO L85 PathProgramCache]: Analyzing trace with hash 44500386, now seen corresponding path program 85 times [2022-04-06 20:01:26,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:01:26,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1760162431] [2022-04-06 20:01:26,115 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:01:26,115 INFO L85 PathProgramCache]: Analyzing trace with hash 44500386, now seen corresponding path program 86 times [2022-04-06 20:01:26,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:01:26,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785182141] [2022-04-06 20:01:26,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:01:26,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:01:26,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:01:26,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:01:26,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:01:26,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:01:26,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:01:26,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785182141] [2022-04-06 20:01:26,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785182141] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:01:26,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429352760] [2022-04-06 20:01:26,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:01:26,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:01:26,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:01:26,825 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:01:26,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-04-06 20:01:26,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:01:26,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:01:26,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-06 20:01:26,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:01:27,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:01:27,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:01:28,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:01:28,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429352760] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:01:28,380 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:01:28,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 96 [2022-04-06 20:01:28,380 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:01:28,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1760162431] [2022-04-06 20:01:28,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1760162431] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:01:28,381 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:01:28,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-04-06 20:01:28,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009548263] [2022-04-06 20:01:28,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:01:28,381 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-04-06 20:01:28,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:01:28,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-04-06 20:01:28,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4107, Invalid=5013, Unknown=0, NotChecked=0, Total=9120 [2022-04-06 20:01:28,382 INFO L87 Difference]: Start difference. First operand 230 states and 273 transitions. Second operand has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 47 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:01:29,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:01:29,521 INFO L93 Difference]: Finished difference Result 248 states and 293 transitions. [2022-04-06 20:01:29,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-04-06 20:01:29,521 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 47 states have internal predecessors, (99), 2 states have call successors, (3), 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 103 [2022-04-06 20:01:29,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:01:29,522 INFO L225 Difference]: With dead ends: 248 [2022-04-06 20:01:29,522 INFO L226 Difference]: Without dead ends: 242 [2022-04-06 20:01:29,523 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1779 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=8122, Invalid=11900, Unknown=0, NotChecked=0, Total=20022 [2022-04-06 20:01:29,523 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 664 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 664 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:01:29,523 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [664 Valid, 40 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:01:29,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-04-06 20:01:29,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 235. [2022-04-06 20:01:29,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 230 states have (on average 1.1956521739130435) internal successors, (275), 230 states have internal predecessors, (275), 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) [2022-04-06 20:01:29,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 279 transitions. [2022-04-06 20:01:29,596 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 279 transitions. Word has length 103 [2022-04-06 20:01:29,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:01:29,597 INFO L478 AbstractCegarLoop]: Abstraction has 235 states and 279 transitions. [2022-04-06 20:01:29,597 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 47 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:01:29,597 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 279 transitions. [2022-04-06 20:01:29,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-04-06 20:01:29,597 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:01:29,597 INFO L499 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:01:29,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-04-06 20:01:29,826 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-04-06 20:01:29,826 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:01:29,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:01:29,827 INFO L85 PathProgramCache]: Analyzing trace with hash -543297827, now seen corresponding path program 87 times [2022-04-06 20:01:29,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:01:29,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2055693912] [2022-04-06 20:01:29,827 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:01:29,827 INFO L85 PathProgramCache]: Analyzing trace with hash -543297827, now seen corresponding path program 88 times [2022-04-06 20:01:29,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:01:29,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950319115] [2022-04-06 20:01:29,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:01:29,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:01:29,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:01:30,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:01:30,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:01:30,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:01:30,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:01:30,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950319115] [2022-04-06 20:01:30,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950319115] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:01:30,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056550290] [2022-04-06 20:01:30,537 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:01:30,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:01:30,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:01:30,538 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:01:30,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-04-06 20:01:30,615 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:01:30,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:01:30,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 48 conjunts are in the unsatisfiable core [2022-04-06 20:01:30,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:01:30,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:01:30,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:01:32,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:01:32,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056550290] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:01:32,398 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:01:32,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49, 49] total 98 [2022-04-06 20:01:32,399 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:01:32,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2055693912] [2022-04-06 20:01:32,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2055693912] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:01:32,399 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:01:32,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-04-06 20:01:32,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641320828] [2022-04-06 20:01:32,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:01:32,399 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-04-06 20:01:32,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:01:32,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-04-06 20:01:32,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4290, Invalid=5216, Unknown=0, NotChecked=0, Total=9506 [2022-04-06 20:01:32,400 INFO L87 Difference]: Start difference. First operand 235 states and 279 transitions. Second operand has 50 states, 50 states have (on average 2.02) internal successors, (101), 48 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:01:33,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:01:33,334 INFO L93 Difference]: Finished difference Result 253 states and 299 transitions. [2022-04-06 20:01:33,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-04-06 20:01:33,335 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.02) internal successors, (101), 48 states have internal predecessors, (101), 2 states have call successors, (3), 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 105 [2022-04-06 20:01:33,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:01:33,342 INFO L225 Difference]: With dead ends: 253 [2022-04-06 20:01:33,342 INFO L226 Difference]: Without dead ends: 247 [2022-04-06 20:01:33,343 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 163 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1842 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=8486, Invalid=12394, Unknown=0, NotChecked=0, Total=20880 [2022-04-06 20:01:33,344 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 590 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 590 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:01:33,344 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [590 Valid, 50 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:01:33,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-04-06 20:01:33,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 240. [2022-04-06 20:01:33,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 235 states have (on average 1.195744680851064) internal successors, (281), 235 states have internal predecessors, (281), 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) [2022-04-06 20:01:33,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 285 transitions. [2022-04-06 20:01:33,425 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 285 transitions. Word has length 105 [2022-04-06 20:01:33,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:01:33,426 INFO L478 AbstractCegarLoop]: Abstraction has 240 states and 285 transitions. [2022-04-06 20:01:33,426 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.02) internal successors, (101), 48 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:01:33,426 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 285 transitions. [2022-04-06 20:01:33,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-04-06 20:01:33,426 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:01:33,426 INFO L499 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:01:33,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-04-06 20:01:33,631 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-04-06 20:01:33,631 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:01:33,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:01:33,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1518302552, now seen corresponding path program 89 times [2022-04-06 20:01:33,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:01:33,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [866086861] [2022-04-06 20:01:33,632 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:01:33,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1518302552, now seen corresponding path program 90 times [2022-04-06 20:01:33,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:01:33,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706729664] [2022-04-06 20:01:33,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:01:33,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:01:33,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:01:34,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:01:34,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:01:34,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:01:34,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:01:34,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706729664] [2022-04-06 20:01:34,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706729664] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:01:34,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760717120] [2022-04-06 20:01:34,264 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:01:34,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:01:34,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:01:34,289 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:01:34,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-04-06 20:01:34,374 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2022-04-06 20:01:34,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:01:34,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 49 conjunts are in the unsatisfiable core [2022-04-06 20:01:34,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:01:34,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:01:34,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:01:35,832 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:01:35,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760717120] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:01:35,833 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:01:35,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 50] total 100 [2022-04-06 20:01:35,833 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:01:35,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [866086861] [2022-04-06 20:01:35,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [866086861] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:01:35,833 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:01:35,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-04-06 20:01:35,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735020377] [2022-04-06 20:01:35,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:01:35,833 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-04-06 20:01:35,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:01:35,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-04-06 20:01:35,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4477, Invalid=5423, Unknown=0, NotChecked=0, Total=9900 [2022-04-06 20:01:35,834 INFO L87 Difference]: Start difference. First operand 240 states and 285 transitions. Second operand has 51 states, 51 states have (on average 2.019607843137255) internal successors, (103), 49 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:01:36,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:01:36,873 INFO L93 Difference]: Finished difference Result 258 states and 305 transitions. [2022-04-06 20:01:36,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-04-06 20:01:36,873 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.019607843137255) internal successors, (103), 49 states have internal predecessors, (103), 2 states have call successors, (3), 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 107 [2022-04-06 20:01:36,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:01:36,881 INFO L225 Difference]: With dead ends: 258 [2022-04-06 20:01:36,881 INFO L226 Difference]: Without dead ends: 252 [2022-04-06 20:01:36,882 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 166 SyntacticMatches, 1 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1906 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=8858, Invalid=12898, Unknown=0, NotChecked=0, Total=21756 [2022-04-06 20:01:36,882 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 621 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 621 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:01:36,882 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [621 Valid, 45 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:01:36,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-04-06 20:01:36,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 245. [2022-04-06 20:01:36,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 240 states have (on average 1.1958333333333333) internal successors, (287), 240 states have internal predecessors, (287), 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) [2022-04-06 20:01:36,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 291 transitions. [2022-04-06 20:01:36,974 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 291 transitions. Word has length 107 [2022-04-06 20:01:36,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:01:36,974 INFO L478 AbstractCegarLoop]: Abstraction has 245 states and 291 transitions. [2022-04-06 20:01:36,974 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.019607843137255) internal successors, (103), 49 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:01:36,975 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 291 transitions. [2022-04-06 20:01:36,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-04-06 20:01:36,975 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:01:36,975 INFO L499 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:01:36,991 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-04-06 20:01:37,194 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-04-06 20:01:37,194 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:01:37,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:01:37,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1558623981, now seen corresponding path program 91 times [2022-04-06 20:01:37,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:01:37,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [277788036] [2022-04-06 20:01:37,194 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:01:37,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1558623981, now seen corresponding path program 92 times [2022-04-06 20:01:37,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:01:37,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871171240] [2022-04-06 20:01:37,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:01:37,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:01:37,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:01:37,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:01:37,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:01:37,751 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:01:37,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:01:37,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871171240] [2022-04-06 20:01:37,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871171240] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:01:37,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888885601] [2022-04-06 20:01:37,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:01:37,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:01:37,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:01:37,764 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:01:37,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-04-06 20:01:37,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:01:37,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:01:37,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 50 conjunts are in the unsatisfiable core [2022-04-06 20:01:37,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:01:38,025 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:01:38,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:01:39,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:01:39,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888885601] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:01:39,942 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:01:39,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51, 51] total 102 [2022-04-06 20:01:39,943 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:01:39,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [277788036] [2022-04-06 20:01:39,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [277788036] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:01:39,943 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:01:39,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-04-06 20:01:39,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479177153] [2022-04-06 20:01:39,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:01:39,943 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-04-06 20:01:39,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:01:39,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-04-06 20:01:39,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4668, Invalid=5634, Unknown=0, NotChecked=0, Total=10302 [2022-04-06 20:01:39,945 INFO L87 Difference]: Start difference. First operand 245 states and 291 transitions. Second operand has 52 states, 52 states have (on average 2.019230769230769) internal successors, (105), 50 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:01:41,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:01:41,132 INFO L93 Difference]: Finished difference Result 263 states and 311 transitions. [2022-04-06 20:01:41,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-04-06 20:01:41,132 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.019230769230769) internal successors, (105), 50 states have internal predecessors, (105), 2 states have call successors, (3), 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 109 [2022-04-06 20:01:41,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:01:41,133 INFO L225 Difference]: With dead ends: 263 [2022-04-06 20:01:41,133 INFO L226 Difference]: Without dead ends: 257 [2022-04-06 20:01:41,134 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 169 SyntacticMatches, 1 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1971 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=9238, Invalid=13412, Unknown=0, NotChecked=0, Total=22650 [2022-04-06 20:01:41,134 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 634 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 634 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:01:41,134 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [634 Valid, 35 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:01:41,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-04-06 20:01:41,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 250. [2022-04-06 20:01:41,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 245 states have (on average 1.1959183673469387) internal successors, (293), 245 states have internal predecessors, (293), 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) [2022-04-06 20:01:41,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 297 transitions. [2022-04-06 20:01:41,215 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 297 transitions. Word has length 109 [2022-04-06 20:01:41,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:01:41,215 INFO L478 AbstractCegarLoop]: Abstraction has 250 states and 297 transitions. [2022-04-06 20:01:41,215 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.019230769230769) internal successors, (105), 50 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:01:41,215 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 297 transitions. [2022-04-06 20:01:41,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-04-06 20:01:41,216 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:01:41,216 INFO L499 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:01:41,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-04-06 20:01:41,432 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:01:41,432 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:01:41,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:01:41,432 INFO L85 PathProgramCache]: Analyzing trace with hash 747444750, now seen corresponding path program 93 times [2022-04-06 20:01:41,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:01:41,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [63086406] [2022-04-06 20:01:41,433 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:01:41,433 INFO L85 PathProgramCache]: Analyzing trace with hash 747444750, now seen corresponding path program 94 times [2022-04-06 20:01:41,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:01:41,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957227151] [2022-04-06 20:01:41,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:01:41,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:01:41,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:01:42,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:01:42,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:01:42,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:01:42,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:01:42,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957227151] [2022-04-06 20:01:42,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957227151] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:01:42,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677326657] [2022-04-06 20:01:42,245 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:01:42,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:01:42,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:01:42,246 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:01:42,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-04-06 20:01:42,312 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:01:42,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:01:42,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 51 conjunts are in the unsatisfiable core [2022-04-06 20:01:42,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:01:42,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:01:42,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:01:44,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:01:44,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677326657] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:01:44,879 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:01:44,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52, 52] total 104 [2022-04-06 20:01:44,879 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:01:44,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [63086406] [2022-04-06 20:01:44,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [63086406] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:01:44,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:01:44,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-04-06 20:01:44,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452724635] [2022-04-06 20:01:44,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:01:44,880 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-04-06 20:01:44,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:01:44,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-04-06 20:01:44,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4863, Invalid=5849, Unknown=0, NotChecked=0, Total=10712 [2022-04-06 20:01:44,881 INFO L87 Difference]: Start difference. First operand 250 states and 297 transitions. Second operand has 53 states, 53 states have (on average 2.018867924528302) internal successors, (107), 51 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:01:46,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:01:46,133 INFO L93 Difference]: Finished difference Result 268 states and 317 transitions. [2022-04-06 20:01:46,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-04-06 20:01:46,134 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.018867924528302) internal successors, (107), 51 states have internal predecessors, (107), 2 states have call successors, (3), 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 111 [2022-04-06 20:01:46,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:01:46,134 INFO L225 Difference]: With dead ends: 268 [2022-04-06 20:01:46,134 INFO L226 Difference]: Without dead ends: 262 [2022-04-06 20:01:46,135 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 172 SyntacticMatches, 1 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2037 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=9626, Invalid=13936, Unknown=0, NotChecked=0, Total=23562 [2022-04-06 20:01:46,136 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 668 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 668 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:01:46,136 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [668 Valid, 45 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:01:46,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-04-06 20:01:46,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 255. [2022-04-06 20:01:46,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 250 states have (on average 1.196) internal successors, (299), 250 states have internal predecessors, (299), 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) [2022-04-06 20:01:46,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 303 transitions. [2022-04-06 20:01:46,215 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 303 transitions. Word has length 111 [2022-04-06 20:01:46,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:01:46,215 INFO L478 AbstractCegarLoop]: Abstraction has 255 states and 303 transitions. [2022-04-06 20:01:46,215 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.018867924528302) internal successors, (107), 51 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:01:46,215 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 303 transitions. [2022-04-06 20:01:46,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-04-06 20:01:46,216 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:01:46,216 INFO L499 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:01:46,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-04-06 20:01:46,439 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-04-06 20:01:46,440 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:01:46,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:01:46,441 INFO L85 PathProgramCache]: Analyzing trace with hash 676370505, now seen corresponding path program 95 times [2022-04-06 20:01:46,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:01:46,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1272019062] [2022-04-06 20:01:46,441 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:01:46,441 INFO L85 PathProgramCache]: Analyzing trace with hash 676370505, now seen corresponding path program 96 times [2022-04-06 20:01:46,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:01:46,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803376833] [2022-04-06 20:01:46,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:01:46,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:01:46,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:01:47,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:01:47,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:01:47,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:01:47,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:01:47,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803376833] [2022-04-06 20:01:47,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803376833] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:01:47,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948584564] [2022-04-06 20:01:47,024 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:01:47,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:01:47,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:01:47,025 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:01:47,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-04-06 20:01:47,111 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2022-04-06 20:01:47,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:01:47,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 52 conjunts are in the unsatisfiable core [2022-04-06 20:01:47,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:01:47,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:01:47,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:01:49,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:01:49,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948584564] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:01:49,768 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:01:49,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53, 53] total 106 [2022-04-06 20:01:49,768 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:01:49,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1272019062] [2022-04-06 20:01:49,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1272019062] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:01:49,768 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:01:49,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-04-06 20:01:49,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063909499] [2022-04-06 20:01:49,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:01:49,769 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-04-06 20:01:49,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:01:49,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-04-06 20:01:49,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5062, Invalid=6068, Unknown=0, NotChecked=0, Total=11130 [2022-04-06 20:01:49,770 INFO L87 Difference]: Start difference. First operand 255 states and 303 transitions. Second operand has 54 states, 54 states have (on average 2.0185185185185186) internal successors, (109), 52 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:01:51,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:01:51,399 INFO L93 Difference]: Finished difference Result 273 states and 323 transitions. [2022-04-06 20:01:51,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-04-06 20:01:51,399 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.0185185185185186) internal successors, (109), 52 states have internal predecessors, (109), 2 states have call successors, (3), 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 113 [2022-04-06 20:01:51,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:01:51,400 INFO L225 Difference]: With dead ends: 273 [2022-04-06 20:01:51,400 INFO L226 Difference]: Without dead ends: 267 [2022-04-06 20:01:51,401 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 175 SyntacticMatches, 1 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2104 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=10022, Invalid=14470, Unknown=0, NotChecked=0, Total=24492 [2022-04-06 20:01:51,401 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 696 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 696 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:01:51,401 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [696 Valid, 50 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:01:51,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-04-06 20:01:51,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 260. [2022-04-06 20:01:51,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 255 states have (on average 1.196078431372549) internal successors, (305), 255 states have internal predecessors, (305), 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) [2022-04-06 20:01:51,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 309 transitions. [2022-04-06 20:01:51,495 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 309 transitions. Word has length 113 [2022-04-06 20:01:51,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:01:51,495 INFO L478 AbstractCegarLoop]: Abstraction has 260 states and 309 transitions. [2022-04-06 20:01:51,496 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.0185185185185186) internal successors, (109), 52 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:01:51,496 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 309 transitions. [2022-04-06 20:01:51,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-04-06 20:01:51,496 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:01:51,496 INFO L499 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:01:51,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-04-06 20:01:51,712 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-04-06 20:01:51,713 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:01:51,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:01:51,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1093497796, now seen corresponding path program 97 times [2022-04-06 20:01:51,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:01:51,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1178434113] [2022-04-06 20:01:51,713 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:01:51,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1093497796, now seen corresponding path program 98 times [2022-04-06 20:01:51,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:01:51,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393532831] [2022-04-06 20:01:51,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:01:51,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:01:51,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:01:52,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:01:52,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:01:52,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:01:52,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:01:52,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393532831] [2022-04-06 20:01:52,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393532831] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:01:52,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515622804] [2022-04-06 20:01:52,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:01:52,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:01:52,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:01:52,600 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:01:52,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-04-06 20:01:52,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:01:52,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:01:52,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 53 conjunts are in the unsatisfiable core [2022-04-06 20:01:52,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:01:52,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:01:52,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:01:55,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:01:55,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515622804] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:01:55,191 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:01:55,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54, 54] total 108 [2022-04-06 20:01:55,191 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:01:55,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1178434113] [2022-04-06 20:01:55,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1178434113] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:01:55,191 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:01:55,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-04-06 20:01:55,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069035006] [2022-04-06 20:01:55,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:01:55,191 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-04-06 20:01:55,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:01:55,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-04-06 20:01:55,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5265, Invalid=6291, Unknown=0, NotChecked=0, Total=11556 [2022-04-06 20:01:55,193 INFO L87 Difference]: Start difference. First operand 260 states and 309 transitions. Second operand has 55 states, 55 states have (on average 2.018181818181818) internal successors, (111), 53 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:01:56,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:01:56,613 INFO L93 Difference]: Finished difference Result 278 states and 329 transitions. [2022-04-06 20:01:56,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-04-06 20:01:56,614 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.018181818181818) internal successors, (111), 53 states have internal predecessors, (111), 2 states have call successors, (3), 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 115 [2022-04-06 20:01:56,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:01:56,615 INFO L225 Difference]: With dead ends: 278 [2022-04-06 20:01:56,615 INFO L226 Difference]: Without dead ends: 272 [2022-04-06 20:01:56,616 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 178 SyntacticMatches, 1 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2172 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=10426, Invalid=15014, Unknown=0, NotChecked=0, Total=25440 [2022-04-06 20:01:56,616 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 808 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 300 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 808 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 300 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:01:56,616 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [808 Valid, 50 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [300 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:01:56,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-04-06 20:01:56,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 265. [2022-04-06 20:01:56,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 260 states have (on average 1.1961538461538461) internal successors, (311), 260 states have internal predecessors, (311), 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) [2022-04-06 20:01:56,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 315 transitions. [2022-04-06 20:01:56,711 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 315 transitions. Word has length 115 [2022-04-06 20:01:56,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:01:56,711 INFO L478 AbstractCegarLoop]: Abstraction has 265 states and 315 transitions. [2022-04-06 20:01:56,711 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.018181818181818) internal successors, (111), 53 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:01:56,711 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 315 transitions. [2022-04-06 20:01:56,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-04-06 20:01:56,712 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:01:56,712 INFO L499 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:01:56,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-04-06 20:01:56,916 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:01:56,916 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:01:56,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:01:56,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1774101377, now seen corresponding path program 99 times [2022-04-06 20:01:56,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:01:56,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1557278963] [2022-04-06 20:01:56,917 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:01:56,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1774101377, now seen corresponding path program 100 times [2022-04-06 20:01:56,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:01:56,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771006532] [2022-04-06 20:01:56,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:01:56,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:01:56,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:01:57,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:01:57,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:01:57,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:01:57,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:01:57,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771006532] [2022-04-06 20:01:57,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771006532] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:01:57,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682992735] [2022-04-06 20:01:57,869 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:01:57,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:01:57,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:01:57,871 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:01:57,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-04-06 20:01:57,937 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:01:57,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:01:57,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 54 conjunts are in the unsatisfiable core [2022-04-06 20:01:57,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:01:58,177 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:01:58,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:02:00,685 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:02:00,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682992735] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:02:00,685 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:02:00,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 55, 55] total 110 [2022-04-06 20:02:00,685 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:02:00,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1557278963] [2022-04-06 20:02:00,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1557278963] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:02:00,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:02:00,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-04-06 20:02:00,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889438269] [2022-04-06 20:02:00,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:02:00,686 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-04-06 20:02:00,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:02:00,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-04-06 20:02:00,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5472, Invalid=6518, Unknown=0, NotChecked=0, Total=11990 [2022-04-06 20:02:00,688 INFO L87 Difference]: Start difference. First operand 265 states and 315 transitions. Second operand has 56 states, 56 states have (on average 2.017857142857143) internal successors, (113), 54 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:02:01,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:02:01,864 INFO L93 Difference]: Finished difference Result 283 states and 335 transitions. [2022-04-06 20:02:01,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-04-06 20:02:01,865 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.017857142857143) internal successors, (113), 54 states have internal predecessors, (113), 2 states have call successors, (3), 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 117 [2022-04-06 20:02:01,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:02:01,866 INFO L225 Difference]: With dead ends: 283 [2022-04-06 20:02:01,866 INFO L226 Difference]: Without dead ends: 277 [2022-04-06 20:02:01,867 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 181 SyntacticMatches, 1 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2241 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=10838, Invalid=15568, Unknown=0, NotChecked=0, Total=26406 [2022-04-06 20:02:01,867 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 737 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 737 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:02:01,867 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [737 Valid, 45 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [277 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:02:01,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-04-06 20:02:01,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 270. [2022-04-06 20:02:01,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 265 states have (on average 1.1962264150943396) internal successors, (317), 265 states have internal predecessors, (317), 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) [2022-04-06 20:02:01,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 321 transitions. [2022-04-06 20:02:01,955 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 321 transitions. Word has length 117 [2022-04-06 20:02:01,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:02:01,955 INFO L478 AbstractCegarLoop]: Abstraction has 270 states and 321 transitions. [2022-04-06 20:02:01,955 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.017857142857143) internal successors, (113), 54 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:02:01,956 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 321 transitions. [2022-04-06 20:02:01,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-04-06 20:02:01,956 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:02:01,956 INFO L499 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:02:01,972 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-04-06 20:02:02,172 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-04-06 20:02:02,172 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:02:02,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:02:02,173 INFO L85 PathProgramCache]: Analyzing trace with hash -167902598, now seen corresponding path program 101 times [2022-04-06 20:02:02,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:02:02,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [579508318] [2022-04-06 20:02:02,173 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:02:02,173 INFO L85 PathProgramCache]: Analyzing trace with hash -167902598, now seen corresponding path program 102 times [2022-04-06 20:02:02,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:02:02,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125762378] [2022-04-06 20:02:02,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:02:02,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:02:02,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:02:03,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:02:03,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:02:03,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:02:03,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:02:03,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125762378] [2022-04-06 20:02:03,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125762378] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:02:03,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405658879] [2022-04-06 20:02:03,116 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:02:03,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:02:03,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:02:03,117 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:02:03,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-04-06 20:02:03,207 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) [2022-04-06 20:02:03,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:02:03,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-06 20:02:03,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:02:03,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:02:03,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:02:06,124 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:02:06,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405658879] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:02:06,125 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:02:06,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 56, 56] total 112 [2022-04-06 20:02:06,125 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:02:06,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [579508318] [2022-04-06 20:02:06,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [579508318] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:02:06,125 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:02:06,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-04-06 20:02:06,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740960572] [2022-04-06 20:02:06,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:02:06,125 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-04-06 20:02:06,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:02:06,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-04-06 20:02:06,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5683, Invalid=6749, Unknown=0, NotChecked=0, Total=12432 [2022-04-06 20:02:06,127 INFO L87 Difference]: Start difference. First operand 270 states and 321 transitions. Second operand has 57 states, 57 states have (on average 2.017543859649123) internal successors, (115), 55 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:02:07,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:02:07,897 INFO L93 Difference]: Finished difference Result 288 states and 341 transitions. [2022-04-06 20:02:07,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-04-06 20:02:07,897 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.017543859649123) internal successors, (115), 55 states have internal predecessors, (115), 2 states have call successors, (3), 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 119 [2022-04-06 20:02:07,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:02:07,898 INFO L225 Difference]: With dead ends: 288 [2022-04-06 20:02:07,898 INFO L226 Difference]: Without dead ends: 282 [2022-04-06 20:02:07,899 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 184 SyntacticMatches, 1 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2311 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=11258, Invalid=16132, Unknown=0, NotChecked=0, Total=27390 [2022-04-06 20:02:07,899 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 765 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 287 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 765 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:02:07,899 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [765 Valid, 45 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:02:07,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-04-06 20:02:07,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 275. [2022-04-06 20:02:07,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 270 states have (on average 1.1962962962962962) internal successors, (323), 270 states have internal predecessors, (323), 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) [2022-04-06 20:02:07,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 327 transitions. [2022-04-06 20:02:07,996 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 327 transitions. Word has length 119 [2022-04-06 20:02:07,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:02:07,996 INFO L478 AbstractCegarLoop]: Abstraction has 275 states and 327 transitions. [2022-04-06 20:02:07,997 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.017543859649123) internal successors, (115), 55 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:02:07,997 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 327 transitions. [2022-04-06 20:02:07,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-04-06 20:02:07,997 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:02:07,997 INFO L499 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:02:08,014 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-04-06 20:02:08,213 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:02:08,213 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:02:08,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:02:08,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1495864757, now seen corresponding path program 103 times [2022-04-06 20:02:08,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:02:08,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [833518532] [2022-04-06 20:02:08,214 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:02:08,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1495864757, now seen corresponding path program 104 times [2022-04-06 20:02:08,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:02:08,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811439026] [2022-04-06 20:02:08,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:02:08,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:02:08,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:02:09,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:02:09,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:02:09,064 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:02:09,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:02:09,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811439026] [2022-04-06 20:02:09,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811439026] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:02:09,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680559371] [2022-04-06 20:02:09,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:02:09,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:02:09,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:02:09,066 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:02:09,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-04-06 20:02:09,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:02:09,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:02:09,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 56 conjunts are in the unsatisfiable core [2022-04-06 20:02:09,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:02:09,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:02:09,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:02:12,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:02:12,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680559371] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:02:12,105 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:02:12,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 57, 57] total 114 [2022-04-06 20:02:12,105 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:02:12,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [833518532] [2022-04-06 20:02:12,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [833518532] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:02:12,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:02:12,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-04-06 20:02:12,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896266269] [2022-04-06 20:02:12,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:02:12,106 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-04-06 20:02:12,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:02:12,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-04-06 20:02:12,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5898, Invalid=6984, Unknown=0, NotChecked=0, Total=12882 [2022-04-06 20:02:12,107 INFO L87 Difference]: Start difference. First operand 275 states and 327 transitions. Second operand has 58 states, 58 states have (on average 2.0172413793103448) internal successors, (117), 56 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:02:13,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:02:13,405 INFO L93 Difference]: Finished difference Result 293 states and 347 transitions. [2022-04-06 20:02:13,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-04-06 20:02:13,406 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.0172413793103448) internal successors, (117), 56 states have internal predecessors, (117), 2 states have call successors, (3), 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 121 [2022-04-06 20:02:13,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:02:13,407 INFO L225 Difference]: With dead ends: 293 [2022-04-06 20:02:13,407 INFO L226 Difference]: Without dead ends: 287 [2022-04-06 20:02:13,408 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 187 SyntacticMatches, 1 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2382 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=11686, Invalid=16706, Unknown=0, NotChecked=0, Total=28392 [2022-04-06 20:02:13,408 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 772 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 290 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 772 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 290 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:02:13,408 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [772 Valid, 45 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [290 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:02:13,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-04-06 20:02:13,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 280. [2022-04-06 20:02:13,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 275 states have (on average 1.1963636363636363) internal successors, (329), 275 states have internal predecessors, (329), 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) [2022-04-06 20:02:13,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 333 transitions. [2022-04-06 20:02:13,509 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 333 transitions. Word has length 121 [2022-04-06 20:02:13,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:02:13,509 INFO L478 AbstractCegarLoop]: Abstraction has 280 states and 333 transitions. [2022-04-06 20:02:13,509 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.0172413793103448) internal successors, (117), 56 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:02:13,509 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 333 transitions. [2022-04-06 20:02:13,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-04-06 20:02:13,510 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:02:13,510 INFO L499 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:02:13,526 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-04-06 20:02:13,723 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-04-06 20:02:13,723 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:02:13,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:02:13,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1646508496, now seen corresponding path program 105 times [2022-04-06 20:02:13,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:02:13,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2118761826] [2022-04-06 20:02:13,724 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:02:13,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1646508496, now seen corresponding path program 106 times [2022-04-06 20:02:13,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:02:13,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147027558] [2022-04-06 20:02:13,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:02:13,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:02:13,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:02:14,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:02:14,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:02:14,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:02:14,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:02:14,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147027558] [2022-04-06 20:02:14,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147027558] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:02:14,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932142323] [2022-04-06 20:02:14,306 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:02:14,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:02:14,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:02:14,308 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:02:14,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-04-06 20:02:14,373 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:02:14,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:02:14,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 57 conjunts are in the unsatisfiable core [2022-04-06 20:02:14,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:02:14,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:02:14,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:02:16,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:02:16,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932142323] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:02:16,210 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:02:16,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 58, 58] total 116 [2022-04-06 20:02:16,210 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:02:16,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2118761826] [2022-04-06 20:02:16,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2118761826] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:02:16,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:02:16,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-04-06 20:02:16,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115614247] [2022-04-06 20:02:16,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:02:16,211 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-04-06 20:02:16,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:02:16,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-04-06 20:02:16,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6117, Invalid=7223, Unknown=0, NotChecked=0, Total=13340 [2022-04-06 20:02:16,212 INFO L87 Difference]: Start difference. First operand 280 states and 333 transitions. Second operand has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 57 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:02:17,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:02:17,449 INFO L93 Difference]: Finished difference Result 298 states and 353 transitions. [2022-04-06 20:02:17,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-04-06 20:02:17,450 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 57 states have internal predecessors, (119), 2 states have call successors, (3), 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 123 [2022-04-06 20:02:17,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:02:17,451 INFO L225 Difference]: With dead ends: 298 [2022-04-06 20:02:17,451 INFO L226 Difference]: Without dead ends: 292 [2022-04-06 20:02:17,452 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 190 SyntacticMatches, 1 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2454 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=12122, Invalid=17290, Unknown=0, NotChecked=0, Total=29412 [2022-04-06 20:02:17,452 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 743 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 281 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 743 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 281 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:02:17,453 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [743 Valid, 55 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [281 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:02:17,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2022-04-06 20:02:17,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 285. [2022-04-06 20:02:17,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 280 states have (on average 1.1964285714285714) internal successors, (335), 280 states have internal predecessors, (335), 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) [2022-04-06 20:02:17,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 339 transitions. [2022-04-06 20:02:17,557 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 339 transitions. Word has length 123 [2022-04-06 20:02:17,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:02:17,558 INFO L478 AbstractCegarLoop]: Abstraction has 285 states and 339 transitions. [2022-04-06 20:02:17,558 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 57 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:02:17,558 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 339 transitions. [2022-04-06 20:02:17,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-04-06 20:02:17,558 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:02:17,558 INFO L499 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:02:17,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-04-06 20:02:17,760 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-04-06 20:02:17,760 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:02:17,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:02:17,760 INFO L85 PathProgramCache]: Analyzing trace with hash -2105195541, now seen corresponding path program 107 times [2022-04-06 20:02:17,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:02:17,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1325970649] [2022-04-06 20:02:17,761 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:02:17,761 INFO L85 PathProgramCache]: Analyzing trace with hash -2105195541, now seen corresponding path program 108 times [2022-04-06 20:02:17,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:02:17,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017328363] [2022-04-06 20:02:17,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:02:17,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:02:17,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:02:18,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:02:18,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:02:18,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:02:18,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:02:18,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017328363] [2022-04-06 20:02:18,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017328363] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:02:18,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085332533] [2022-04-06 20:02:18,749 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:02:18,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:02:18,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:02:18,750 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:02:18,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-04-06 20:02:18,841 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2022-04-06 20:02:18,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:02:18,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 58 conjunts are in the unsatisfiable core [2022-04-06 20:02:18,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:02:18,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:02:18,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:02:20,712 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:02:20,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085332533] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:02:20,712 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:02:20,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 59, 59] total 118 [2022-04-06 20:02:20,712 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:02:20,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1325970649] [2022-04-06 20:02:20,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1325970649] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:02:20,713 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:02:20,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-04-06 20:02:20,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898632077] [2022-04-06 20:02:20,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:02:20,713 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-04-06 20:02:20,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:02:20,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-04-06 20:02:20,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6340, Invalid=7466, Unknown=0, NotChecked=0, Total=13806 [2022-04-06 20:02:20,720 INFO L87 Difference]: Start difference. First operand 285 states and 339 transitions. Second operand has 60 states, 60 states have (on average 2.0166666666666666) internal successors, (121), 58 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:02:22,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:02:22,128 INFO L93 Difference]: Finished difference Result 303 states and 359 transitions. [2022-04-06 20:02:22,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-04-06 20:02:22,128 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.0166666666666666) internal successors, (121), 58 states have internal predecessors, (121), 2 states have call successors, (3), 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 125 [2022-04-06 20:02:22,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:02:22,129 INFO L225 Difference]: With dead ends: 303 [2022-04-06 20:02:22,129 INFO L226 Difference]: Without dead ends: 297 [2022-04-06 20:02:22,130 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 193 SyntacticMatches, 1 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2527 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=12566, Invalid=17884, Unknown=0, NotChecked=0, Total=30450 [2022-04-06 20:02:22,130 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 885 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 329 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 885 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 329 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:02:22,134 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [885 Valid, 50 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [329 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:02:22,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-04-06 20:02:22,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 290. [2022-04-06 20:02:22,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 285 states have (on average 1.1964912280701754) internal successors, (341), 285 states have internal predecessors, (341), 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) [2022-04-06 20:02:22,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 345 transitions. [2022-04-06 20:02:22,242 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 345 transitions. Word has length 125 [2022-04-06 20:02:22,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:02:22,242 INFO L478 AbstractCegarLoop]: Abstraction has 290 states and 345 transitions. [2022-04-06 20:02:22,242 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.0166666666666666) internal successors, (121), 58 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:02:22,242 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 345 transitions. [2022-04-06 20:02:22,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-04-06 20:02:22,243 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:02:22,243 INFO L499 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:02:22,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-04-06 20:02:22,459 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:02:22,459 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:02:22,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:02:22,459 INFO L85 PathProgramCache]: Analyzing trace with hash -521814298, now seen corresponding path program 109 times [2022-04-06 20:02:22,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:02:22,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [88737056] [2022-04-06 20:02:22,460 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:02:22,460 INFO L85 PathProgramCache]: Analyzing trace with hash -521814298, now seen corresponding path program 110 times [2022-04-06 20:02:22,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:02:22,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891587580] [2022-04-06 20:02:22,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:02:22,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:02:22,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:02:23,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:02:23,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:02:23,087 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:02:23,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:02:23,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891587580] [2022-04-06 20:02:23,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891587580] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:02:23,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917728634] [2022-04-06 20:02:23,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:02:23,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:02:23,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:02:23,088 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:02:23,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-04-06 20:02:23,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:02:23,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:02:23,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 59 conjunts are in the unsatisfiable core [2022-04-06 20:02:23,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:02:23,372 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:02:23,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:02:25,189 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:02:25,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917728634] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:02:25,190 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:02:25,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 60, 60] total 120 [2022-04-06 20:02:25,190 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:02:25,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [88737056] [2022-04-06 20:02:25,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [88737056] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:02:25,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:02:25,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-04-06 20:02:25,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377843726] [2022-04-06 20:02:25,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:02:25,190 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-04-06 20:02:25,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:02:25,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-04-06 20:02:25,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6567, Invalid=7713, Unknown=0, NotChecked=0, Total=14280 [2022-04-06 20:02:25,192 INFO L87 Difference]: Start difference. First operand 290 states and 345 transitions. Second operand has 61 states, 61 states have (on average 2.0163934426229506) internal successors, (123), 59 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:02:26,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:02:26,512 INFO L93 Difference]: Finished difference Result 308 states and 365 transitions. [2022-04-06 20:02:26,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-04-06 20:02:26,512 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.0163934426229506) internal successors, (123), 59 states have internal predecessors, (123), 2 states have call successors, (3), 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 127 [2022-04-06 20:02:26,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:02:26,513 INFO L225 Difference]: With dead ends: 308 [2022-04-06 20:02:26,513 INFO L226 Difference]: Without dead ends: 302 [2022-04-06 20:02:26,514 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 196 SyntacticMatches, 1 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2601 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=13018, Invalid=18488, Unknown=0, NotChecked=0, Total=31506 [2022-04-06 20:02:26,514 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 736 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 736 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 280 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:02:26,515 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [736 Valid, 65 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [280 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:02:26,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-04-06 20:02:26,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 295. [2022-04-06 20:02:26,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 290 states have (on average 1.196551724137931) internal successors, (347), 290 states have internal predecessors, (347), 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) [2022-04-06 20:02:26,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 351 transitions. [2022-04-06 20:02:26,627 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 351 transitions. Word has length 127 [2022-04-06 20:02:26,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:02:26,627 INFO L478 AbstractCegarLoop]: Abstraction has 295 states and 351 transitions. [2022-04-06 20:02:26,627 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.0163934426229506) internal successors, (123), 59 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:02:26,627 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 351 transitions. [2022-04-06 20:02:26,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-04-06 20:02:26,628 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:02:26,628 INFO L499 BasicCegarLoop]: trace histogram [57, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:02:26,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-04-06 20:02:26,844 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:02:26,844 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:02:26,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:02:26,844 INFO L85 PathProgramCache]: Analyzing trace with hash 689137441, now seen corresponding path program 111 times [2022-04-06 20:02:26,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:02:26,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [777108969] [2022-04-06 20:02:26,845 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:02:26,845 INFO L85 PathProgramCache]: Analyzing trace with hash 689137441, now seen corresponding path program 112 times [2022-04-06 20:02:26,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:02:26,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825423337] [2022-04-06 20:02:26,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:02:26,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:02:26,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:02:27,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:02:27,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:02:27,679 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:02:27,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:02:27,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825423337] [2022-04-06 20:02:27,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825423337] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:02:27,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989552900] [2022-04-06 20:02:27,679 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:02:27,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:02:27,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:02:27,681 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:02:27,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-04-06 20:02:27,766 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:02:27,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:02:27,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 60 conjunts are in the unsatisfiable core [2022-04-06 20:02:27,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:02:27,923 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:02:27,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:02:29,766 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:02:29,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989552900] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:02:29,766 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:02:29,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 61, 61] total 122 [2022-04-06 20:02:29,766 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:02:29,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [777108969] [2022-04-06 20:02:29,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [777108969] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:02:29,767 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:02:29,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-04-06 20:02:29,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708557206] [2022-04-06 20:02:29,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:02:29,767 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-04-06 20:02:29,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:02:29,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-04-06 20:02:29,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6798, Invalid=7964, Unknown=0, NotChecked=0, Total=14762 [2022-04-06 20:02:29,768 INFO L87 Difference]: Start difference. First operand 295 states and 351 transitions. Second operand has 62 states, 62 states have (on average 2.0161290322580645) internal successors, (125), 60 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:02:31,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:02:31,152 INFO L93 Difference]: Finished difference Result 313 states and 371 transitions. [2022-04-06 20:02:31,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-04-06 20:02:31,153 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.0161290322580645) internal successors, (125), 60 states have internal predecessors, (125), 2 states have call successors, (3), 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 129 [2022-04-06 20:02:31,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:02:31,154 INFO L225 Difference]: With dead ends: 313 [2022-04-06 20:02:31,154 INFO L226 Difference]: Without dead ends: 307 [2022-04-06 20:02:31,155 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 199 SyntacticMatches, 1 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2676 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=13478, Invalid=19102, Unknown=0, NotChecked=0, Total=32580 [2022-04-06 20:02:31,155 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 878 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 328 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 878 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 328 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:02:31,155 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [878 Valid, 45 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [328 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:02:31,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2022-04-06 20:02:31,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 300. [2022-04-06 20:02:31,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 295 states have (on average 1.1966101694915254) internal successors, (353), 295 states have internal predecessors, (353), 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) [2022-04-06 20:02:31,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 357 transitions. [2022-04-06 20:02:31,295 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 357 transitions. Word has length 129 [2022-04-06 20:02:31,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:02:31,296 INFO L478 AbstractCegarLoop]: Abstraction has 300 states and 357 transitions. [2022-04-06 20:02:31,296 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.0161290322580645) internal successors, (125), 60 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:02:31,296 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 357 transitions. [2022-04-06 20:02:31,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-04-06 20:02:31,296 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:02:31,296 INFO L499 BasicCegarLoop]: trace histogram [58, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:02:31,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-04-06 20:02:31,512 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:02:31,513 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:02:31,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:02:31,513 INFO L85 PathProgramCache]: Analyzing trace with hash 477621404, now seen corresponding path program 113 times [2022-04-06 20:02:31,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:02:31,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1326191736] [2022-04-06 20:02:31,520 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:02:31,520 INFO L85 PathProgramCache]: Analyzing trace with hash 477621404, now seen corresponding path program 114 times [2022-04-06 20:02:31,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:02:31,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420521205] [2022-04-06 20:02:31,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:02:31,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:02:31,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:02:32,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:02:32,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:02:32,184 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:02:32,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:02:32,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420521205] [2022-04-06 20:02:32,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420521205] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:02:32,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906237273] [2022-04-06 20:02:32,184 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:02:32,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:02:32,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:02:32,185 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:02:32,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-04-06 20:02:32,287 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 58 check-sat command(s) [2022-04-06 20:02:32,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:02:32,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 61 conjunts are in the unsatisfiable core [2022-04-06 20:02:32,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:02:32,426 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:02:32,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:02:34,311 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:02:34,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906237273] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:02:34,312 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:02:34,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 62, 62] total 124 [2022-04-06 20:02:34,312 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:02:34,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1326191736] [2022-04-06 20:02:34,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1326191736] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:02:34,312 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:02:34,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-04-06 20:02:34,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882091688] [2022-04-06 20:02:34,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:02:34,312 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-04-06 20:02:34,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:02:34,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-04-06 20:02:34,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7033, Invalid=8219, Unknown=0, NotChecked=0, Total=15252 [2022-04-06 20:02:34,314 INFO L87 Difference]: Start difference. First operand 300 states and 357 transitions. Second operand has 63 states, 63 states have (on average 2.015873015873016) internal successors, (127), 61 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:02:35,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:02:35,750 INFO L93 Difference]: Finished difference Result 318 states and 377 transitions. [2022-04-06 20:02:35,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-04-06 20:02:35,750 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.015873015873016) internal successors, (127), 61 states have internal predecessors, (127), 2 states have call successors, (3), 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 131 [2022-04-06 20:02:35,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:02:35,751 INFO L225 Difference]: With dead ends: 318 [2022-04-06 20:02:35,751 INFO L226 Difference]: Without dead ends: 312 [2022-04-06 20:02:35,753 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 202 SyntacticMatches, 1 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2752 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=13946, Invalid=19726, Unknown=0, NotChecked=0, Total=33672 [2022-04-06 20:02:35,753 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 870 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 326 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 870 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 326 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:02:35,753 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [870 Valid, 55 Invalid, 751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [326 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:02:35,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-04-06 20:02:35,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 305. [2022-04-06 20:02:35,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 300 states have (on average 1.1966666666666668) internal successors, (359), 300 states have internal predecessors, (359), 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) [2022-04-06 20:02:35,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 363 transitions. [2022-04-06 20:02:35,883 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 363 transitions. Word has length 131 [2022-04-06 20:02:35,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:02:35,884 INFO L478 AbstractCegarLoop]: Abstraction has 305 states and 363 transitions. [2022-04-06 20:02:35,884 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.015873015873016) internal successors, (127), 61 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:02:35,884 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 363 transitions. [2022-04-06 20:02:35,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-04-06 20:02:35,884 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:02:35,884 INFO L499 BasicCegarLoop]: trace histogram [59, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:02:35,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-04-06 20:02:36,100 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-04-06 20:02:36,101 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:02:36,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:02:36,101 INFO L85 PathProgramCache]: Analyzing trace with hash -925827241, now seen corresponding path program 115 times [2022-04-06 20:02:36,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:02:36,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [156429917] [2022-04-06 20:02:36,101 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:02:36,101 INFO L85 PathProgramCache]: Analyzing trace with hash -925827241, now seen corresponding path program 116 times [2022-04-06 20:02:36,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:02:36,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683799042] [2022-04-06 20:02:36,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:02:36,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:02:36,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:02:36,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:02:36,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:02:36,817 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:02:36,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:02:36,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683799042] [2022-04-06 20:02:36,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683799042] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:02:36,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117075339] [2022-04-06 20:02:36,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:02:36,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:02:36,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:02:36,818 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:02:36,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-04-06 20:02:36,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:02:36,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:02:36,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 62 conjunts are in the unsatisfiable core [2022-04-06 20:02:36,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:02:37,040 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:02:37,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:02:38,990 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:02:38,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117075339] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:02:38,991 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:02:38,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 63, 63] total 126 [2022-04-06 20:02:38,991 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:02:38,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [156429917] [2022-04-06 20:02:38,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [156429917] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:02:38,991 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:02:38,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-04-06 20:02:38,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732057471] [2022-04-06 20:02:38,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:02:38,991 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-04-06 20:02:38,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:02:38,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-04-06 20:02:38,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7272, Invalid=8478, Unknown=0, NotChecked=0, Total=15750 [2022-04-06 20:02:38,993 INFO L87 Difference]: Start difference. First operand 305 states and 363 transitions. Second operand has 64 states, 64 states have (on average 2.015625) internal successors, (129), 62 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:02:40,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:02:40,515 INFO L93 Difference]: Finished difference Result 323 states and 383 transitions. [2022-04-06 20:02:40,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-04-06 20:02:40,516 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.015625) internal successors, (129), 62 states have internal predecessors, (129), 2 states have call successors, (3), 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 133 [2022-04-06 20:02:40,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:02:40,517 INFO L225 Difference]: With dead ends: 323 [2022-04-06 20:02:40,517 INFO L226 Difference]: Without dead ends: 317 [2022-04-06 20:02:40,518 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 205 SyntacticMatches, 1 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2829 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=14422, Invalid=20360, Unknown=0, NotChecked=0, Total=34782 [2022-04-06 20:02:40,519 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1057 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 389 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1057 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 389 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:02:40,519 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1057 Valid, 60 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [389 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:02:40,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-04-06 20:02:40,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 310. [2022-04-06 20:02:40,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 305 states have (on average 1.1967213114754098) internal successors, (365), 305 states have internal predecessors, (365), 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) [2022-04-06 20:02:40,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 369 transitions. [2022-04-06 20:02:40,666 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 369 transitions. Word has length 133 [2022-04-06 20:02:40,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:02:40,666 INFO L478 AbstractCegarLoop]: Abstraction has 310 states and 369 transitions. [2022-04-06 20:02:40,667 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.015625) internal successors, (129), 62 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:02:40,667 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 369 transitions. [2022-04-06 20:02:40,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-04-06 20:02:40,667 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:02:40,667 INFO L499 BasicCegarLoop]: trace histogram [60, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:02:40,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-04-06 20:02:40,883 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-04-06 20:02:40,883 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:02:40,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:02:40,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1020244142, now seen corresponding path program 117 times [2022-04-06 20:02:40,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:02:40,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1029009619] [2022-04-06 20:02:40,884 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:02:40,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1020244142, now seen corresponding path program 118 times [2022-04-06 20:02:40,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:02:40,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353493364] [2022-04-06 20:02:40,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:02:40,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:02:40,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:02:41,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:02:41,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:02:41,834 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:02:41,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:02:41,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353493364] [2022-04-06 20:02:41,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353493364] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:02:41,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411337138] [2022-04-06 20:02:41,834 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:02:41,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:02:41,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:02:41,835 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:02:41,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-04-06 20:02:41,895 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:02:41,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:02:41,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 63 conjunts are in the unsatisfiable core [2022-04-06 20:02:41,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:02:42,035 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:02:42,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:02:44,057 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:02:44,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411337138] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:02:44,057 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:02:44,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 64, 64] total 128 [2022-04-06 20:02:44,058 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:02:44,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1029009619] [2022-04-06 20:02:44,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1029009619] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:02:44,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:02:44,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-04-06 20:02:44,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92931724] [2022-04-06 20:02:44,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:02:44,058 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-04-06 20:02:44,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:02:44,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-04-06 20:02:44,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7515, Invalid=8741, Unknown=0, NotChecked=0, Total=16256 [2022-04-06 20:02:44,060 INFO L87 Difference]: Start difference. First operand 310 states and 369 transitions. Second operand has 65 states, 65 states have (on average 2.0153846153846153) internal successors, (131), 63 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:02:45,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:02:45,609 INFO L93 Difference]: Finished difference Result 328 states and 389 transitions. [2022-04-06 20:02:45,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-04-06 20:02:45,609 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.0153846153846153) internal successors, (131), 63 states have internal predecessors, (131), 2 states have call successors, (3), 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 135 [2022-04-06 20:02:45,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:02:45,610 INFO L225 Difference]: With dead ends: 328 [2022-04-06 20:02:45,610 INFO L226 Difference]: Without dead ends: 322 [2022-04-06 20:02:45,612 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 208 SyntacticMatches, 1 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2907 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=14906, Invalid=21004, Unknown=0, NotChecked=0, Total=35910 [2022-04-06 20:02:45,612 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 824 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 312 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 824 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 312 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:02:45,612 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [824 Valid, 45 Invalid, 737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [312 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:02:45,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2022-04-06 20:02:45,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 315. [2022-04-06 20:02:45,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 310 states have (on average 1.196774193548387) internal successors, (371), 310 states have internal predecessors, (371), 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) [2022-04-06 20:02:45,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 375 transitions. [2022-04-06 20:02:45,733 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 375 transitions. Word has length 135 [2022-04-06 20:02:45,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:02:45,733 INFO L478 AbstractCegarLoop]: Abstraction has 315 states and 375 transitions. [2022-04-06 20:02:45,733 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.0153846153846153) internal successors, (131), 63 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:02:45,733 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 375 transitions. [2022-04-06 20:02:45,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-04-06 20:02:45,734 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:02:45,734 INFO L499 BasicCegarLoop]: trace histogram [61, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:02:45,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-04-06 20:02:45,941 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:02:45,941 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:02:45,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:02:45,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1560572787, now seen corresponding path program 119 times [2022-04-06 20:02:45,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:02:45,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1963544230] [2022-04-06 20:02:45,942 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:02:45,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1560572787, now seen corresponding path program 120 times [2022-04-06 20:02:45,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:02:45,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638398187] [2022-04-06 20:02:45,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:02:45,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:02:45,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:02:46,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:02:46,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:02:46,821 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:02:46,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:02:46,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638398187] [2022-04-06 20:02:46,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638398187] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:02:46,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962223382] [2022-04-06 20:02:46,821 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:02:46,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:02:46,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:02:46,823 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:02:46,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-04-06 20:02:46,930 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2022-04-06 20:02:46,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:02:46,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 64 conjunts are in the unsatisfiable core [2022-04-06 20:02:46,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:02:47,164 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:02:47,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:02:50,795 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:02:50,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962223382] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:02:50,796 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:02:50,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 65, 65] total 130 [2022-04-06 20:02:50,796 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:02:50,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1963544230] [2022-04-06 20:02:50,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1963544230] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:02:50,796 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:02:50,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-04-06 20:02:50,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156742182] [2022-04-06 20:02:50,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:02:50,797 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-04-06 20:02:50,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:02:50,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-04-06 20:02:50,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7762, Invalid=9008, Unknown=0, NotChecked=0, Total=16770 [2022-04-06 20:02:50,798 INFO L87 Difference]: Start difference. First operand 315 states and 375 transitions. Second operand has 66 states, 66 states have (on average 2.015151515151515) internal successors, (133), 64 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:02:53,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:02:53,083 INFO L93 Difference]: Finished difference Result 333 states and 395 transitions. [2022-04-06 20:02:53,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-04-06 20:02:53,083 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.015151515151515) internal successors, (133), 64 states have internal predecessors, (133), 2 states have call successors, (3), 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 137 [2022-04-06 20:02:53,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:02:53,084 INFO L225 Difference]: With dead ends: 333 [2022-04-06 20:02:53,084 INFO L226 Difference]: Without dead ends: 327 [2022-04-06 20:02:53,093 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 211 SyntacticMatches, 1 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2986 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=15398, Invalid=21658, Unknown=0, NotChecked=0, Total=37056 [2022-04-06 20:02:53,094 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 855 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 323 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 855 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 323 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:02:53,094 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [855 Valid, 45 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [323 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:02:53,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-04-06 20:02:53,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 320. [2022-04-06 20:02:53,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 315 states have (on average 1.1968253968253968) internal successors, (377), 315 states have internal predecessors, (377), 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) [2022-04-06 20:02:53,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 381 transitions. [2022-04-06 20:02:53,219 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 381 transitions. Word has length 137 [2022-04-06 20:02:53,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:02:53,219 INFO L478 AbstractCegarLoop]: Abstraction has 320 states and 381 transitions. [2022-04-06 20:02:53,219 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.015151515151515) internal successors, (133), 64 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:02:53,220 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 381 transitions. [2022-04-06 20:02:53,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-04-06 20:02:53,220 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:02:53,220 INFO L499 BasicCegarLoop]: trace histogram [62, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:02:53,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-04-06 20:02:53,434 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:02:53,434 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:02:53,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:02:53,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1125357816, now seen corresponding path program 121 times [2022-04-06 20:02:53,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:02:53,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1529966530] [2022-04-06 20:02:53,435 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:02:53,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1125357816, now seen corresponding path program 122 times [2022-04-06 20:02:53,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:02:53,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870848336] [2022-04-06 20:02:53,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:02:53,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:02:53,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:02:54,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:02:54,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:02:54,178 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:02:54,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:02:54,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870848336] [2022-04-06 20:02:54,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870848336] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:02:54,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916120675] [2022-04-06 20:02:54,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:02:54,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:02:54,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:02:54,180 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:02:54,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-04-06 20:02:54,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:02:54,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:02:54,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 65 conjunts are in the unsatisfiable core [2022-04-06 20:02:54,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:02:54,552 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:02:54,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:02:56,965 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:02:56,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916120675] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:02:56,965 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:02:56,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 66, 66] total 132 [2022-04-06 20:02:56,965 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:02:56,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1529966530] [2022-04-06 20:02:56,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1529966530] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:02:56,965 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:02:56,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-04-06 20:02:56,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995282776] [2022-04-06 20:02:56,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:02:56,966 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-04-06 20:02:56,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:02:56,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-04-06 20:02:56,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8013, Invalid=9279, Unknown=0, NotChecked=0, Total=17292 [2022-04-06 20:02:56,968 INFO L87 Difference]: Start difference. First operand 320 states and 381 transitions. Second operand has 67 states, 67 states have (on average 2.014925373134328) internal successors, (135), 65 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:02:58,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:02:58,652 INFO L93 Difference]: Finished difference Result 338 states and 401 transitions. [2022-04-06 20:02:58,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-04-06 20:02:58,652 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.014925373134328) internal successors, (135), 65 states have internal predecessors, (135), 2 states have call successors, (3), 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 139 [2022-04-06 20:02:58,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:02:58,653 INFO L225 Difference]: With dead ends: 338 [2022-04-06 20:02:58,653 INFO L226 Difference]: Without dead ends: 332 [2022-04-06 20:02:58,656 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 214 SyntacticMatches, 1 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3066 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=15898, Invalid=22322, Unknown=0, NotChecked=0, Total=38220 [2022-04-06 20:02:58,656 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 895 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 337 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 895 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 337 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:02:58,656 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [895 Valid, 35 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [337 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:02:58,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-04-06 20:02:58,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 325. [2022-04-06 20:02:58,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 320 states have (on average 1.196875) internal successors, (383), 320 states have internal predecessors, (383), 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) [2022-04-06 20:02:58,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 387 transitions. [2022-04-06 20:02:58,825 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 387 transitions. Word has length 139 [2022-04-06 20:02:58,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:02:58,825 INFO L478 AbstractCegarLoop]: Abstraction has 325 states and 387 transitions. [2022-04-06 20:02:58,825 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.014925373134328) internal successors, (135), 65 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:02:58,825 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 387 transitions. [2022-04-06 20:02:58,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-04-06 20:02:58,825 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:02:58,825 INFO L499 BasicCegarLoop]: trace histogram [63, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:02:58,842 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-04-06 20:02:59,041 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:02:59,042 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:02:59,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:02:59,042 INFO L85 PathProgramCache]: Analyzing trace with hash 504401603, now seen corresponding path program 123 times [2022-04-06 20:02:59,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:02:59,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1112072359] [2022-04-06 20:02:59,043 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:02:59,043 INFO L85 PathProgramCache]: Analyzing trace with hash 504401603, now seen corresponding path program 124 times [2022-04-06 20:02:59,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:02:59,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847774418] [2022-04-06 20:02:59,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:02:59,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:02:59,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:03:00,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:03:00,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:03:00,367 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:03:00,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:03:00,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847774418] [2022-04-06 20:03:00,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847774418] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:03:00,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257566792] [2022-04-06 20:03:00,367 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:03:00,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:03:00,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:03:00,368 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:03:00,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-04-06 20:03:00,442 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:03:00,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:03:00,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 66 conjunts are in the unsatisfiable core [2022-04-06 20:03:00,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:03:00,733 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:03:00,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:03:03,706 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:03:03,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257566792] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:03:03,706 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:03:03,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 67, 67] total 134 [2022-04-06 20:03:03,706 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:03:03,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1112072359] [2022-04-06 20:03:03,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1112072359] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:03:03,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:03:03,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-04-06 20:03:03,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341060027] [2022-04-06 20:03:03,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:03:03,707 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-04-06 20:03:03,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:03:03,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-04-06 20:03:03,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8268, Invalid=9554, Unknown=0, NotChecked=0, Total=17822 [2022-04-06 20:03:03,709 INFO L87 Difference]: Start difference. First operand 325 states and 387 transitions. Second operand has 68 states, 68 states have (on average 2.014705882352941) internal successors, (137), 66 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:03:05,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:03:05,424 INFO L93 Difference]: Finished difference Result 343 states and 407 transitions. [2022-04-06 20:03:05,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-04-06 20:03:05,425 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.014705882352941) internal successors, (137), 66 states have internal predecessors, (137), 2 states have call successors, (3), 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 141 [2022-04-06 20:03:05,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:03:05,426 INFO L225 Difference]: With dead ends: 343 [2022-04-06 20:03:05,426 INFO L226 Difference]: Without dead ends: 337 [2022-04-06 20:03:05,427 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 217 SyntacticMatches, 1 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3147 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=16406, Invalid=22996, Unknown=0, NotChecked=0, Total=39402 [2022-04-06 20:03:05,428 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 914 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 344 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 914 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 344 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:03:05,433 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [914 Valid, 45 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [344 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:03:05,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2022-04-06 20:03:05,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 330. [2022-04-06 20:03:05,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 325 states have (on average 1.196923076923077) internal successors, (389), 325 states have internal predecessors, (389), 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) [2022-04-06 20:03:05,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 393 transitions. [2022-04-06 20:03:05,566 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 393 transitions. Word has length 141 [2022-04-06 20:03:05,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:03:05,566 INFO L478 AbstractCegarLoop]: Abstraction has 330 states and 393 transitions. [2022-04-06 20:03:05,566 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.014705882352941) internal successors, (137), 66 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:03:05,566 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 393 transitions. [2022-04-06 20:03:05,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-04-06 20:03:05,567 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:03:05,567 INFO L499 BasicCegarLoop]: trace histogram [64, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:03:05,583 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-04-06 20:03:05,783 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:03:05,783 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:03:05,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:03:05,783 INFO L85 PathProgramCache]: Analyzing trace with hash -959859778, now seen corresponding path program 125 times [2022-04-06 20:03:05,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:03:05,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2136357863] [2022-04-06 20:03:05,784 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:03:05,784 INFO L85 PathProgramCache]: Analyzing trace with hash -959859778, now seen corresponding path program 126 times [2022-04-06 20:03:05,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:03:05,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022169758] [2022-04-06 20:03:05,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:03:05,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:03:05,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:03:06,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:03:06,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:03:06,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:03:06,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:03:06,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022169758] [2022-04-06 20:03:06,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022169758] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:03:06,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267186508] [2022-04-06 20:03:06,693 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:03:06,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:03:06,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:03:06,695 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:03:06,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-04-06 20:03:06,806 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 64 check-sat command(s) [2022-04-06 20:03:06,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:03:06,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 67 conjunts are in the unsatisfiable core [2022-04-06 20:03:06,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:03:06,993 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:03:06,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:03:09,268 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:03:09,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267186508] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:03:09,268 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:03:09,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 68, 68] total 136 [2022-04-06 20:03:09,278 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:03:09,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2136357863] [2022-04-06 20:03:09,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2136357863] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:03:09,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:03:09,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-04-06 20:03:09,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629516856] [2022-04-06 20:03:09,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:03:09,279 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-04-06 20:03:09,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:03:09,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-04-06 20:03:09,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8527, Invalid=9833, Unknown=0, NotChecked=0, Total=18360 [2022-04-06 20:03:09,281 INFO L87 Difference]: Start difference. First operand 330 states and 393 transitions. Second operand has 69 states, 69 states have (on average 2.0144927536231885) internal successors, (139), 67 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:03:11,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:03:11,036 INFO L93 Difference]: Finished difference Result 348 states and 413 transitions. [2022-04-06 20:03:11,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-04-06 20:03:11,036 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.0144927536231885) internal successors, (139), 67 states have internal predecessors, (139), 2 states have call successors, (3), 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 143 [2022-04-06 20:03:11,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:03:11,037 INFO L225 Difference]: With dead ends: 348 [2022-04-06 20:03:11,037 INFO L226 Difference]: Without dead ends: 342 [2022-04-06 20:03:11,039 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 220 SyntacticMatches, 1 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3229 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=16922, Invalid=23680, Unknown=0, NotChecked=0, Total=40602 [2022-04-06 20:03:11,040 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 897 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 897 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:03:11,040 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [897 Valid, 60 Invalid, 807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [339 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:03:11,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2022-04-06 20:03:11,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 335. [2022-04-06 20:03:11,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 330 states have (on average 1.196969696969697) internal successors, (395), 330 states have internal predecessors, (395), 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) [2022-04-06 20:03:11,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 399 transitions. [2022-04-06 20:03:11,185 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 399 transitions. Word has length 143 [2022-04-06 20:03:11,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:03:11,186 INFO L478 AbstractCegarLoop]: Abstraction has 335 states and 399 transitions. [2022-04-06 20:03:11,186 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.0144927536231885) internal successors, (139), 67 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:03:11,186 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 399 transitions. [2022-04-06 20:03:11,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-04-06 20:03:11,186 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:03:11,186 INFO L499 BasicCegarLoop]: trace histogram [65, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:03:11,202 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-04-06 20:03:11,391 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-04-06 20:03:11,391 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:03:11,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:03:11,392 INFO L85 PathProgramCache]: Analyzing trace with hash 634226169, now seen corresponding path program 127 times [2022-04-06 20:03:11,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:03:11,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2107979420] [2022-04-06 20:03:11,392 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:03:11,392 INFO L85 PathProgramCache]: Analyzing trace with hash 634226169, now seen corresponding path program 128 times [2022-04-06 20:03:11,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:03:11,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961637734] [2022-04-06 20:03:11,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:03:11,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:03:11,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:03:12,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:03:12,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:03:12,594 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:03:12,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:03:12,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961637734] [2022-04-06 20:03:12,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961637734] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:03:12,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537770359] [2022-04-06 20:03:12,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:03:12,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:03:12,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:03:12,596 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:03:12,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-04-06 20:03:12,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:03:12,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:03:12,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 68 conjunts are in the unsatisfiable core [2022-04-06 20:03:12,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:03:12,897 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:03:12,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:03:16,388 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:03:16,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537770359] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:03:16,389 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:03:16,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 69, 69] total 138 [2022-04-06 20:03:16,389 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:03:16,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2107979420] [2022-04-06 20:03:16,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2107979420] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:03:16,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:03:16,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-04-06 20:03:16,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993379915] [2022-04-06 20:03:16,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:03:16,390 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-04-06 20:03:16,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:03:16,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-04-06 20:03:16,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8790, Invalid=10116, Unknown=0, NotChecked=0, Total=18906 [2022-04-06 20:03:16,392 INFO L87 Difference]: Start difference. First operand 335 states and 399 transitions. Second operand has 70 states, 70 states have (on average 2.0142857142857142) internal successors, (141), 68 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:03:18,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:03:18,208 INFO L93 Difference]: Finished difference Result 353 states and 419 transitions. [2022-04-06 20:03:18,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-04-06 20:03:18,209 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.0142857142857142) internal successors, (141), 68 states have internal predecessors, (141), 2 states have call successors, (3), 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 145 [2022-04-06 20:03:18,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:03:18,209 INFO L225 Difference]: With dead ends: 353 [2022-04-06 20:03:18,209 INFO L226 Difference]: Without dead ends: 347 [2022-04-06 20:03:18,211 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 223 SyntacticMatches, 1 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3312 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=17446, Invalid=24374, Unknown=0, NotChecked=0, Total=41820 [2022-04-06 20:03:18,211 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 967 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 363 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 967 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 363 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:03:18,211 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [967 Valid, 50 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [363 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:03:18,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-04-06 20:03:18,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 340. [2022-04-06 20:03:18,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 335 states have (on average 1.1970149253731344) internal successors, (401), 335 states have internal predecessors, (401), 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) [2022-04-06 20:03:18,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 405 transitions. [2022-04-06 20:03:18,353 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 405 transitions. Word has length 145 [2022-04-06 20:03:18,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:03:18,353 INFO L478 AbstractCegarLoop]: Abstraction has 340 states and 405 transitions. [2022-04-06 20:03:18,354 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.0142857142857142) internal successors, (141), 68 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:03:18,354 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 405 transitions. [2022-04-06 20:03:18,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-04-06 20:03:18,354 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:03:18,354 INFO L499 BasicCegarLoop]: trace histogram [66, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:03:18,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-04-06 20:03:18,570 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:03:18,570 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:03:18,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:03:18,570 INFO L85 PathProgramCache]: Analyzing trace with hash -752503436, now seen corresponding path program 129 times [2022-04-06 20:03:18,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:03:18,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [790588013] [2022-04-06 20:03:18,571 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:03:18,571 INFO L85 PathProgramCache]: Analyzing trace with hash -752503436, now seen corresponding path program 130 times [2022-04-06 20:03:18,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:03:18,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609959632] [2022-04-06 20:03:18,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:03:18,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:03:18,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:03:19,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:03:19,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:03:19,402 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:03:19,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:03:19,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609959632] [2022-04-06 20:03:19,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609959632] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:03:19,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878605776] [2022-04-06 20:03:19,403 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:03:19,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:03:19,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:03:19,411 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:03:19,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-04-06 20:03:19,500 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:03:19,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:03:19,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 69 conjunts are in the unsatisfiable core [2022-04-06 20:03:19,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:03:19,647 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:03:19,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:03:22,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:03:22,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878605776] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:03:22,072 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:03:22,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 70, 70] total 140 [2022-04-06 20:03:22,073 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:03:22,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [790588013] [2022-04-06 20:03:22,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [790588013] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:03:22,073 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:03:22,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-04-06 20:03:22,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273135661] [2022-04-06 20:03:22,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:03:22,073 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-04-06 20:03:22,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:03:22,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-04-06 20:03:22,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9057, Invalid=10403, Unknown=0, NotChecked=0, Total=19460 [2022-04-06 20:03:22,076 INFO L87 Difference]: Start difference. First operand 340 states and 405 transitions. Second operand has 71 states, 71 states have (on average 2.0140845070422535) internal successors, (143), 69 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:03:24,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:03:24,815 INFO L93 Difference]: Finished difference Result 358 states and 425 transitions. [2022-04-06 20:03:24,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-04-06 20:03:24,816 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.0140845070422535) internal successors, (143), 69 states have internal predecessors, (143), 2 states have call successors, (3), 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 147 [2022-04-06 20:03:24,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:03:24,817 INFO L225 Difference]: With dead ends: 358 [2022-04-06 20:03:24,817 INFO L226 Difference]: Without dead ends: 352 [2022-04-06 20:03:24,819 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 226 SyntacticMatches, 1 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3396 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=17978, Invalid=25078, Unknown=0, NotChecked=0, Total=43056 [2022-04-06 20:03:24,820 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1001 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 375 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1001 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 375 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:03:24,820 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1001 Valid, 55 Invalid, 850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [375 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:03:24,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2022-04-06 20:03:24,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 345. [2022-04-06 20:03:24,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 340 states have (on average 1.1970588235294117) internal successors, (407), 340 states have internal predecessors, (407), 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) [2022-04-06 20:03:24,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 411 transitions. [2022-04-06 20:03:24,990 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 411 transitions. Word has length 147 [2022-04-06 20:03:24,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:03:24,990 INFO L478 AbstractCegarLoop]: Abstraction has 345 states and 411 transitions. [2022-04-06 20:03:24,990 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.0140845070422535) internal successors, (143), 69 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:03:24,991 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 411 transitions. [2022-04-06 20:03:24,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-04-06 20:03:24,991 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:03:24,991 INFO L499 BasicCegarLoop]: trace histogram [67, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:03:25,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-04-06 20:03:25,207 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-04-06 20:03:25,207 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:03:25,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:03:25,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1959792081, now seen corresponding path program 131 times [2022-04-06 20:03:25,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:03:25,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [9910297] [2022-04-06 20:03:25,208 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:03:25,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1959792081, now seen corresponding path program 132 times [2022-04-06 20:03:25,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:03:25,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088751902] [2022-04-06 20:03:25,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:03:25,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:03:25,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:03:26,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:03:26,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:03:26,630 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:03:26,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:03:26,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088751902] [2022-04-06 20:03:26,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088751902] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:03:26,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028972630] [2022-04-06 20:03:26,630 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:03:26,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:03:26,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:03:26,631 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:03:26,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-04-06 20:03:26,749 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2022-04-06 20:03:26,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:03:26,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 70 conjunts are in the unsatisfiable core [2022-04-06 20:03:26,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:03:26,927 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:03:26,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:03:29,404 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:03:29,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028972630] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:03:29,405 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:03:29,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 71, 71] total 142 [2022-04-06 20:03:29,405 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:03:29,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [9910297] [2022-04-06 20:03:29,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [9910297] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:03:29,405 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:03:29,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-04-06 20:03:29,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18430372] [2022-04-06 20:03:29,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:03:29,409 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-04-06 20:03:29,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:03:29,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-04-06 20:03:29,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9328, Invalid=10694, Unknown=0, NotChecked=0, Total=20022 [2022-04-06 20:03:29,411 INFO L87 Difference]: Start difference. First operand 345 states and 411 transitions. Second operand has 72 states, 72 states have (on average 2.013888888888889) internal successors, (145), 70 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:03:31,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:03:31,742 INFO L93 Difference]: Finished difference Result 363 states and 431 transitions. [2022-04-06 20:03:31,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-04-06 20:03:31,742 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.013888888888889) internal successors, (145), 70 states have internal predecessors, (145), 2 states have call successors, (3), 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 149 [2022-04-06 20:03:31,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:03:31,743 INFO L225 Difference]: With dead ends: 363 [2022-04-06 20:03:31,743 INFO L226 Difference]: Without dead ends: 357 [2022-04-06 20:03:31,745 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 229 SyntacticMatches, 1 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3481 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=18518, Invalid=25792, Unknown=0, NotChecked=0, Total=44310 [2022-04-06 20:03:31,745 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1062 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 396 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1062 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 396 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:03:31,746 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1062 Valid, 40 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [396 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:03:31,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2022-04-06 20:03:31,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 350. [2022-04-06 20:03:31,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 345 states have (on average 1.1971014492753622) internal successors, (413), 345 states have internal predecessors, (413), 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) [2022-04-06 20:03:31,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 417 transitions. [2022-04-06 20:03:31,904 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 417 transitions. Word has length 149 [2022-04-06 20:03:31,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:03:31,904 INFO L478 AbstractCegarLoop]: Abstraction has 350 states and 417 transitions. [2022-04-06 20:03:31,904 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.013888888888889) internal successors, (145), 70 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:03:31,904 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 417 transitions. [2022-04-06 20:03:31,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-04-06 20:03:31,905 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:03:31,905 INFO L499 BasicCegarLoop]: trace histogram [68, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:03:31,921 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-04-06 20:03:32,112 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-04-06 20:03:32,112 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:03:32,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:03:32,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1771957290, now seen corresponding path program 133 times [2022-04-06 20:03:32,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:03:32,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1413378279] [2022-04-06 20:03:32,113 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:03:32,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1771957290, now seen corresponding path program 134 times [2022-04-06 20:03:32,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:03:32,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121749301] [2022-04-06 20:03:32,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:03:32,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:03:32,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:03:33,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:03:33,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:03:33,305 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:03:33,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:03:33,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121749301] [2022-04-06 20:03:33,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121749301] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:03:33,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055015396] [2022-04-06 20:03:33,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:03:33,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:03:33,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:03:33,307 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:03:33,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-04-06 20:03:33,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:03:33,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:03:33,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 71 conjunts are in the unsatisfiable core [2022-04-06 20:03:33,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:03:33,589 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:03:33,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:03:36,175 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:03:36,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055015396] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:03:36,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:03:36,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 72, 72] total 144 [2022-04-06 20:03:36,180 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:03:36,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1413378279] [2022-04-06 20:03:36,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1413378279] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:03:36,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:03:36,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-04-06 20:03:36,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054768676] [2022-04-06 20:03:36,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:03:36,180 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-04-06 20:03:36,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:03:36,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-04-06 20:03:36,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9603, Invalid=10989, Unknown=0, NotChecked=0, Total=20592 [2022-04-06 20:03:36,182 INFO L87 Difference]: Start difference. First operand 350 states and 417 transitions. Second operand has 73 states, 73 states have (on average 2.0136986301369864) internal successors, (147), 71 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:03:38,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:03:38,183 INFO L93 Difference]: Finished difference Result 368 states and 437 transitions. [2022-04-06 20:03:38,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-04-06 20:03:38,183 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.0136986301369864) internal successors, (147), 71 states have internal predecessors, (147), 2 states have call successors, (3), 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 151 [2022-04-06 20:03:38,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:03:38,184 INFO L225 Difference]: With dead ends: 368 [2022-04-06 20:03:38,184 INFO L226 Difference]: Without dead ends: 362 [2022-04-06 20:03:38,186 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 232 SyntacticMatches, 1 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3567 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=19066, Invalid=26516, Unknown=0, NotChecked=0, Total=45582 [2022-04-06 20:03:38,200 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1042 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 390 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1042 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 390 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:03:38,200 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1042 Valid, 45 Invalid, 865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [390 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:03:38,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-04-06 20:03:38,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 355. [2022-04-06 20:03:38,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 350 states have (on average 1.197142857142857) internal successors, (419), 350 states have internal predecessors, (419), 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) [2022-04-06 20:03:38,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 423 transitions. [2022-04-06 20:03:38,394 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 423 transitions. Word has length 151 [2022-04-06 20:03:38,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:03:38,394 INFO L478 AbstractCegarLoop]: Abstraction has 355 states and 423 transitions. [2022-04-06 20:03:38,394 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.0136986301369864) internal successors, (147), 71 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:03:38,394 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 423 transitions. [2022-04-06 20:03:38,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-04-06 20:03:38,395 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:03:38,395 INFO L499 BasicCegarLoop]: trace histogram [69, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:03:38,411 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-04-06 20:03:38,610 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-04-06 20:03:38,611 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:03:38,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:03:38,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1685410661, now seen corresponding path program 135 times [2022-04-06 20:03:38,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:03:38,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [320483877] [2022-04-06 20:03:38,611 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:03:38,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1685410661, now seen corresponding path program 136 times [2022-04-06 20:03:38,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:03:38,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084756025] [2022-04-06 20:03:38,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:03:38,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:03:38,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:03:40,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:03:40,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:03:40,158 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:03:40,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:03:40,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084756025] [2022-04-06 20:03:40,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084756025] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:03:40,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365870833] [2022-04-06 20:03:40,158 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:03:40,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:03:40,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:03:40,159 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:03:40,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-04-06 20:03:40,244 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:03:40,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:03:40,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 72 conjunts are in the unsatisfiable core [2022-04-06 20:03:40,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:03:40,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:03:40,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:03:43,517 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:03:43,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365870833] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:03:43,517 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:03:43,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 73, 73] total 146 [2022-04-06 20:03:43,518 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:03:43,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [320483877] [2022-04-06 20:03:43,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [320483877] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:03:43,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:03:43,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-04-06 20:03:43,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451133544] [2022-04-06 20:03:43,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:03:43,518 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-04-06 20:03:43,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:03:43,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-04-06 20:03:43,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9882, Invalid=11288, Unknown=0, NotChecked=0, Total=21170 [2022-04-06 20:03:43,520 INFO L87 Difference]: Start difference. First operand 355 states and 423 transitions. Second operand has 74 states, 74 states have (on average 2.0135135135135136) internal successors, (149), 72 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:03:46,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:03:46,172 INFO L93 Difference]: Finished difference Result 373 states and 443 transitions. [2022-04-06 20:03:46,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-04-06 20:03:46,172 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.0135135135135136) internal successors, (149), 72 states have internal predecessors, (149), 2 states have call successors, (3), 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 153 [2022-04-06 20:03:46,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:03:46,173 INFO L225 Difference]: With dead ends: 373 [2022-04-06 20:03:46,173 INFO L226 Difference]: Without dead ends: 367 [2022-04-06 20:03:46,175 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 235 SyntacticMatches, 1 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3654 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=19622, Invalid=27250, Unknown=0, NotChecked=0, Total=46872 [2022-04-06 20:03:46,176 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1484 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 538 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1484 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 538 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:03:46,176 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1484 Valid, 40 Invalid, 1008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [538 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:03:46,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2022-04-06 20:03:46,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 360. [2022-04-06 20:03:46,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 355 states have (on average 1.1971830985915493) internal successors, (425), 355 states have internal predecessors, (425), 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) [2022-04-06 20:03:46,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 429 transitions. [2022-04-06 20:03:46,358 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 429 transitions. Word has length 153 [2022-04-06 20:03:46,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:03:46,359 INFO L478 AbstractCegarLoop]: Abstraction has 360 states and 429 transitions. [2022-04-06 20:03:46,359 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.0135135135135136) internal successors, (149), 72 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:03:46,359 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 429 transitions. [2022-04-06 20:03:46,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-04-06 20:03:46,359 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:03:46,359 INFO L499 BasicCegarLoop]: trace histogram [70, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:03:46,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-04-06 20:03:46,575 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-04-06 20:03:46,575 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:03:46,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:03:46,575 INFO L85 PathProgramCache]: Analyzing trace with hash 118478816, now seen corresponding path program 137 times [2022-04-06 20:03:46,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:03:46,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [227576128] [2022-04-06 20:03:46,576 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:03:46,576 INFO L85 PathProgramCache]: Analyzing trace with hash 118478816, now seen corresponding path program 138 times [2022-04-06 20:03:46,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:03:46,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379796187] [2022-04-06 20:03:46,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:03:46,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:03:46,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:03:47,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:03:47,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:03:47,758 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:03:47,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:03:47,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379796187] [2022-04-06 20:03:47,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379796187] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:03:47,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664702673] [2022-04-06 20:03:47,758 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:03:47,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:03:47,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:03:47,759 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:03:47,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-04-06 20:03:47,881 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 70 check-sat command(s) [2022-04-06 20:03:47,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:03:47,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 73 conjunts are in the unsatisfiable core [2022-04-06 20:03:47,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:03:48,048 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:03:48,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:03:51,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:03:51,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664702673] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:03:51,419 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:03:51,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 74, 74] total 148 [2022-04-06 20:03:51,419 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:03:51,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [227576128] [2022-04-06 20:03:51,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [227576128] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:03:51,419 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:03:51,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-04-06 20:03:51,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002547596] [2022-04-06 20:03:51,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:03:51,419 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-04-06 20:03:51,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:03:51,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-04-06 20:03:51,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10165, Invalid=11591, Unknown=0, NotChecked=0, Total=21756 [2022-04-06 20:03:51,422 INFO L87 Difference]: Start difference. First operand 360 states and 429 transitions. Second operand has 75 states, 75 states have (on average 2.013333333333333) internal successors, (151), 73 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:03:53,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:03:53,558 INFO L93 Difference]: Finished difference Result 378 states and 449 transitions. [2022-04-06 20:03:53,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-04-06 20:03:53,558 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.013333333333333) internal successors, (151), 73 states have internal predecessors, (151), 2 states have call successors, (3), 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 155 [2022-04-06 20:03:53,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:03:53,559 INFO L225 Difference]: With dead ends: 378 [2022-04-06 20:03:53,559 INFO L226 Difference]: Without dead ends: 372 [2022-04-06 20:03:53,562 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 238 SyntacticMatches, 1 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3742 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=20186, Invalid=27994, Unknown=0, NotChecked=0, Total=48180 [2022-04-06 20:03:53,562 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1086 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 406 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1086 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 406 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:03:53,562 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1086 Valid, 60 Invalid, 912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [406 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:03:53,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2022-04-06 20:03:53,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 365. [2022-04-06 20:03:53,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 360 states have (on average 1.1972222222222222) internal successors, (431), 360 states have internal predecessors, (431), 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) [2022-04-06 20:03:53,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 435 transitions. [2022-04-06 20:03:53,752 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 435 transitions. Word has length 155 [2022-04-06 20:03:53,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:03:53,752 INFO L478 AbstractCegarLoop]: Abstraction has 365 states and 435 transitions. [2022-04-06 20:03:53,752 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.013333333333333) internal successors, (151), 73 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:03:53,752 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 435 transitions. [2022-04-06 20:03:53,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-04-06 20:03:53,753 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:03:53,753 INFO L499 BasicCegarLoop]: trace histogram [71, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:03:53,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-04-06 20:03:53,955 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:03:53,955 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:03:53,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:03:53,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1830496667, now seen corresponding path program 139 times [2022-04-06 20:03:53,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:03:53,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [500903764] [2022-04-06 20:03:53,956 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:03:53,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1830496667, now seen corresponding path program 140 times [2022-04-06 20:03:53,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:03:53,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342757223] [2022-04-06 20:03:53,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:03:53,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:03:53,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:03:55,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:03:55,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:03:55,280 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:03:55,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:03:55,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342757223] [2022-04-06 20:03:55,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342757223] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:03:55,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606598085] [2022-04-06 20:03:55,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:03:55,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:03:55,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:03:55,282 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:03:55,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-04-06 20:03:55,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:03:55,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:03:55,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 74 conjunts are in the unsatisfiable core [2022-04-06 20:03:55,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:03:55,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:03:55,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:03:58,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:03:58,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606598085] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:03:58,365 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:03:58,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 75, 75] total 150 [2022-04-06 20:03:58,366 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:03:58,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [500903764] [2022-04-06 20:03:58,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [500903764] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:03:58,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:03:58,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-04-06 20:03:58,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686316997] [2022-04-06 20:03:58,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:03:58,366 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-04-06 20:03:58,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:03:58,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-04-06 20:03:58,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10452, Invalid=11898, Unknown=0, NotChecked=0, Total=22350 [2022-04-06 20:03:58,369 INFO L87 Difference]: Start difference. First operand 365 states and 435 transitions. Second operand has 76 states, 76 states have (on average 2.013157894736842) internal successors, (153), 74 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:04:00,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:04:00,569 INFO L93 Difference]: Finished difference Result 383 states and 455 transitions. [2022-04-06 20:04:00,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-04-06 20:04:00,569 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.013157894736842) internal successors, (153), 74 states have internal predecessors, (153), 2 states have call successors, (3), 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 157 [2022-04-06 20:04:00,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:04:00,570 INFO L225 Difference]: With dead ends: 383 [2022-04-06 20:04:00,570 INFO L226 Difference]: Without dead ends: 377 [2022-04-06 20:04:00,572 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 463 GetRequests, 241 SyntacticMatches, 1 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3831 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=20758, Invalid=28748, Unknown=0, NotChecked=0, Total=49506 [2022-04-06 20:04:00,572 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 976 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 370 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 976 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 370 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:04:00,572 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [976 Valid, 60 Invalid, 880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [370 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:04:00,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-04-06 20:04:00,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 370. [2022-04-06 20:04:00,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 365 states have (on average 1.1972602739726028) internal successors, (437), 365 states have internal predecessors, (437), 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) [2022-04-06 20:04:00,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 441 transitions. [2022-04-06 20:04:00,741 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 441 transitions. Word has length 157 [2022-04-06 20:04:00,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:04:00,742 INFO L478 AbstractCegarLoop]: Abstraction has 370 states and 441 transitions. [2022-04-06 20:04:00,742 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.013157894736842) internal successors, (153), 74 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:04:00,742 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 441 transitions. [2022-04-06 20:04:00,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-04-06 20:04:00,742 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:04:00,742 INFO L499 BasicCegarLoop]: trace histogram [72, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:04:00,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-04-06 20:04:00,958 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:04:00,958 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:04:00,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:04:00,959 INFO L85 PathProgramCache]: Analyzing trace with hash 2107177110, now seen corresponding path program 141 times [2022-04-06 20:04:00,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:04:00,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [539536844] [2022-04-06 20:04:00,959 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:04:00,959 INFO L85 PathProgramCache]: Analyzing trace with hash 2107177110, now seen corresponding path program 142 times [2022-04-06 20:04:00,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:04:00,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226778817] [2022-04-06 20:04:00,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:04:00,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:04:00,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:04:02,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:04:02,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:04:02,584 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:04:02,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:04:02,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226778817] [2022-04-06 20:04:02,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226778817] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:04:02,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986030869] [2022-04-06 20:04:02,584 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:04:02,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:04:02,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:04:02,585 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:04:02,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-04-06 20:04:02,667 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:04:02,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:04:02,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 625 conjuncts, 75 conjunts are in the unsatisfiable core [2022-04-06 20:04:02,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:04:02,953 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:04:02,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:04:06,733 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:04:06,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986030869] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:04:06,734 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:04:06,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 76, 76] total 152 [2022-04-06 20:04:06,734 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:04:06,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [539536844] [2022-04-06 20:04:06,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [539536844] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:04:06,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:04:06,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-04-06 20:04:06,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414619196] [2022-04-06 20:04:06,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:04:06,734 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-04-06 20:04:06,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:04:06,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-04-06 20:04:06,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10743, Invalid=12209, Unknown=0, NotChecked=0, Total=22952 [2022-04-06 20:04:06,737 INFO L87 Difference]: Start difference. First operand 370 states and 441 transitions. Second operand has 77 states, 77 states have (on average 2.012987012987013) internal successors, (155), 75 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:04:09,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:04:09,071 INFO L93 Difference]: Finished difference Result 388 states and 461 transitions. [2022-04-06 20:04:09,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-04-06 20:04:09,071 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.012987012987013) internal successors, (155), 75 states have internal predecessors, (155), 2 states have call successors, (3), 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 159 [2022-04-06 20:04:09,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:04:09,072 INFO L225 Difference]: With dead ends: 388 [2022-04-06 20:04:09,072 INFO L226 Difference]: Without dead ends: 382 [2022-04-06 20:04:09,075 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 244 SyntacticMatches, 1 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3921 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=21338, Invalid=29512, Unknown=0, NotChecked=0, Total=50850 [2022-04-06 20:04:09,075 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1115 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 417 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1115 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 417 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:04:09,075 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1115 Valid, 45 Invalid, 916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [417 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:04:09,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2022-04-06 20:04:09,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 375. [2022-04-06 20:04:09,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 370 states have (on average 1.1972972972972973) internal successors, (443), 370 states have internal predecessors, (443), 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) [2022-04-06 20:04:09,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 447 transitions. [2022-04-06 20:04:09,259 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 447 transitions. Word has length 159 [2022-04-06 20:04:09,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:04:09,259 INFO L478 AbstractCegarLoop]: Abstraction has 375 states and 447 transitions. [2022-04-06 20:04:09,259 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.012987012987013) internal successors, (155), 75 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:04:09,259 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 447 transitions. [2022-04-06 20:04:09,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-04-06 20:04:09,260 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:04:09,260 INFO L499 BasicCegarLoop]: trace histogram [73, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:04:09,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-04-06 20:04:09,473 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:04:09,473 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:04:09,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:04:09,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1709110481, now seen corresponding path program 143 times [2022-04-06 20:04:09,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:04:09,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1098102394] [2022-04-06 20:04:09,474 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:04:09,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1709110481, now seen corresponding path program 144 times [2022-04-06 20:04:09,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:04:09,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093821990] [2022-04-06 20:04:09,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:04:09,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:04:09,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:04:10,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:04:10,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:04:10,560 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:04:10,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:04:10,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093821990] [2022-04-06 20:04:10,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093821990] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:04:10,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846310610] [2022-04-06 20:04:10,561 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:04:10,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:04:10,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:04:10,562 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:04:10,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-04-06 20:04:10,695 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2022-04-06 20:04:10,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:04:10,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 76 conjunts are in the unsatisfiable core [2022-04-06 20:04:10,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:04:11,033 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:04:11,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:04:14,136 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:04:14,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846310610] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:04:14,137 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:04:14,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 77, 77] total 154 [2022-04-06 20:04:14,137 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:04:14,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1098102394] [2022-04-06 20:04:14,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1098102394] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:04:14,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:04:14,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-04-06 20:04:14,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721186015] [2022-04-06 20:04:14,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:04:14,137 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-04-06 20:04:14,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:04:14,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-04-06 20:04:14,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11038, Invalid=12524, Unknown=0, NotChecked=0, Total=23562 [2022-04-06 20:04:14,140 INFO L87 Difference]: Start difference. First operand 375 states and 447 transitions. Second operand has 78 states, 78 states have (on average 2.0128205128205128) internal successors, (157), 76 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:04:16,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:04:16,524 INFO L93 Difference]: Finished difference Result 393 states and 467 transitions. [2022-04-06 20:04:16,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-04-06 20:04:16,525 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.0128205128205128) internal successors, (157), 76 states have internal predecessors, (157), 2 states have call successors, (3), 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 161 [2022-04-06 20:04:16,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:04:16,526 INFO L225 Difference]: With dead ends: 393 [2022-04-06 20:04:16,526 INFO L226 Difference]: Without dead ends: 387 [2022-04-06 20:04:16,528 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 247 SyntacticMatches, 1 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4012 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=21926, Invalid=30286, Unknown=0, NotChecked=0, Total=52212 [2022-04-06 20:04:16,528 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1149 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 429 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1149 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 429 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:04:16,528 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1149 Valid, 40 Invalid, 933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [429 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:04:16,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-04-06 20:04:16,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 380. [2022-04-06 20:04:16,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 375 states have (on average 1.1973333333333334) internal successors, (449), 375 states have internal predecessors, (449), 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) [2022-04-06 20:04:16,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 453 transitions. [2022-04-06 20:04:16,717 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 453 transitions. Word has length 161 [2022-04-06 20:04:16,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:04:16,717 INFO L478 AbstractCegarLoop]: Abstraction has 380 states and 453 transitions. [2022-04-06 20:04:16,717 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.0128205128205128) internal successors, (157), 76 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:04:16,717 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 453 transitions. [2022-04-06 20:04:16,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-04-06 20:04:16,718 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:04:16,718 INFO L499 BasicCegarLoop]: trace histogram [74, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:04:16,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-04-06 20:04:16,931 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2022-04-06 20:04:16,931 INFO L403 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:04:16,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:04:16,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1419169356, now seen corresponding path program 145 times [2022-04-06 20:04:16,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:04:16,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1385823614] [2022-04-06 20:04:16,932 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:04:16,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1419169356, now seen corresponding path program 146 times [2022-04-06 20:04:16,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:04:16,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528242510] [2022-04-06 20:04:16,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:04:16,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:04:16,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:04:17,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:04:17,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:04:17,967 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:04:17,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:04:17,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528242510] [2022-04-06 20:04:17,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528242510] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:04:17,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452323628] [2022-04-06 20:04:17,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:04:17,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:04:17,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:04:17,968 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:04:17,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-04-06 20:04:18,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:04:18,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:04:18,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 77 conjunts are in the unsatisfiable core [2022-04-06 20:04:18,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:04:18,289 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:04:18,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:04:23,458 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:04:23,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452323628] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:04:23,459 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:04:23,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 78, 78] total 156 [2022-04-06 20:04:23,459 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:04:23,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1385823614] [2022-04-06 20:04:23,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1385823614] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:04:23,459 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:04:23,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-04-06 20:04:23,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637874092] [2022-04-06 20:04:23,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:04:23,459 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-04-06 20:04:23,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:04:23,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-04-06 20:04:23,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11337, Invalid=12843, Unknown=0, NotChecked=0, Total=24180 [2022-04-06 20:04:23,462 INFO L87 Difference]: Start difference. First operand 380 states and 453 transitions. Second operand has 79 states, 79 states have (on average 2.0126582278481013) internal successors, (159), 77 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:04:26,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:04:26,553 INFO L93 Difference]: Finished difference Result 398 states and 473 transitions. [2022-04-06 20:04:26,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-04-06 20:04:26,553 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.0126582278481013) internal successors, (159), 77 states have internal predecessors, (159), 2 states have call successors, (3), 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 163 [2022-04-06 20:04:26,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:04:26,554 INFO L225 Difference]: With dead ends: 398 [2022-04-06 20:04:26,554 INFO L226 Difference]: Without dead ends: 392 [2022-04-06 20:04:26,556 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 250 SyntacticMatches, 1 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4104 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=22522, Invalid=31070, Unknown=0, NotChecked=0, Total=53592 [2022-04-06 20:04:26,556 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 967 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 369 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 967 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 369 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:04:26,556 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [967 Valid, 65 Invalid, 906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [369 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:04:26,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2022-04-06 20:04:26,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 385. [2022-04-06 20:04:26,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 380 states have (on average 1.1973684210526316) internal successors, (455), 380 states have internal predecessors, (455), 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) [2022-04-06 20:04:26,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 459 transitions. [2022-04-06 20:04:26,741 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 459 transitions. Word has length 163 [2022-04-06 20:04:26,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:04:26,741 INFO L478 AbstractCegarLoop]: Abstraction has 385 states and 459 transitions. [2022-04-06 20:04:26,741 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.0126582278481013) internal successors, (159), 77 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:04:26,741 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 459 transitions. [2022-04-06 20:04:26,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-04-06 20:04:26,742 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:04:26,742 INFO L499 BasicCegarLoop]: trace histogram [75, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:04:26,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-04-06 20:04:26,949 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:04:26,949 INFO L403 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:04:26,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:04:26,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1958622471, now seen corresponding path program 147 times [2022-04-06 20:04:26,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:04:26,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1578415344] [2022-04-06 20:04:26,957 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:04:26,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1958622471, now seen corresponding path program 148 times [2022-04-06 20:04:26,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:04:26,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072567818] [2022-04-06 20:04:26,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:04:26,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:04:26,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:04:28,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:04:28,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:04:28,381 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:04:28,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:04:28,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072567818] [2022-04-06 20:04:28,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072567818] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:04:28,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902515946] [2022-04-06 20:04:28,382 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:04:28,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:04:28,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:04:28,382 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:04:28,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-04-06 20:04:28,473 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:04:28,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:04:28,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 649 conjuncts, 78 conjunts are in the unsatisfiable core [2022-04-06 20:04:28,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:04:28,678 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:04:28,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:04:31,763 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:04:31,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902515946] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:04:31,763 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:04:31,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 79, 79] total 158 [2022-04-06 20:04:31,763 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:04:31,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1578415344] [2022-04-06 20:04:31,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1578415344] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:04:31,763 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:04:31,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-04-06 20:04:31,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758833760] [2022-04-06 20:04:31,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:04:31,764 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-04-06 20:04:31,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:04:31,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-04-06 20:04:31,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11640, Invalid=13166, Unknown=0, NotChecked=0, Total=24806 [2022-04-06 20:04:31,766 INFO L87 Difference]: Start difference. First operand 385 states and 459 transitions. Second operand has 80 states, 80 states have (on average 2.0125) internal successors, (161), 78 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:04:34,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:04:34,274 INFO L93 Difference]: Finished difference Result 403 states and 479 transitions. [2022-04-06 20:04:34,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-04-06 20:04:34,274 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.0125) internal successors, (161), 78 states have internal predecessors, (161), 2 states have call successors, (3), 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 165 [2022-04-06 20:04:34,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:04:34,275 INFO L225 Difference]: With dead ends: 403 [2022-04-06 20:04:34,275 INFO L226 Difference]: Without dead ends: 397 [2022-04-06 20:04:34,277 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 253 SyntacticMatches, 1 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4197 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=23126, Invalid=31864, Unknown=0, NotChecked=0, Total=54990 [2022-04-06 20:04:34,291 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1106 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 416 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1106 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 416 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:04:34,291 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1106 Valid, 60 Invalid, 950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [416 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:04:34,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2022-04-06 20:04:34,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 390. [2022-04-06 20:04:34,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 385 states have (on average 1.1974025974025975) internal successors, (461), 385 states have internal predecessors, (461), 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) [2022-04-06 20:04:34,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 465 transitions. [2022-04-06 20:04:34,480 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 465 transitions. Word has length 165 [2022-04-06 20:04:34,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:04:34,480 INFO L478 AbstractCegarLoop]: Abstraction has 390 states and 465 transitions. [2022-04-06 20:04:34,481 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.0125) internal successors, (161), 78 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:04:34,481 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 465 transitions. [2022-04-06 20:04:34,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-04-06 20:04:34,481 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:04:34,481 INFO L499 BasicCegarLoop]: trace histogram [76, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:04:34,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-04-06 20:04:34,697 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:04:34,698 INFO L403 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:04:34,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:04:34,698 INFO L85 PathProgramCache]: Analyzing trace with hash 682023170, now seen corresponding path program 149 times [2022-04-06 20:04:34,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:04:34,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1625533402] [2022-04-06 20:04:34,698 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:04:34,698 INFO L85 PathProgramCache]: Analyzing trace with hash 682023170, now seen corresponding path program 150 times [2022-04-06 20:04:34,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:04:34,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273656305] [2022-04-06 20:04:34,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:04:34,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:04:34,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:04:36,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:04:36,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:04:36,270 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:04:36,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:04:36,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273656305] [2022-04-06 20:04:36,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273656305] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:04:36,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989016807] [2022-04-06 20:04:36,271 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:04:36,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:04:36,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:04:36,272 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:04:36,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-04-06 20:04:36,405 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 76 check-sat command(s) [2022-04-06 20:04:36,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:04:36,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 79 conjunts are in the unsatisfiable core [2022-04-06 20:04:36,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:04:36,610 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:04:36,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:04:39,765 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:04:39,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989016807] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:04:39,765 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:04:39,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 80, 80] total 160 [2022-04-06 20:04:39,765 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:04:39,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1625533402] [2022-04-06 20:04:39,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1625533402] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:04:39,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:04:39,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-04-06 20:04:39,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585782559] [2022-04-06 20:04:39,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:04:39,766 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-04-06 20:04:39,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:04:39,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-04-06 20:04:39,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11947, Invalid=13493, Unknown=0, NotChecked=0, Total=25440 [2022-04-06 20:04:39,769 INFO L87 Difference]: Start difference. First operand 390 states and 465 transitions. Second operand has 81 states, 81 states have (on average 2.0123456790123457) internal successors, (163), 79 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:04:42,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:04:42,308 INFO L93 Difference]: Finished difference Result 408 states and 485 transitions. [2022-04-06 20:04:42,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-04-06 20:04:42,308 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.0123456790123457) internal successors, (163), 79 states have internal predecessors, (163), 2 states have call successors, (3), 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 167 [2022-04-06 20:04:42,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:04:42,309 INFO L225 Difference]: With dead ends: 408 [2022-04-06 20:04:42,309 INFO L226 Difference]: Without dead ends: 402 [2022-04-06 20:04:42,312 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 256 SyntacticMatches, 1 SemanticMatches, 236 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4291 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=23738, Invalid=32668, Unknown=0, NotChecked=0, Total=56406 [2022-04-06 20:04:42,312 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1302 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 482 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1302 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 1022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 482 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:04:42,313 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1302 Valid, 60 Invalid, 1022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [482 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:04:42,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-04-06 20:04:42,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 395. [2022-04-06 20:04:42,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 390 states have (on average 1.1974358974358974) internal successors, (467), 390 states have internal predecessors, (467), 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) [2022-04-06 20:04:42,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 471 transitions. [2022-04-06 20:04:42,516 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 471 transitions. Word has length 167 [2022-04-06 20:04:42,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:04:42,516 INFO L478 AbstractCegarLoop]: Abstraction has 395 states and 471 transitions. [2022-04-06 20:04:42,516 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.0123456790123457) internal successors, (163), 79 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:04:42,516 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 471 transitions. [2022-04-06 20:04:42,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-04-06 20:04:42,517 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:04:42,517 INFO L499 BasicCegarLoop]: trace histogram [77, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:04:42,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-04-06 20:04:42,727 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2022-04-06 20:04:42,728 INFO L403 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:04:42,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:04:42,728 INFO L85 PathProgramCache]: Analyzing trace with hash -2064225731, now seen corresponding path program 151 times [2022-04-06 20:04:42,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:04:42,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [644353880] [2022-04-06 20:04:42,728 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:04:42,728 INFO L85 PathProgramCache]: Analyzing trace with hash -2064225731, now seen corresponding path program 152 times [2022-04-06 20:04:42,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:04:42,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506496150] [2022-04-06 20:04:42,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:04:42,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:04:42,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:04:43,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:04:43,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:04:43,866 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:04:43,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:04:43,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506496150] [2022-04-06 20:04:43,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506496150] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:04:43,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015683536] [2022-04-06 20:04:43,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:04:43,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:04:43,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:04:43,868 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:04:43,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-04-06 20:04:43,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:04:43,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:04:43,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 80 conjunts are in the unsatisfiable core [2022-04-06 20:04:43,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:04:44,227 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:04:44,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:04:47,457 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:04:47,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015683536] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:04:47,457 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:04:47,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 81, 81] total 162 [2022-04-06 20:04:47,457 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:04:47,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [644353880] [2022-04-06 20:04:47,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [644353880] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:04:47,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:04:47,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-04-06 20:04:47,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901308097] [2022-04-06 20:04:47,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:04:47,458 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-04-06 20:04:47,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:04:47,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-04-06 20:04:47,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12258, Invalid=13824, Unknown=0, NotChecked=0, Total=26082 [2022-04-06 20:04:47,460 INFO L87 Difference]: Start difference. First operand 395 states and 471 transitions. Second operand has 82 states, 82 states have (on average 2.0121951219512195) internal successors, (165), 80 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:04:50,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:04:50,115 INFO L93 Difference]: Finished difference Result 413 states and 491 transitions. [2022-04-06 20:04:50,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-04-06 20:04:50,115 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.0121951219512195) internal successors, (165), 80 states have internal predecessors, (165), 2 states have call successors, (3), 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 169 [2022-04-06 20:04:50,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:04:50,117 INFO L225 Difference]: With dead ends: 413 [2022-04-06 20:04:50,117 INFO L226 Difference]: Without dead ends: 407 [2022-04-06 20:04:50,119 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 259 SyntacticMatches, 1 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4386 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=24358, Invalid=33482, Unknown=0, NotChecked=0, Total=57840 [2022-04-06 20:04:50,119 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1381 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 509 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1381 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 509 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:04:50,119 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1381 Valid, 40 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [509 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:04:50,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-04-06 20:04:50,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 400. [2022-04-06 20:04:50,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 395 states have (on average 1.1974683544303797) internal successors, (473), 395 states have internal predecessors, (473), 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) [2022-04-06 20:04:50,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 477 transitions. [2022-04-06 20:04:50,328 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 477 transitions. Word has length 169 [2022-04-06 20:04:50,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:04:50,328 INFO L478 AbstractCegarLoop]: Abstraction has 400 states and 477 transitions. [2022-04-06 20:04:50,328 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.0121951219512195) internal successors, (165), 80 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:04:50,328 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 477 transitions. [2022-04-06 20:04:50,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-04-06 20:04:50,329 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:04:50,329 INFO L499 BasicCegarLoop]: trace histogram [78, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:04:50,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-04-06 20:04:50,532 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-04-06 20:04:50,532 INFO L403 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:04:50,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:04:50,532 INFO L85 PathProgramCache]: Analyzing trace with hash 195467448, now seen corresponding path program 153 times [2022-04-06 20:04:50,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:04:50,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1438396478] [2022-04-06 20:04:50,533 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:04:50,533 INFO L85 PathProgramCache]: Analyzing trace with hash 195467448, now seen corresponding path program 154 times [2022-04-06 20:04:50,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:04:50,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664529313] [2022-04-06 20:04:50,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:04:50,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:04:50,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:04:51,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:04:51,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:04:51,983 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:04:51,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:04:51,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664529313] [2022-04-06 20:04:51,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664529313] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:04:51,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760952620] [2022-04-06 20:04:51,983 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:04:51,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:04:51,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:04:51,984 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:04:51,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-04-06 20:04:52,056 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:04:52,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:04:52,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 673 conjuncts, 81 conjunts are in the unsatisfiable core [2022-04-06 20:04:52,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:04:52,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:04:52,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:04:55,509 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:04:55,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760952620] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:04:55,510 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:04:55,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 82, 82] total 164 [2022-04-06 20:04:55,510 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:04:55,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1438396478] [2022-04-06 20:04:55,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1438396478] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:04:55,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:04:55,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-04-06 20:04:55,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250038555] [2022-04-06 20:04:55,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:04:55,510 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-04-06 20:04:55,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:04:55,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-04-06 20:04:55,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12573, Invalid=14159, Unknown=0, NotChecked=0, Total=26732 [2022-04-06 20:04:55,527 INFO L87 Difference]: Start difference. First operand 400 states and 477 transitions. Second operand has 83 states, 83 states have (on average 2.0120481927710845) internal successors, (167), 81 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:04:58,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:04:58,933 INFO L93 Difference]: Finished difference Result 418 states and 497 transitions. [2022-04-06 20:04:58,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-04-06 20:04:58,933 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.0120481927710845) internal successors, (167), 81 states have internal predecessors, (167), 2 states have call successors, (3), 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 171 [2022-04-06 20:04:58,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:04:58,934 INFO L225 Difference]: With dead ends: 418 [2022-04-06 20:04:58,934 INFO L226 Difference]: Without dead ends: 412 [2022-04-06 20:04:58,936 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 262 SyntacticMatches, 1 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4482 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=24986, Invalid=34306, Unknown=0, NotChecked=0, Total=59292 [2022-04-06 20:04:58,936 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1016 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 388 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1016 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 388 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:04:58,936 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1016 Valid, 65 Invalid, 949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [388 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:04:58,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2022-04-06 20:04:59,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 405. [2022-04-06 20:04:59,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 400 states have (on average 1.1975) internal successors, (479), 400 states have internal predecessors, (479), 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) [2022-04-06 20:04:59,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 483 transitions. [2022-04-06 20:04:59,146 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 483 transitions. Word has length 171 [2022-04-06 20:04:59,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:04:59,146 INFO L478 AbstractCegarLoop]: Abstraction has 405 states and 483 transitions. [2022-04-06 20:04:59,147 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.0120481927710845) internal successors, (167), 81 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:04:59,147 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 483 transitions. [2022-04-06 20:04:59,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-04-06 20:04:59,148 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:04:59,148 INFO L499 BasicCegarLoop]: trace histogram [79, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:04:59,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-04-06 20:04:59,364 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:04:59,364 INFO L403 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:04:59,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:04:59,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1492839309, now seen corresponding path program 155 times [2022-04-06 20:04:59,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:04:59,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [171427415] [2022-04-06 20:04:59,365 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:04:59,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1492839309, now seen corresponding path program 156 times [2022-04-06 20:04:59,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:04:59,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115037434] [2022-04-06 20:04:59,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:04:59,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:04:59,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:05:01,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:05:01,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:05:01,197 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:05:01,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:05:01,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115037434] [2022-04-06 20:05:01,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115037434] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:05:01,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515064817] [2022-04-06 20:05:01,197 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:05:01,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:05:01,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:05:01,198 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:05:01,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-04-06 20:05:01,355 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2022-04-06 20:05:01,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:05:01,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 82 conjunts are in the unsatisfiable core [2022-04-06 20:05:01,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:05:01,677 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:05:01,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:05:05,317 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:05:05,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515064817] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:05:05,318 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:05:05,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 83, 83] total 166 [2022-04-06 20:05:05,318 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:05:05,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [171427415] [2022-04-06 20:05:05,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [171427415] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:05:05,318 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:05:05,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-04-06 20:05:05,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759251957] [2022-04-06 20:05:05,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:05:05,318 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-04-06 20:05:05,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:05:05,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-04-06 20:05:05,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12892, Invalid=14498, Unknown=0, NotChecked=0, Total=27390 [2022-04-06 20:05:05,321 INFO L87 Difference]: Start difference. First operand 405 states and 483 transitions. Second operand has 84 states, 84 states have (on average 2.011904761904762) internal successors, (169), 82 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:05:08,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:05:08,297 INFO L93 Difference]: Finished difference Result 423 states and 503 transitions. [2022-04-06 20:05:08,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-04-06 20:05:08,297 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.011904761904762) internal successors, (169), 82 states have internal predecessors, (169), 2 states have call successors, (3), 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 173 [2022-04-06 20:05:08,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:05:08,298 INFO L225 Difference]: With dead ends: 423 [2022-04-06 20:05:08,298 INFO L226 Difference]: Without dead ends: 417 [2022-04-06 20:05:08,301 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 511 GetRequests, 265 SyntacticMatches, 1 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4579 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=25622, Invalid=35140, Unknown=0, NotChecked=0, Total=60762 [2022-04-06 20:05:08,301 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1128 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 426 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1128 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 426 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:05:08,301 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1128 Valid, 55 Invalid, 979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [426 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:05:08,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2022-04-06 20:05:08,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 410. [2022-04-06 20:05:08,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 405 states have (on average 1.1975308641975309) internal successors, (485), 405 states have internal predecessors, (485), 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) [2022-04-06 20:05:08,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 489 transitions. [2022-04-06 20:05:08,547 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 489 transitions. Word has length 173 [2022-04-06 20:05:08,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:05:08,548 INFO L478 AbstractCegarLoop]: Abstraction has 410 states and 489 transitions. [2022-04-06 20:05:08,548 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.011904761904762) internal successors, (169), 82 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:05:08,548 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 489 transitions. [2022-04-06 20:05:08,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-04-06 20:05:08,548 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:05:08,549 INFO L499 BasicCegarLoop]: trace histogram [80, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:05:08,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-04-06 20:05:08,765 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:05:08,765 INFO L403 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:05:08,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:05:08,765 INFO L85 PathProgramCache]: Analyzing trace with hash -457994898, now seen corresponding path program 157 times [2022-04-06 20:05:08,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:05:08,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [912180244] [2022-04-06 20:05:08,766 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:05:08,766 INFO L85 PathProgramCache]: Analyzing trace with hash -457994898, now seen corresponding path program 158 times [2022-04-06 20:05:08,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:05:08,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535280813] [2022-04-06 20:05:08,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:05:08,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:05:08,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:05:10,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:05:10,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:05:10,555 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:05:10,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:05:10,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535280813] [2022-04-06 20:05:10,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535280813] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:05:10,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854810199] [2022-04-06 20:05:10,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:05:10,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:05:10,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:05:10,556 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:05:10,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-04-06 20:05:10,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:05:10,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:05:10,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 689 conjuncts, 83 conjunts are in the unsatisfiable core [2022-04-06 20:05:10,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:05:10,915 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:05:10,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:05:15,219 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:05:15,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854810199] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:05:15,219 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:05:15,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 84, 84] total 168 [2022-04-06 20:05:15,219 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:05:15,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [912180244] [2022-04-06 20:05:15,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [912180244] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:05:15,220 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:05:15,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-04-06 20:05:15,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82288858] [2022-04-06 20:05:15,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:05:15,220 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-04-06 20:05:15,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:05:15,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-04-06 20:05:15,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13215, Invalid=14841, Unknown=0, NotChecked=0, Total=28056 [2022-04-06 20:05:15,222 INFO L87 Difference]: Start difference. First operand 410 states and 489 transitions. Second operand has 85 states, 85 states have (on average 2.011764705882353) internal successors, (171), 83 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:05:18,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:05:18,487 INFO L93 Difference]: Finished difference Result 428 states and 509 transitions. [2022-04-06 20:05:18,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-04-06 20:05:18,488 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.011764705882353) internal successors, (171), 83 states have internal predecessors, (171), 2 states have call successors, (3), 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 175 [2022-04-06 20:05:18,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:05:18,489 INFO L225 Difference]: With dead ends: 428 [2022-04-06 20:05:18,489 INFO L226 Difference]: Without dead ends: 422 [2022-04-06 20:05:18,491 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 517 GetRequests, 268 SyntacticMatches, 1 SemanticMatches, 248 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4677 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=26266, Invalid=35984, Unknown=0, NotChecked=0, Total=62250 [2022-04-06 20:05:18,491 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1216 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 456 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1216 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 456 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:05:18,491 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1216 Valid, 50 Invalid, 1008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [456 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:05:18,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2022-04-06 20:05:18,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 415. [2022-04-06 20:05:18,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 410 states have (on average 1.197560975609756) internal successors, (491), 410 states have internal predecessors, (491), 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) [2022-04-06 20:05:18,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 495 transitions. [2022-04-06 20:05:18,715 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 495 transitions. Word has length 175 [2022-04-06 20:05:18,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:05:18,716 INFO L478 AbstractCegarLoop]: Abstraction has 415 states and 495 transitions. [2022-04-06 20:05:18,716 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.011764705882353) internal successors, (171), 83 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:05:18,716 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 495 transitions. [2022-04-06 20:05:18,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-04-06 20:05:18,716 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:05:18,717 INFO L499 BasicCegarLoop]: trace histogram [81, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:05:18,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-04-06 20:05:18,919 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:05:18,919 INFO L403 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:05:18,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:05:18,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1890038697, now seen corresponding path program 159 times [2022-04-06 20:05:18,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:05:18,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1154593653] [2022-04-06 20:05:18,920 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:05:18,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1890038697, now seen corresponding path program 160 times [2022-04-06 20:05:18,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:05:18,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527701336] [2022-04-06 20:05:18,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:05:18,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:05:18,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:05:20,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:05:20,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:05:20,798 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:05:20,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:05:20,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527701336] [2022-04-06 20:05:20,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527701336] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:05:20,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641570959] [2022-04-06 20:05:20,798 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:05:20,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:05:20,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:05:20,799 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:05:20,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-04-06 20:05:20,901 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:05:20,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:05:20,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 697 conjuncts, 84 conjunts are in the unsatisfiable core [2022-04-06 20:05:20,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:05:21,185 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:05:21,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:05:26,978 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:05:26,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641570959] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:05:26,979 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:05:26,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 85, 85] total 170 [2022-04-06 20:05:26,979 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:05:26,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1154593653] [2022-04-06 20:05:26,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1154593653] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:05:26,979 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:05:26,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-04-06 20:05:26,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449171572] [2022-04-06 20:05:26,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:05:26,979 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-04-06 20:05:26,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:05:26,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-04-06 20:05:26,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13542, Invalid=15188, Unknown=0, NotChecked=0, Total=28730 [2022-04-06 20:05:26,981 INFO L87 Difference]: Start difference. First operand 415 states and 495 transitions. Second operand has 86 states, 86 states have (on average 2.011627906976744) internal successors, (173), 84 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:05:30,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:05:30,134 INFO L93 Difference]: Finished difference Result 433 states and 515 transitions. [2022-04-06 20:05:30,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-04-06 20:05:30,134 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.011627906976744) internal successors, (173), 84 states have internal predecessors, (173), 2 states have call successors, (3), 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 177 [2022-04-06 20:05:30,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:05:30,135 INFO L225 Difference]: With dead ends: 433 [2022-04-06 20:05:30,135 INFO L226 Difference]: Without dead ends: 427 [2022-04-06 20:05:30,138 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 523 GetRequests, 271 SyntacticMatches, 1 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4776 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=26918, Invalid=36838, Unknown=0, NotChecked=0, Total=63756 [2022-04-06 20:05:30,138 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1133 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 429 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1133 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 1006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 429 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:05:30,139 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1133 Valid, 65 Invalid, 1006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [429 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:05:30,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2022-04-06 20:05:30,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 420. [2022-04-06 20:05:30,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 415 states have (on average 1.1975903614457832) internal successors, (497), 415 states have internal predecessors, (497), 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) [2022-04-06 20:05:30,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 501 transitions. [2022-04-06 20:05:30,384 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 501 transitions. Word has length 177 [2022-04-06 20:05:30,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:05:30,384 INFO L478 AbstractCegarLoop]: Abstraction has 420 states and 501 transitions. [2022-04-06 20:05:30,384 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.011627906976744) internal successors, (173), 84 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:05:30,384 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 501 transitions. [2022-04-06 20:05:30,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-04-06 20:05:30,385 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:05:30,385 INFO L499 BasicCegarLoop]: trace histogram [82, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:05:30,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-04-06 20:05:30,601 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:05:30,601 INFO L403 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:05:30,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:05:30,601 INFO L85 PathProgramCache]: Analyzing trace with hash -802474204, now seen corresponding path program 161 times [2022-04-06 20:05:30,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:05:30,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [348601008] [2022-04-06 20:05:30,602 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:05:30,602 INFO L85 PathProgramCache]: Analyzing trace with hash -802474204, now seen corresponding path program 162 times [2022-04-06 20:05:30,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:05:30,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47092701] [2022-04-06 20:05:30,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:05:30,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:05:30,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:05:31,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:05:31,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:05:31,842 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:05:31,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:05:31,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47092701] [2022-04-06 20:05:31,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47092701] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:05:31,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016189281] [2022-04-06 20:05:31,842 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:05:31,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:05:31,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:05:31,843 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:05:31,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-04-06 20:05:31,990 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 82 check-sat command(s) [2022-04-06 20:05:31,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:05:31,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 705 conjuncts, 85 conjunts are in the unsatisfiable core [2022-04-06 20:05:31,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:05:32,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:05:32,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:05:35,834 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:05:35,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016189281] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:05:35,835 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:05:35,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 86, 86] total 172 [2022-04-06 20:05:35,835 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:05:35,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [348601008] [2022-04-06 20:05:35,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [348601008] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:05:35,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:05:35,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-04-06 20:05:35,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321152291] [2022-04-06 20:05:35,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:05:35,835 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-04-06 20:05:35,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:05:35,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-04-06 20:05:35,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13873, Invalid=15539, Unknown=0, NotChecked=0, Total=29412 [2022-04-06 20:05:35,837 INFO L87 Difference]: Start difference. First operand 420 states and 501 transitions. Second operand has 87 states, 87 states have (on average 2.0114942528735633) internal successors, (175), 85 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:05:39,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:05:39,143 INFO L93 Difference]: Finished difference Result 438 states and 521 transitions. [2022-04-06 20:05:39,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-04-06 20:05:39,143 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.0114942528735633) internal successors, (175), 85 states have internal predecessors, (175), 2 states have call successors, (3), 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 179 [2022-04-06 20:05:39,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:05:39,145 INFO L225 Difference]: With dead ends: 438 [2022-04-06 20:05:39,145 INFO L226 Difference]: Without dead ends: 432 [2022-04-06 20:05:39,147 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 529 GetRequests, 274 SyntacticMatches, 1 SemanticMatches, 254 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4876 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=27578, Invalid=37702, Unknown=0, NotChecked=0, Total=65280 [2022-04-06 20:05:39,147 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1296 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 484 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1296 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 484 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:05:39,147 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1296 Valid, 40 Invalid, 1034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [484 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:05:39,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2022-04-06 20:05:39,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 425. [2022-04-06 20:05:39,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 420 states have (on average 1.1976190476190476) internal successors, (503), 420 states have internal predecessors, (503), 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) [2022-04-06 20:05:39,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 507 transitions. [2022-04-06 20:05:39,384 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 507 transitions. Word has length 179 [2022-04-06 20:05:39,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:05:39,384 INFO L478 AbstractCegarLoop]: Abstraction has 425 states and 507 transitions. [2022-04-06 20:05:39,384 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 2.0114942528735633) internal successors, (175), 85 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:05:39,384 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 507 transitions. [2022-04-06 20:05:39,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-04-06 20:05:39,385 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:05:39,385 INFO L499 BasicCegarLoop]: trace histogram [83, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:05:39,401 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2022-04-06 20:05:39,601 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:05:39,601 INFO L403 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:05:39,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:05:39,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1557907423, now seen corresponding path program 163 times [2022-04-06 20:05:39,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:05:39,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [822877171] [2022-04-06 20:05:39,602 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:05:39,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1557907423, now seen corresponding path program 164 times [2022-04-06 20:05:39,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:05:39,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93183265] [2022-04-06 20:05:39,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:05:39,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:05:39,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:05:41,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:05:41,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:05:41,780 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:05:41,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:05:41,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93183265] [2022-04-06 20:05:41,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93183265] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:05:41,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455192192] [2022-04-06 20:05:41,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:05:41,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:05:41,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:05:41,781 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:05:41,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-04-06 20:05:41,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:05:41,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:05:41,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 713 conjuncts, 86 conjunts are in the unsatisfiable core [2022-04-06 20:05:41,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:05:42,192 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:05:42,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:05:48,434 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:05:48,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455192192] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:05:48,434 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:05:48,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 87, 87] total 174 [2022-04-06 20:05:48,435 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:05:48,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [822877171] [2022-04-06 20:05:48,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [822877171] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:05:48,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:05:48,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-04-06 20:05:48,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195407674] [2022-04-06 20:05:48,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:05:48,435 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-04-06 20:05:48,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:05:48,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-04-06 20:05:48,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14208, Invalid=15894, Unknown=0, NotChecked=0, Total=30102 [2022-04-06 20:05:48,438 INFO L87 Difference]: Start difference. First operand 425 states and 507 transitions. Second operand has 88 states, 88 states have (on average 2.0113636363636362) internal successors, (177), 86 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:05:51,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:05:51,581 INFO L93 Difference]: Finished difference Result 443 states and 527 transitions. [2022-04-06 20:05:51,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-04-06 20:05:51,581 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.0113636363636362) internal successors, (177), 86 states have internal predecessors, (177), 2 states have call successors, (3), 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 181 [2022-04-06 20:05:51,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:05:51,582 INFO L225 Difference]: With dead ends: 443 [2022-04-06 20:05:51,582 INFO L226 Difference]: Without dead ends: 437 [2022-04-06 20:05:51,584 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 535 GetRequests, 277 SyntacticMatches, 1 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4977 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=28246, Invalid=38576, Unknown=0, NotChecked=0, Total=66822 [2022-04-06 20:05:51,585 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1279 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 479 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1279 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 479 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:05:51,585 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1279 Valid, 40 Invalid, 1039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [479 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:05:51,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2022-04-06 20:05:51,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 430. [2022-04-06 20:05:51,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 425 states have (on average 1.1976470588235295) internal successors, (509), 425 states have internal predecessors, (509), 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) [2022-04-06 20:05:51,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 513 transitions. [2022-04-06 20:05:51,817 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 513 transitions. Word has length 181 [2022-04-06 20:05:51,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:05:51,817 INFO L478 AbstractCegarLoop]: Abstraction has 430 states and 513 transitions. [2022-04-06 20:05:51,817 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.0113636363636362) internal successors, (177), 86 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:05:51,817 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 513 transitions. [2022-04-06 20:05:51,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-04-06 20:05:51,818 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:05:51,818 INFO L499 BasicCegarLoop]: trace histogram [84, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:05:51,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-04-06 20:05:52,022 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2022-04-06 20:05:52,022 INFO L403 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:05:52,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:05:52,023 INFO L85 PathProgramCache]: Analyzing trace with hash 2141918682, now seen corresponding path program 165 times [2022-04-06 20:05:52,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:05:52,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1451031549] [2022-04-06 20:05:52,023 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:05:52,023 INFO L85 PathProgramCache]: Analyzing trace with hash 2141918682, now seen corresponding path program 166 times [2022-04-06 20:05:52,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:05:52,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702594093] [2022-04-06 20:05:52,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:05:52,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:05:52,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:05:53,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:05:53,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:05:53,636 INFO L134 CoverageAnalysis]: Checked inductivity of 6972 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:05:53,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:05:53,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702594093] [2022-04-06 20:05:53,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702594093] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:05:53,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500804627] [2022-04-06 20:05:53,636 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:05:53,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:05:53,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:05:53,637 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:05:53,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-04-06 20:05:53,730 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:05:53,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:05:53,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 87 conjunts are in the unsatisfiable core [2022-04-06 20:05:53,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:05:53,920 INFO L134 CoverageAnalysis]: Checked inductivity of 6972 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:05:53,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:05:57,777 INFO L134 CoverageAnalysis]: Checked inductivity of 6972 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:05:57,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500804627] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:05:57,778 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:05:57,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 88, 88] total 176 [2022-04-06 20:05:57,778 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:05:57,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1451031549] [2022-04-06 20:05:57,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1451031549] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:05:57,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:05:57,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-04-06 20:05:57,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333769417] [2022-04-06 20:05:57,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:05:57,779 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-04-06 20:05:57,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:05:57,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-04-06 20:05:57,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14547, Invalid=16253, Unknown=0, NotChecked=0, Total=30800 [2022-04-06 20:05:57,782 INFO L87 Difference]: Start difference. First operand 430 states and 513 transitions. Second operand has 89 states, 89 states have (on average 2.0112359550561796) internal successors, (179), 87 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:06:01,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:06:01,469 INFO L93 Difference]: Finished difference Result 448 states and 533 transitions. [2022-04-06 20:06:01,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-04-06 20:06:01,470 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.0112359550561796) internal successors, (179), 87 states have internal predecessors, (179), 2 states have call successors, (3), 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 183 [2022-04-06 20:06:01,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:06:01,471 INFO L225 Difference]: With dead ends: 448 [2022-04-06 20:06:01,471 INFO L226 Difference]: Without dead ends: 442 [2022-04-06 20:06:01,474 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 541 GetRequests, 280 SyntacticMatches, 1 SemanticMatches, 260 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5079 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=28922, Invalid=39460, Unknown=0, NotChecked=0, Total=68382 [2022-04-06 20:06:01,474 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1649 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 603 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1649 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 603 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:06:01,474 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1649 Valid, 40 Invalid, 1163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [603 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:06:01,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2022-04-06 20:06:01,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 435. [2022-04-06 20:06:01,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 430 states have (on average 1.197674418604651) internal successors, (515), 430 states have internal predecessors, (515), 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) [2022-04-06 20:06:01,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 519 transitions. [2022-04-06 20:06:01,727 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 519 transitions. Word has length 183 [2022-04-06 20:06:01,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:06:01,727 INFO L478 AbstractCegarLoop]: Abstraction has 435 states and 519 transitions. [2022-04-06 20:06:01,727 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.0112359550561796) internal successors, (179), 87 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:06:01,727 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 519 transitions. [2022-04-06 20:06:01,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-04-06 20:06:01,728 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:06:01,728 INFO L499 BasicCegarLoop]: trace histogram [85, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:06:01,744 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2022-04-06 20:06:01,941 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:06:01,941 INFO L403 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:06:01,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:06:01,941 INFO L85 PathProgramCache]: Analyzing trace with hash 736022805, now seen corresponding path program 167 times [2022-04-06 20:06:01,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:01,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2008551388] [2022-04-06 20:06:01,942 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:06:01,942 INFO L85 PathProgramCache]: Analyzing trace with hash 736022805, now seen corresponding path program 168 times [2022-04-06 20:06:01,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:06:01,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793582941] [2022-04-06 20:06:01,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:06:01,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:06:01,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:03,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:06:03,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:03,735 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:03,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:06:03,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793582941] [2022-04-06 20:06:03,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793582941] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:06:03,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078647640] [2022-04-06 20:06:03,735 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:06:03,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:06:03,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:06:03,736 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:06:03,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-04-06 20:06:03,906 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s) [2022-04-06 20:06:03,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:06:03,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 729 conjuncts, 88 conjunts are in the unsatisfiable core [2022-04-06 20:06:03,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:06:04,096 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:04,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:06:08,004 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:08,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078647640] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:06:08,005 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:06:08,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 89, 89] total 178 [2022-04-06 20:06:08,006 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:06:08,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2008551388] [2022-04-06 20:06:08,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2008551388] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:06:08,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:06:08,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-04-06 20:06:08,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403126477] [2022-04-06 20:06:08,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:06:08,011 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-04-06 20:06:08,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:08,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-04-06 20:06:08,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14890, Invalid=16616, Unknown=0, NotChecked=0, Total=31506 [2022-04-06 20:06:08,014 INFO L87 Difference]: Start difference. First operand 435 states and 519 transitions. Second operand has 90 states, 90 states have (on average 2.011111111111111) internal successors, (181), 88 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:06:11,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:06:11,332 INFO L93 Difference]: Finished difference Result 453 states and 539 transitions. [2022-04-06 20:06:11,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-04-06 20:06:11,332 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.011111111111111) internal successors, (181), 88 states have internal predecessors, (181), 2 states have call successors, (3), 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 185 [2022-04-06 20:06:11,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:06:11,336 INFO L225 Difference]: With dead ends: 453 [2022-04-06 20:06:11,336 INFO L226 Difference]: Without dead ends: 447 [2022-04-06 20:06:11,340 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 547 GetRequests, 283 SyntacticMatches, 1 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5182 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=29606, Invalid=40354, Unknown=0, NotChecked=0, Total=69960 [2022-04-06 20:06:11,340 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1314 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 492 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1314 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 492 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:06:11,340 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1314 Valid, 45 Invalid, 1069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [492 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:06:11,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2022-04-06 20:06:11,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 440. [2022-04-06 20:06:11,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 435 states have (on average 1.1977011494252874) internal successors, (521), 435 states have internal predecessors, (521), 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) [2022-04-06 20:06:11,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 525 transitions. [2022-04-06 20:06:11,631 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 525 transitions. Word has length 185 [2022-04-06 20:06:11,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:06:11,632 INFO L478 AbstractCegarLoop]: Abstraction has 440 states and 525 transitions. [2022-04-06 20:06:11,632 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.011111111111111) internal successors, (181), 88 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:06:11,632 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 525 transitions. [2022-04-06 20:06:11,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-04-06 20:06:11,632 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:06:11,633 INFO L499 BasicCegarLoop]: trace histogram [86, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:06:11,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-04-06 20:06:11,843 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:06:11,843 INFO L403 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:06:11,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:06:11,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1710184048, now seen corresponding path program 169 times [2022-04-06 20:06:11,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:11,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [521078964] [2022-04-06 20:06:11,844 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:06:11,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1710184048, now seen corresponding path program 170 times [2022-04-06 20:06:11,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:06:11,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464452518] [2022-04-06 20:06:11,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:06:11,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:06:11,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:13,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:06:13,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:13,194 INFO L134 CoverageAnalysis]: Checked inductivity of 7310 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:13,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:06:13,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464452518] [2022-04-06 20:06:13,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464452518] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:06:13,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147009804] [2022-04-06 20:06:13,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:06:13,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:06:13,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:06:13,197 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:06:13,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-04-06 20:06:13,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:06:13,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:06:13,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 737 conjuncts, 89 conjunts are in the unsatisfiable core [2022-04-06 20:06:13,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:06:13,501 INFO L134 CoverageAnalysis]: Checked inductivity of 7310 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:13,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:06:17,538 INFO L134 CoverageAnalysis]: Checked inductivity of 7310 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:17,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147009804] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:06:17,539 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:06:17,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 90, 90] total 180 [2022-04-06 20:06:17,539 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:06:17,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [521078964] [2022-04-06 20:06:17,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [521078964] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:06:17,539 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:06:17,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-04-06 20:06:17,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425182154] [2022-04-06 20:06:17,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:06:17,540 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-04-06 20:06:17,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:17,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-04-06 20:06:17,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15237, Invalid=16983, Unknown=0, NotChecked=0, Total=32220 [2022-04-06 20:06:17,544 INFO L87 Difference]: Start difference. First operand 440 states and 525 transitions. Second operand has 91 states, 91 states have (on average 2.010989010989011) internal successors, (183), 89 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:06:21,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:06:21,560 INFO L93 Difference]: Finished difference Result 458 states and 545 transitions. [2022-04-06 20:06:21,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-04-06 20:06:21,561 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.010989010989011) internal successors, (183), 89 states have internal predecessors, (183), 2 states have call successors, (3), 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 187 [2022-04-06 20:06:21,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:06:21,562 INFO L225 Difference]: With dead ends: 458 [2022-04-06 20:06:21,562 INFO L226 Difference]: Without dead ends: 452 [2022-04-06 20:06:21,564 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 553 GetRequests, 286 SyntacticMatches, 1 SemanticMatches, 266 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5286 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=30298, Invalid=41258, Unknown=0, NotChecked=0, Total=71556 [2022-04-06 20:06:21,564 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1492 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 552 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1492 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 552 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:06:21,564 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1492 Valid, 55 Invalid, 1145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [552 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:06:21,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2022-04-06 20:06:21,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 445. [2022-04-06 20:06:21,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 440 states have (on average 1.1977272727272728) internal successors, (527), 440 states have internal predecessors, (527), 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) [2022-04-06 20:06:21,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 531 transitions. [2022-04-06 20:06:21,826 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 531 transitions. Word has length 187 [2022-04-06 20:06:21,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:06:21,826 INFO L478 AbstractCegarLoop]: Abstraction has 445 states and 531 transitions. [2022-04-06 20:06:21,826 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.010989010989011) internal successors, (183), 89 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:06:21,826 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 531 transitions. [2022-04-06 20:06:21,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-04-06 20:06:21,827 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:06:21,827 INFO L499 BasicCegarLoop]: trace histogram [87, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:06:21,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-04-06 20:06:22,043 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:06:22,044 INFO L403 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:06:22,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:06:22,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1127108427, now seen corresponding path program 171 times [2022-04-06 20:06:22,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:22,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1124273529] [2022-04-06 20:06:22,044 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:06:22,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1127108427, now seen corresponding path program 172 times [2022-04-06 20:06:22,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:06:22,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289631878] [2022-04-06 20:06:22,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:06:22,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:06:22,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:24,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:06:24,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:24,062 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:24,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:06:24,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289631878] [2022-04-06 20:06:24,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289631878] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:06:24,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791471524] [2022-04-06 20:06:24,063 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:06:24,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:06:24,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:06:24,063 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:06:24,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-04-06 20:06:24,158 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:06:24,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:06:24,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 745 conjuncts, 90 conjunts are in the unsatisfiable core [2022-04-06 20:06:24,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:06:24,504 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:24,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:06:29,063 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:29,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791471524] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:06:29,063 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:06:29,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 91, 91] total 182 [2022-04-06 20:06:29,063 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:06:29,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1124273529] [2022-04-06 20:06:29,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1124273529] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:06:29,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:06:29,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-04-06 20:06:29,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371025640] [2022-04-06 20:06:29,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:06:29,064 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-04-06 20:06:29,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:29,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-04-06 20:06:29,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15588, Invalid=17354, Unknown=0, NotChecked=0, Total=32942 [2022-04-06 20:06:29,067 INFO L87 Difference]: Start difference. First operand 445 states and 531 transitions. Second operand has 92 states, 92 states have (on average 2.010869565217391) internal successors, (185), 90 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:06:32,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:06:32,618 INFO L93 Difference]: Finished difference Result 463 states and 551 transitions. [2022-04-06 20:06:32,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-04-06 20:06:32,619 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.010869565217391) internal successors, (185), 90 states have internal predecessors, (185), 2 states have call successors, (3), 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 189 [2022-04-06 20:06:32,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:06:32,620 INFO L225 Difference]: With dead ends: 463 [2022-04-06 20:06:32,620 INFO L226 Difference]: Without dead ends: 457 [2022-04-06 20:06:32,623 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 559 GetRequests, 289 SyntacticMatches, 1 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5391 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=30998, Invalid=42172, Unknown=0, NotChecked=0, Total=73170 [2022-04-06 20:06:32,623 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1265 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 477 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1265 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 477 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:06:32,623 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1265 Valid, 55 Invalid, 1076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [477 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:06:32,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2022-04-06 20:06:32,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 450. [2022-04-06 20:06:32,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 445 states have (on average 1.1977528089887641) internal successors, (533), 445 states have internal predecessors, (533), 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) [2022-04-06 20:06:32,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 537 transitions. [2022-04-06 20:06:32,892 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 537 transitions. Word has length 189 [2022-04-06 20:06:32,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:06:32,892 INFO L478 AbstractCegarLoop]: Abstraction has 450 states and 537 transitions. [2022-04-06 20:06:32,892 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.010869565217391) internal successors, (185), 90 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:06:32,892 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 537 transitions. [2022-04-06 20:06:32,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-04-06 20:06:32,893 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:06:32,893 INFO L499 BasicCegarLoop]: trace histogram [88, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:06:32,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-04-06 20:06:33,109 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:06:33,109 INFO L403 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:06:33,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:06:33,109 INFO L85 PathProgramCache]: Analyzing trace with hash 460943942, now seen corresponding path program 173 times [2022-04-06 20:06:33,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:33,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2055747832] [2022-04-06 20:06:33,110 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:06:33,110 INFO L85 PathProgramCache]: Analyzing trace with hash 460943942, now seen corresponding path program 174 times [2022-04-06 20:06:33,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:06:33,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057763729] [2022-04-06 20:06:33,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:06:33,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:06:33,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:34,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:06:34,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:34,817 INFO L134 CoverageAnalysis]: Checked inductivity of 7656 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:34,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:06:34,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057763729] [2022-04-06 20:06:34,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057763729] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:06:34,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046605626] [2022-04-06 20:06:34,817 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:06:34,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:06:34,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:06:34,818 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:06:34,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-04-06 20:06:34,981 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 88 check-sat command(s) [2022-04-06 20:06:34,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:06:34,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 753 conjuncts, 91 conjunts are in the unsatisfiable core [2022-04-06 20:06:34,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:06:35,180 INFO L134 CoverageAnalysis]: Checked inductivity of 7656 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:35,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:06:40,039 INFO L134 CoverageAnalysis]: Checked inductivity of 7656 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:40,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046605626] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:06:40,040 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:06:40,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 92, 92] total 184 [2022-04-06 20:06:40,040 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:06:40,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2055747832] [2022-04-06 20:06:40,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2055747832] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:06:40,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:06:40,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-04-06 20:06:40,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037036781] [2022-04-06 20:06:40,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:06:40,040 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-04-06 20:06:40,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:40,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-04-06 20:06:40,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15943, Invalid=17729, Unknown=0, NotChecked=0, Total=33672 [2022-04-06 20:06:40,044 INFO L87 Difference]: Start difference. First operand 450 states and 537 transitions. Second operand has 93 states, 93 states have (on average 2.010752688172043) internal successors, (187), 91 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:06:43,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:06:43,836 INFO L93 Difference]: Finished difference Result 468 states and 557 transitions. [2022-04-06 20:06:43,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-04-06 20:06:43,836 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 2.010752688172043) internal successors, (187), 91 states have internal predecessors, (187), 2 states have call successors, (3), 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 191 [2022-04-06 20:06:43,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:06:43,837 INFO L225 Difference]: With dead ends: 468 [2022-04-06 20:06:43,838 INFO L226 Difference]: Without dead ends: 462 [2022-04-06 20:06:43,840 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 565 GetRequests, 292 SyntacticMatches, 1 SemanticMatches, 272 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5497 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=31706, Invalid=43096, Unknown=0, NotChecked=0, Total=74802 [2022-04-06 20:06:43,840 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1410 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 526 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1410 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 1154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 526 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:06:43,841 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1410 Valid, 70 Invalid, 1154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [526 Valid, 628 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:06:43,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-04-06 20:06:44,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 455. [2022-04-06 20:06:44,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 450 states have (on average 1.1977777777777778) internal successors, (539), 450 states have internal predecessors, (539), 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) [2022-04-06 20:06:44,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 543 transitions. [2022-04-06 20:06:44,113 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 543 transitions. Word has length 191 [2022-04-06 20:06:44,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:06:44,113 INFO L478 AbstractCegarLoop]: Abstraction has 455 states and 543 transitions. [2022-04-06 20:06:44,113 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 2.010752688172043) internal successors, (187), 91 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:06:44,113 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 543 transitions. [2022-04-06 20:06:44,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-04-06 20:06:44,114 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:06:44,114 INFO L499 BasicCegarLoop]: trace histogram [89, 88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:06:44,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-04-06 20:06:44,327 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:06:44,327 INFO L403 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:06:44,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:06:44,328 INFO L85 PathProgramCache]: Analyzing trace with hash 227000961, now seen corresponding path program 175 times [2022-04-06 20:06:44,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:44,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1766813633] [2022-04-06 20:06:44,328 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:06:44,328 INFO L85 PathProgramCache]: Analyzing trace with hash 227000961, now seen corresponding path program 176 times [2022-04-06 20:06:44,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:06:44,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564050865] [2022-04-06 20:06:44,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:06:44,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:06:44,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:46,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:06:46,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:46,473 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:46,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:06:46,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564050865] [2022-04-06 20:06:46,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564050865] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:06:46,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170643448] [2022-04-06 20:06:46,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:06:46,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:06:46,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:06:46,475 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:06:46,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-04-06 20:06:46,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:06:46,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:06:46,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 92 conjunts are in the unsatisfiable core [2022-04-06 20:06:46,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:06:46,847 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:46,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:06:51,585 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:51,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170643448] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:06:51,585 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:06:51,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 93, 93] total 186 [2022-04-06 20:06:51,586 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:06:51,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1766813633] [2022-04-06 20:06:51,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1766813633] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:06:51,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:06:51,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-04-06 20:06:51,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895620125] [2022-04-06 20:06:51,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:06:51,586 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-04-06 20:06:51,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:51,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-04-06 20:06:51,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16302, Invalid=18108, Unknown=0, NotChecked=0, Total=34410 [2022-04-06 20:06:51,590 INFO L87 Difference]: Start difference. First operand 455 states and 543 transitions. Second operand has 94 states, 94 states have (on average 2.0106382978723403) internal successors, (189), 92 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:06:55,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:06:55,592 INFO L93 Difference]: Finished difference Result 473 states and 563 transitions. [2022-04-06 20:06:55,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-04-06 20:06:55,592 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.0106382978723403) internal successors, (189), 92 states have internal predecessors, (189), 2 states have call successors, (3), 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 193 [2022-04-06 20:06:55,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:06:55,593 INFO L225 Difference]: With dead ends: 473 [2022-04-06 20:06:55,593 INFO L226 Difference]: Without dead ends: 467 [2022-04-06 20:06:55,596 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 571 GetRequests, 295 SyntacticMatches, 1 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5604 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=32422, Invalid=44030, Unknown=0, NotChecked=0, Total=76452 [2022-04-06 20:06:55,596 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1324 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 498 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1324 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 1116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 498 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:06:55,596 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1324 Valid, 60 Invalid, 1116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [498 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:06:55,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2022-04-06 20:06:55,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 460. [2022-04-06 20:06:55,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 455 states have (on average 1.1978021978021978) internal successors, (545), 455 states have internal predecessors, (545), 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) [2022-04-06 20:06:55,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 549 transitions. [2022-04-06 20:06:55,875 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 549 transitions. Word has length 193 [2022-04-06 20:06:55,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:06:55,876 INFO L478 AbstractCegarLoop]: Abstraction has 460 states and 549 transitions. [2022-04-06 20:06:55,876 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 2.0106382978723403) internal successors, (189), 92 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:06:55,876 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 549 transitions. [2022-04-06 20:06:55,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-04-06 20:06:55,877 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:06:55,877 INFO L499 BasicCegarLoop]: trace histogram [90, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:06:55,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-04-06 20:06:56,090 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-04-06 20:06:56,090 INFO L403 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:06:56,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:06:56,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1253904388, now seen corresponding path program 177 times [2022-04-06 20:06:56,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:56,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1252624641] [2022-04-06 20:06:56,091 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:06:56,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1253904388, now seen corresponding path program 178 times [2022-04-06 20:06:56,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:06:56,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18150579] [2022-04-06 20:06:56,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:06:56,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:06:56,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:58,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:06:58,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:58,317 INFO L134 CoverageAnalysis]: Checked inductivity of 8010 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:58,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:06:58,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18150579] [2022-04-06 20:06:58,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18150579] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:06:58,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027929220] [2022-04-06 20:06:58,317 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:06:58,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:06:58,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:06:58,318 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:06:58,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-04-06 20:06:58,427 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:06:58,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:06:58,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 93 conjunts are in the unsatisfiable core [2022-04-06 20:06:58,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:06:58,818 INFO L134 CoverageAnalysis]: Checked inductivity of 8010 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:58,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:07:05,201 INFO L134 CoverageAnalysis]: Checked inductivity of 8010 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:05,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027929220] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:07:05,201 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:07:05,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 94, 94] total 188 [2022-04-06 20:07:05,201 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:07:05,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1252624641] [2022-04-06 20:07:05,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1252624641] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:07:05,201 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:07:05,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-04-06 20:07:05,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670930941] [2022-04-06 20:07:05,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:07:05,202 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-04-06 20:07:05,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:05,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-04-06 20:07:05,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16665, Invalid=18491, Unknown=0, NotChecked=0, Total=35156 [2022-04-06 20:07:05,204 INFO L87 Difference]: Start difference. First operand 460 states and 549 transitions. Second operand has 95 states, 95 states have (on average 2.0105263157894737) internal successors, (191), 93 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:10,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:07:10,098 INFO L93 Difference]: Finished difference Result 478 states and 569 transitions. [2022-04-06 20:07:10,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-04-06 20:07:10,098 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.0105263157894737) internal successors, (191), 93 states have internal predecessors, (191), 2 states have call successors, (3), 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 195 [2022-04-06 20:07:10,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:07:10,099 INFO L225 Difference]: With dead ends: 478 [2022-04-06 20:07:10,099 INFO L226 Difference]: Without dead ends: 472 [2022-04-06 20:07:10,102 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 577 GetRequests, 298 SyntacticMatches, 1 SemanticMatches, 278 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5712 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=33146, Invalid=44974, Unknown=0, NotChecked=0, Total=78120 [2022-04-06 20:07:10,102 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1319 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 497 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1319 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 497 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:07:10,102 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1319 Valid, 45 Invalid, 1102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [497 Valid, 605 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:07:10,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2022-04-06 20:07:10,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 465. [2022-04-06 20:07:10,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 460 states have (on average 1.1978260869565218) internal successors, (551), 460 states have internal predecessors, (551), 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) [2022-04-06 20:07:10,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 555 transitions. [2022-04-06 20:07:10,387 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 555 transitions. Word has length 195 [2022-04-06 20:07:10,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:07:10,387 INFO L478 AbstractCegarLoop]: Abstraction has 465 states and 555 transitions. [2022-04-06 20:07:10,387 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.0105263157894737) internal successors, (191), 93 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:10,388 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 555 transitions. [2022-04-06 20:07:10,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-04-06 20:07:10,388 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:07:10,388 INFO L499 BasicCegarLoop]: trace histogram [91, 90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:07:10,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-04-06 20:07:10,604 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:07:10,605 INFO L403 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:07:10,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:07:10,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1525197495, now seen corresponding path program 179 times [2022-04-06 20:07:10,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:10,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [999768611] [2022-04-06 20:07:10,605 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:07:10,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1525197495, now seen corresponding path program 180 times [2022-04-06 20:07:10,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:07:10,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090891628] [2022-04-06 20:07:10,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:07:10,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:07:10,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:12,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:07:12,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:12,186 INFO L134 CoverageAnalysis]: Checked inductivity of 8190 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:12,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:07:12,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090891628] [2022-04-06 20:07:12,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090891628] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:07:12,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005121868] [2022-04-06 20:07:12,186 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:07:12,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:07:12,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:07:12,187 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:07:12,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-04-06 20:07:12,354 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 91 check-sat command(s) [2022-04-06 20:07:12,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:07:12,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 777 conjuncts, 94 conjunts are in the unsatisfiable core [2022-04-06 20:07:12,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:07:12,562 INFO L134 CoverageAnalysis]: Checked inductivity of 8190 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:12,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:07:17,085 INFO L134 CoverageAnalysis]: Checked inductivity of 8190 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:17,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005121868] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:07:17,086 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:07:17,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 95, 95] total 190 [2022-04-06 20:07:17,086 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:07:17,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [999768611] [2022-04-06 20:07:17,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [999768611] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:07:17,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:07:17,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-04-06 20:07:17,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017359094] [2022-04-06 20:07:17,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:07:17,087 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-04-06 20:07:17,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:17,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-04-06 20:07:17,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17032, Invalid=18878, Unknown=0, NotChecked=0, Total=35910 [2022-04-06 20:07:17,091 INFO L87 Difference]: Start difference. First operand 465 states and 555 transitions. Second operand has 96 states, 96 states have (on average 2.0104166666666665) internal successors, (193), 94 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:21,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:07:21,125 INFO L93 Difference]: Finished difference Result 483 states and 575 transitions. [2022-04-06 20:07:21,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-04-06 20:07:21,126 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.0104166666666665) internal successors, (193), 94 states have internal predecessors, (193), 2 states have call successors, (3), 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 197 [2022-04-06 20:07:21,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:07:21,127 INFO L225 Difference]: With dead ends: 483 [2022-04-06 20:07:21,127 INFO L226 Difference]: Without dead ends: 477 [2022-04-06 20:07:21,129 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 583 GetRequests, 301 SyntacticMatches, 1 SemanticMatches, 281 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5821 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=33878, Invalid=45928, Unknown=0, NotChecked=0, Total=79806 [2022-04-06 20:07:21,129 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1296 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 490 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1296 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 1134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 490 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:07:21,129 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1296 Valid, 70 Invalid, 1134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [490 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:07:21,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2022-04-06 20:07:21,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 470. [2022-04-06 20:07:21,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 465 states have (on average 1.1978494623655913) internal successors, (557), 465 states have internal predecessors, (557), 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) [2022-04-06 20:07:21,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 561 transitions. [2022-04-06 20:07:21,410 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 561 transitions. Word has length 197 [2022-04-06 20:07:21,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:07:21,410 INFO L478 AbstractCegarLoop]: Abstraction has 470 states and 561 transitions. [2022-04-06 20:07:21,410 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.0104166666666665) internal successors, (193), 94 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:21,410 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 561 transitions. [2022-04-06 20:07:21,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-04-06 20:07:21,411 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:07:21,411 INFO L499 BasicCegarLoop]: trace histogram [92, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:07:21,427 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-04-06 20:07:21,627 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:07:21,628 INFO L403 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:07:21,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:07:21,628 INFO L85 PathProgramCache]: Analyzing trace with hash 772448946, now seen corresponding path program 181 times [2022-04-06 20:07:21,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:21,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1576495414] [2022-04-06 20:07:21,628 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:07:21,628 INFO L85 PathProgramCache]: Analyzing trace with hash 772448946, now seen corresponding path program 182 times [2022-04-06 20:07:21,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:07:21,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053792994] [2022-04-06 20:07:21,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:07:21,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:07:21,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:24,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:07:24,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:24,134 INFO L134 CoverageAnalysis]: Checked inductivity of 8372 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:24,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:07:24,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053792994] [2022-04-06 20:07:24,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053792994] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:07:24,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863474526] [2022-04-06 20:07:24,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:07:24,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:07:24,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:07:24,135 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:07:24,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-04-06 20:07:24,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:07:24,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:07:24,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 785 conjuncts, 95 conjunts are in the unsatisfiable core [2022-04-06 20:07:24,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:07:24,570 INFO L134 CoverageAnalysis]: Checked inductivity of 8372 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:24,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:07:31,407 INFO L134 CoverageAnalysis]: Checked inductivity of 8372 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:31,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863474526] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:07:31,407 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:07:31,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 96, 96] total 192 [2022-04-06 20:07:31,407 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:07:31,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1576495414] [2022-04-06 20:07:31,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1576495414] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:07:31,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:07:31,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-04-06 20:07:31,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741840717] [2022-04-06 20:07:31,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:07:31,408 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-04-06 20:07:31,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:31,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-04-06 20:07:31,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17403, Invalid=19269, Unknown=0, NotChecked=0, Total=36672 [2022-04-06 20:07:31,411 INFO L87 Difference]: Start difference. First operand 470 states and 561 transitions. Second operand has 97 states, 97 states have (on average 2.0103092783505154) internal successors, (195), 95 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:36,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:07:36,468 INFO L93 Difference]: Finished difference Result 488 states and 581 transitions. [2022-04-06 20:07:36,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-04-06 20:07:36,468 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.0103092783505154) internal successors, (195), 95 states have internal predecessors, (195), 2 states have call successors, (3), 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 199 [2022-04-06 20:07:36,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:07:36,470 INFO L225 Difference]: With dead ends: 488 [2022-04-06 20:07:36,471 INFO L226 Difference]: Without dead ends: 482 [2022-04-06 20:07:36,474 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 589 GetRequests, 304 SyntacticMatches, 1 SemanticMatches, 284 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5931 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=34618, Invalid=46892, Unknown=0, NotChecked=0, Total=81510 [2022-04-06 20:07:36,474 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1447 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 541 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1447 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 541 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:07:36,474 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1447 Valid, 55 Invalid, 1172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [541 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:07:36,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2022-04-06 20:07:36,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 475. [2022-04-06 20:07:36,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 470 states have (on average 1.1978723404255318) internal successors, (563), 470 states have internal predecessors, (563), 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) [2022-04-06 20:07:36,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 567 transitions. [2022-04-06 20:07:36,772 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 567 transitions. Word has length 199 [2022-04-06 20:07:36,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:07:36,772 INFO L478 AbstractCegarLoop]: Abstraction has 475 states and 567 transitions. [2022-04-06 20:07:36,772 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.0103092783505154) internal successors, (195), 95 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:36,772 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 567 transitions. [2022-04-06 20:07:36,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-04-06 20:07:36,773 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:07:36,773 INFO L499 BasicCegarLoop]: trace histogram [93, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:07:36,790 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-04-06 20:07:36,990 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:07:36,990 INFO L403 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:07:36,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:07:36,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1064400915, now seen corresponding path program 183 times [2022-04-06 20:07:36,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:36,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1989928546] [2022-04-06 20:07:36,991 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:07:36,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1064400915, now seen corresponding path program 184 times [2022-04-06 20:07:36,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:07:36,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977730289] [2022-04-06 20:07:36,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:07:36,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:07:37,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:39,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:07:39,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:39,628 INFO L134 CoverageAnalysis]: Checked inductivity of 8556 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:39,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:07:39,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977730289] [2022-04-06 20:07:39,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977730289] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:07:39,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286915346] [2022-04-06 20:07:39,628 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:07:39,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:07:39,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:07:39,630 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:07:39,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-04-06 20:07:39,734 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:07:39,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:07:39,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 793 conjuncts, 96 conjunts are in the unsatisfiable core [2022-04-06 20:07:39,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:07:40,016 INFO L134 CoverageAnalysis]: Checked inductivity of 8556 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:40,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:07:45,156 INFO L134 CoverageAnalysis]: Checked inductivity of 8556 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:45,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286915346] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:07:45,156 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:07:45,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 97, 97] total 194 [2022-04-06 20:07:45,158 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:07:45,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1989928546] [2022-04-06 20:07:45,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1989928546] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:07:45,158 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:07:45,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-04-06 20:07:45,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260922294] [2022-04-06 20:07:45,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:07:45,159 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-04-06 20:07:45,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:45,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-04-06 20:07:45,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17778, Invalid=19664, Unknown=0, NotChecked=0, Total=37442 [2022-04-06 20:07:45,162 INFO L87 Difference]: Start difference. First operand 475 states and 567 transitions. Second operand has 98 states, 98 states have (on average 2.010204081632653) internal successors, (197), 96 states have internal predecessors, (197), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:49,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:07:49,982 INFO L93 Difference]: Finished difference Result 493 states and 587 transitions. [2022-04-06 20:07:49,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-04-06 20:07:49,983 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.010204081632653) internal successors, (197), 96 states have internal predecessors, (197), 2 states have call successors, (3), 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 201 [2022-04-06 20:07:49,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:07:49,984 INFO L225 Difference]: With dead ends: 493 [2022-04-06 20:07:49,984 INFO L226 Difference]: Without dead ends: 487 [2022-04-06 20:07:49,986 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 595 GetRequests, 307 SyntacticMatches, 1 SemanticMatches, 287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6042 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=35366, Invalid=47866, Unknown=0, NotChecked=0, Total=83232 [2022-04-06 20:07:49,987 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1481 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 553 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1481 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 553 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:07:49,987 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1481 Valid, 45 Invalid, 1176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [553 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:07:49,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2022-04-06 20:07:50,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 480. [2022-04-06 20:07:50,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 475 states have (on average 1.1978947368421053) internal successors, (569), 475 states have internal predecessors, (569), 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) [2022-04-06 20:07:50,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 573 transitions. [2022-04-06 20:07:50,280 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 573 transitions. Word has length 201 [2022-04-06 20:07:50,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:07:50,281 INFO L478 AbstractCegarLoop]: Abstraction has 480 states and 573 transitions. [2022-04-06 20:07:50,281 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.010204081632653) internal successors, (197), 96 states have internal predecessors, (197), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:50,281 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 573 transitions. [2022-04-06 20:07:50,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-04-06 20:07:50,282 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:07:50,282 INFO L499 BasicCegarLoop]: trace histogram [94, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:07:50,298 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-04-06 20:07:50,495 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:07:50,495 INFO L403 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:07:50,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:07:50,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1045558680, now seen corresponding path program 185 times [2022-04-06 20:07:50,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:50,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1344764381] [2022-04-06 20:07:50,496 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:07:50,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1045558680, now seen corresponding path program 186 times [2022-04-06 20:07:50,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:07:50,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651140478] [2022-04-06 20:07:50,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:07:50,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:07:50,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:52,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:07:52,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:52,773 INFO L134 CoverageAnalysis]: Checked inductivity of 8742 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:52,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:07:52,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651140478] [2022-04-06 20:07:52,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651140478] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:07:52,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229193356] [2022-04-06 20:07:52,774 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:07:52,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:07:52,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:07:52,775 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:07:52,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-04-06 20:07:52,960 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 94 check-sat command(s) [2022-04-06 20:07:52,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:07:52,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 97 conjunts are in the unsatisfiable core [2022-04-06 20:07:52,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:07:53,249 INFO L134 CoverageAnalysis]: Checked inductivity of 8742 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:53,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:07:58,368 INFO L134 CoverageAnalysis]: Checked inductivity of 8742 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:58,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229193356] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:07:58,368 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:07:58,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 98, 98] total 196 [2022-04-06 20:07:58,368 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:07:58,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1344764381] [2022-04-06 20:07:58,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1344764381] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:07:58,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:07:58,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-04-06 20:07:58,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825020621] [2022-04-06 20:07:58,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:07:58,369 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-04-06 20:07:58,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:58,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-04-06 20:07:58,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18157, Invalid=20063, Unknown=0, NotChecked=0, Total=38220 [2022-04-06 20:07:58,373 INFO L87 Difference]: Start difference. First operand 480 states and 573 transitions. Second operand has 99 states, 99 states have (on average 2.01010101010101) internal successors, (199), 97 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:03,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:08:03,474 INFO L93 Difference]: Finished difference Result 498 states and 593 transitions. [2022-04-06 20:08:03,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-04-06 20:08:03,474 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.01010101010101) internal successors, (199), 97 states have internal predecessors, (199), 2 states have call successors, (3), 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 203 [2022-04-06 20:08:03,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:08:03,476 INFO L225 Difference]: With dead ends: 498 [2022-04-06 20:08:03,476 INFO L226 Difference]: Without dead ends: 492 [2022-04-06 20:08:03,478 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 601 GetRequests, 310 SyntacticMatches, 1 SemanticMatches, 290 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6154 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=36122, Invalid=48850, Unknown=0, NotChecked=0, Total=84972 [2022-04-06 20:08:03,478 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1479 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 553 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1479 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 553 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:08:03,479 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1479 Valid, 40 Invalid, 1177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [553 Valid, 624 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:08:03,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2022-04-06 20:08:03,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 485. [2022-04-06 20:08:03,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 480 states have (on average 1.1979166666666667) internal successors, (575), 480 states have internal predecessors, (575), 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) [2022-04-06 20:08:03,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 579 transitions. [2022-04-06 20:08:03,790 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 579 transitions. Word has length 203 [2022-04-06 20:08:03,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:08:03,790 INFO L478 AbstractCegarLoop]: Abstraction has 485 states and 579 transitions. [2022-04-06 20:08:03,790 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.01010101010101) internal successors, (199), 97 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:03,790 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 579 transitions. [2022-04-06 20:08:03,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-04-06 20:08:03,791 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:08:03,791 INFO L499 BasicCegarLoop]: trace histogram [95, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:08:03,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-04-06 20:08:04,008 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:08:04,009 INFO L403 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:08:04,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:08:04,009 INFO L85 PathProgramCache]: Analyzing trace with hash -118040029, now seen corresponding path program 187 times [2022-04-06 20:08:04,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:08:04,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1429330783] [2022-04-06 20:08:04,009 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:08:04,009 INFO L85 PathProgramCache]: Analyzing trace with hash -118040029, now seen corresponding path program 188 times [2022-04-06 20:08:04,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:08:04,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922018565] [2022-04-06 20:08:04,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:08:04,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:08:04,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:08:06,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:08:06,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:08:06,341 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:08:06,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:08:06,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922018565] [2022-04-06 20:08:06,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922018565] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:08:06,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6559069] [2022-04-06 20:08:06,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:08:06,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:08:06,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:08:06,343 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:08:06,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-04-06 20:08:06,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:08:06,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:08:06,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 809 conjuncts, 98 conjunts are in the unsatisfiable core [2022-04-06 20:08:06,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:08:06,712 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:08:06,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:08:11,746 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:08:11,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6559069] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:08:11,747 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:08:11,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 99, 99] total 198 [2022-04-06 20:08:11,747 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:08:11,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1429330783] [2022-04-06 20:08:11,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1429330783] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:08:11,747 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:08:11,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-04-06 20:08:11,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627403180] [2022-04-06 20:08:11,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:08:11,747 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-04-06 20:08:11,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:08:11,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-04-06 20:08:11,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18540, Invalid=20466, Unknown=0, NotChecked=0, Total=39006 [2022-04-06 20:08:11,750 INFO L87 Difference]: Start difference. First operand 485 states and 579 transitions. Second operand has 100 states, 100 states have (on average 2.01) internal successors, (201), 98 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:17,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:08:17,492 INFO L93 Difference]: Finished difference Result 503 states and 599 transitions. [2022-04-06 20:08:17,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-04-06 20:08:17,493 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.01) internal successors, (201), 98 states have internal predecessors, (201), 2 states have call successors, (3), 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 205 [2022-04-06 20:08:17,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:08:17,494 INFO L225 Difference]: With dead ends: 503 [2022-04-06 20:08:17,494 INFO L226 Difference]: Without dead ends: 497 [2022-04-06 20:08:17,497 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 607 GetRequests, 313 SyntacticMatches, 1 SemanticMatches, 293 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6267 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=36886, Invalid=49844, Unknown=0, NotChecked=0, Total=86730 [2022-04-06 20:08:17,497 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1624 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 602 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1624 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 602 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:08:17,497 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1624 Valid, 55 Invalid, 1249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [602 Valid, 647 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:08:17,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2022-04-06 20:08:17,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 490. [2022-04-06 20:08:17,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 485 states have (on average 1.1979381443298969) internal successors, (581), 485 states have internal predecessors, (581), 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) [2022-04-06 20:08:17,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 585 transitions. [2022-04-06 20:08:17,814 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 585 transitions. Word has length 205 [2022-04-06 20:08:17,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:08:17,814 INFO L478 AbstractCegarLoop]: Abstraction has 490 states and 585 transitions. [2022-04-06 20:08:17,814 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 2.01) internal successors, (201), 98 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:17,814 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 585 transitions. [2022-04-06 20:08:17,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-04-06 20:08:17,815 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:08:17,815 INFO L499 BasicCegarLoop]: trace histogram [96, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:08:17,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2022-04-06 20:08:18,031 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2022-04-06 20:08:18,031 INFO L403 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:08:18,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:08:18,032 INFO L85 PathProgramCache]: Analyzing trace with hash -2125813986, now seen corresponding path program 189 times [2022-04-06 20:08:18,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:08:18,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [740887900] [2022-04-06 20:08:18,032 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:08:18,032 INFO L85 PathProgramCache]: Analyzing trace with hash -2125813986, now seen corresponding path program 190 times [2022-04-06 20:08:18,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:08:18,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446049916] [2022-04-06 20:08:18,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:08:18,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:08:18,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:08:20,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:08:20,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:08:20,387 INFO L134 CoverageAnalysis]: Checked inductivity of 9120 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:08:20,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:08:20,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446049916] [2022-04-06 20:08:20,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446049916] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:08:20,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948641846] [2022-04-06 20:08:20,388 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:08:20,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:08:20,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:08:20,390 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:08:20,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-04-06 20:08:20,514 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:08:20,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:08:20,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 817 conjuncts, 99 conjunts are in the unsatisfiable core [2022-04-06 20:08:20,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:08:20,731 INFO L134 CoverageAnalysis]: Checked inductivity of 9120 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:08:20,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:08:25,747 INFO L134 CoverageAnalysis]: Checked inductivity of 9120 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:08:25,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948641846] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:08:25,747 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:08:25,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 100, 100] total 200 [2022-04-06 20:08:25,748 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:08:25,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [740887900] [2022-04-06 20:08:25,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [740887900] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:08:25,748 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:08:25,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-04-06 20:08:25,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822123154] [2022-04-06 20:08:25,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:08:25,749 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-04-06 20:08:25,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:08:25,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-04-06 20:08:25,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18927, Invalid=20873, Unknown=0, NotChecked=0, Total=39800 [2022-04-06 20:08:25,752 INFO L87 Difference]: Start difference. First operand 490 states and 585 transitions. Second operand has 101 states, 101 states have (on average 2.00990099009901) internal successors, (203), 99 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:30,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:08:30,466 INFO L93 Difference]: Finished difference Result 508 states and 605 transitions. [2022-04-06 20:08:30,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-04-06 20:08:30,466 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.00990099009901) internal successors, (203), 99 states have internal predecessors, (203), 2 states have call successors, (3), 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 207 [2022-04-06 20:08:30,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:08:30,467 INFO L225 Difference]: With dead ends: 508 [2022-04-06 20:08:30,467 INFO L226 Difference]: Without dead ends: 502 [2022-04-06 20:08:30,470 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 613 GetRequests, 316 SyntacticMatches, 1 SemanticMatches, 296 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6381 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=37658, Invalid=50848, Unknown=0, NotChecked=0, Total=88506 [2022-04-06 20:08:30,470 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1526 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 570 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1526 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 570 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:08:30,470 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1526 Valid, 55 Invalid, 1227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [570 Valid, 657 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:08:30,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2022-04-06 20:08:30,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 495. [2022-04-06 20:08:30,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 490 states have (on average 1.1979591836734693) internal successors, (587), 490 states have internal predecessors, (587), 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) [2022-04-06 20:08:30,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 591 transitions. [2022-04-06 20:08:30,798 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 591 transitions. Word has length 207 [2022-04-06 20:08:30,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:08:30,798 INFO L478 AbstractCegarLoop]: Abstraction has 495 states and 591 transitions. [2022-04-06 20:08:30,798 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.00990099009901) internal successors, (203), 99 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:30,798 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 591 transitions. [2022-04-06 20:08:30,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-04-06 20:08:30,799 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:08:30,799 INFO L499 BasicCegarLoop]: trace histogram [97, 96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:08:30,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-04-06 20:08:31,011 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2022-04-06 20:08:31,012 INFO L403 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:08:31,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:08:31,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1138696537, now seen corresponding path program 191 times [2022-04-06 20:08:31,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:08:31,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1564096959] [2022-04-06 20:08:31,013 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:08:31,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1138696537, now seen corresponding path program 192 times [2022-04-06 20:08:31,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:08:31,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743084634] [2022-04-06 20:08:31,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:08:31,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:08:31,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:08:33,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:08:33,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:08:33,629 INFO L134 CoverageAnalysis]: Checked inductivity of 9312 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:08:33,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:08:33,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743084634] [2022-04-06 20:08:33,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743084634] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:08:33,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205109640] [2022-04-06 20:08:33,630 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:08:33,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:08:33,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:08:33,632 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:08:33,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-04-06 20:08:33,811 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 97 check-sat command(s) [2022-04-06 20:08:33,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:08:33,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 825 conjuncts, 100 conjunts are in the unsatisfiable core [2022-04-06 20:08:33,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:08:34,035 INFO L134 CoverageAnalysis]: Checked inductivity of 9312 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:08:34,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:08:39,379 INFO L134 CoverageAnalysis]: Checked inductivity of 9312 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:08:39,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205109640] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:08:39,380 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:08:39,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 101, 101] total 202 [2022-04-06 20:08:39,380 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:08:39,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1564096959] [2022-04-06 20:08:39,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1564096959] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:08:39,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:08:39,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-04-06 20:08:39,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879182000] [2022-04-06 20:08:39,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:08:39,380 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-04-06 20:08:39,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:08:39,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-04-06 20:08:39,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19318, Invalid=21284, Unknown=0, NotChecked=0, Total=40602 [2022-04-06 20:08:39,383 INFO L87 Difference]: Start difference. First operand 495 states and 591 transitions. Second operand has 102 states, 102 states have (on average 2.0098039215686274) internal successors, (205), 100 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:44,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:08:44,693 INFO L93 Difference]: Finished difference Result 513 states and 611 transitions. [2022-04-06 20:08:44,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-04-06 20:08:44,693 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.0098039215686274) internal successors, (205), 100 states have internal predecessors, (205), 2 states have call successors, (3), 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 209 [2022-04-06 20:08:44,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:08:44,694 INFO L225 Difference]: With dead ends: 513 [2022-04-06 20:08:44,694 INFO L226 Difference]: Without dead ends: 507 [2022-04-06 20:08:44,697 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 619 GetRequests, 319 SyntacticMatches, 1 SemanticMatches, 299 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6496 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=38438, Invalid=51862, Unknown=0, NotChecked=0, Total=90300 [2022-04-06 20:08:44,699 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1554 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 580 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1554 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 1246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 580 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:08:44,700 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1554 Valid, 60 Invalid, 1246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [580 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:08:44,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2022-04-06 20:08:45,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 500. [2022-04-06 20:08:45,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 495 states have (on average 1.197979797979798) internal successors, (593), 495 states have internal predecessors, (593), 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) [2022-04-06 20:08:45,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 597 transitions. [2022-04-06 20:08:45,032 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 597 transitions. Word has length 209 [2022-04-06 20:08:45,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:08:45,032 INFO L478 AbstractCegarLoop]: Abstraction has 500 states and 597 transitions. [2022-04-06 20:08:45,032 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 2.0098039215686274) internal successors, (205), 100 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:45,032 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 597 transitions. [2022-04-06 20:08:45,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-04-06 20:08:45,033 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:08:45,033 INFO L499 BasicCegarLoop]: trace histogram [98, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:08:45,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-04-06 20:08:45,250 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:08:45,250 INFO L403 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:08:45,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:08:45,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1287784236, now seen corresponding path program 193 times [2022-04-06 20:08:45,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:08:45,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [725108403] [2022-04-06 20:08:45,251 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:08:45,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1287784236, now seen corresponding path program 194 times [2022-04-06 20:08:45,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:08:45,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662871449] [2022-04-06 20:08:45,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:08:45,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:08:45,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:08:48,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:08:48,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:08:48,187 INFO L134 CoverageAnalysis]: Checked inductivity of 9506 backedges. 0 proven. 9506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:08:48,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:08:48,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662871449] [2022-04-06 20:08:48,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662871449] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:08:48,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781781077] [2022-04-06 20:08:48,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:08:48,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:08:48,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:08:48,188 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:08:48,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-04-06 20:08:48,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:08:48,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:08:48,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 833 conjuncts, 101 conjunts are in the unsatisfiable core [2022-04-06 20:08:48,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:08:48,595 INFO L134 CoverageAnalysis]: Checked inductivity of 9506 backedges. 0 proven. 9506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:08:48,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:08:54,451 INFO L134 CoverageAnalysis]: Checked inductivity of 9506 backedges. 0 proven. 9506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:08:54,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781781077] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:08:54,452 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:08:54,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 102, 102] total 204 [2022-04-06 20:08:54,452 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:08:54,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [725108403] [2022-04-06 20:08:54,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [725108403] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:08:54,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:08:54,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2022-04-06 20:08:54,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354102085] [2022-04-06 20:08:54,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:08:54,453 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-04-06 20:08:54,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:08:54,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-04-06 20:08:54,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19713, Invalid=21699, Unknown=0, NotChecked=0, Total=41412 [2022-04-06 20:08:54,455 INFO L87 Difference]: Start difference. First operand 500 states and 597 transitions. Second operand has 103 states, 103 states have (on average 2.0097087378640777) internal successors, (207), 101 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:59,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:08:59,524 INFO L93 Difference]: Finished difference Result 518 states and 617 transitions. [2022-04-06 20:08:59,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-04-06 20:08:59,525 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.0097087378640777) internal successors, (207), 101 states have internal predecessors, (207), 2 states have call successors, (3), 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 211 [2022-04-06 20:08:59,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:08:59,526 INFO L225 Difference]: With dead ends: 518 [2022-04-06 20:08:59,526 INFO L226 Difference]: Without dead ends: 512 [2022-04-06 20:08:59,529 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 625 GetRequests, 322 SyntacticMatches, 1 SemanticMatches, 302 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6612 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=39226, Invalid=52886, Unknown=0, NotChecked=0, Total=92112 [2022-04-06 20:08:59,530 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1699 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 629 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1699 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 629 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:08:59,530 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1699 Valid, 50 Invalid, 1295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [629 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:08:59,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2022-04-06 20:08:59,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 505. [2022-04-06 20:08:59,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 500 states have (on average 1.198) internal successors, (599), 500 states have internal predecessors, (599), 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) [2022-04-06 20:08:59,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 603 transitions. [2022-04-06 20:08:59,870 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 603 transitions. Word has length 211 [2022-04-06 20:08:59,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:08:59,870 INFO L478 AbstractCegarLoop]: Abstraction has 505 states and 603 transitions. [2022-04-06 20:08:59,870 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 2.0097087378640777) internal successors, (207), 101 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:59,870 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 603 transitions. [2022-04-06 20:08:59,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-04-06 20:08:59,872 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:08:59,873 INFO L499 BasicCegarLoop]: trace histogram [99, 98, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:08:59,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-04-06 20:09:00,074 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:09:00,074 INFO L403 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:09:00,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:09:00,074 INFO L85 PathProgramCache]: Analyzing trace with hash -968565361, now seen corresponding path program 195 times [2022-04-06 20:09:00,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:09:00,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [446488107] [2022-04-06 20:09:00,075 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:09:00,075 INFO L85 PathProgramCache]: Analyzing trace with hash -968565361, now seen corresponding path program 196 times [2022-04-06 20:09:00,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:09:00,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493055569] [2022-04-06 20:09:00,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:09:00,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:09:00,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:09:01,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:09:01,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:09:01,929 INFO L134 CoverageAnalysis]: Checked inductivity of 9702 backedges. 0 proven. 9702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:09:01,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:09:01,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493055569] [2022-04-06 20:09:01,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493055569] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:09:01,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224526600] [2022-04-06 20:09:01,929 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:09:01,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:09:01,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:09:01,930 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:09:01,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-04-06 20:09:02,028 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:09:02,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:09:02,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 102 conjunts are in the unsatisfiable core [2022-04-06 20:09:02,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:09:02,248 INFO L134 CoverageAnalysis]: Checked inductivity of 9702 backedges. 0 proven. 9702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:09:02,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:09:07,553 INFO L134 CoverageAnalysis]: Checked inductivity of 9702 backedges. 0 proven. 9702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:09:07,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224526600] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:09:07,553 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:09:07,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 103, 103] total 206 [2022-04-06 20:09:07,553 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:09:07,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [446488107] [2022-04-06 20:09:07,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [446488107] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:09:07,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:09:07,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2022-04-06 20:09:07,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581366741] [2022-04-06 20:09:07,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:09:07,554 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-04-06 20:09:07,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:09:07,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-04-06 20:09:07,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20112, Invalid=22118, Unknown=0, NotChecked=0, Total=42230 [2022-04-06 20:09:07,558 INFO L87 Difference]: Start difference. First operand 505 states and 603 transitions. Second operand has 104 states, 104 states have (on average 2.0096153846153846) internal successors, (209), 102 states have internal predecessors, (209), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:09:12,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:09:12,789 INFO L93 Difference]: Finished difference Result 523 states and 623 transitions. [2022-04-06 20:09:12,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-04-06 20:09:12,789 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.0096153846153846) internal successors, (209), 102 states have internal predecessors, (209), 2 states have call successors, (3), 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 213 [2022-04-06 20:09:12,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:09:12,791 INFO L225 Difference]: With dead ends: 523 [2022-04-06 20:09:12,791 INFO L226 Difference]: Without dead ends: 517 [2022-04-06 20:09:12,794 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 631 GetRequests, 325 SyntacticMatches, 1 SemanticMatches, 305 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6729 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=40022, Invalid=53920, Unknown=0, NotChecked=0, Total=93942 [2022-04-06 20:09:12,794 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1748 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 646 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1748 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 646 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:09:12,794 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1748 Valid, 45 Invalid, 1303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [646 Valid, 657 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:09:12,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2022-04-06 20:09:13,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 510. [2022-04-06 20:09:13,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 505 states have (on average 1.198019801980198) internal successors, (605), 505 states have internal predecessors, (605), 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) [2022-04-06 20:09:13,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 609 transitions. [2022-04-06 20:09:13,138 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 609 transitions. Word has length 213 [2022-04-06 20:09:13,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:09:13,138 INFO L478 AbstractCegarLoop]: Abstraction has 510 states and 609 transitions. [2022-04-06 20:09:13,139 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.0096153846153846) internal successors, (209), 102 states have internal predecessors, (209), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:09:13,139 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 609 transitions. [2022-04-06 20:09:13,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-04-06 20:09:13,140 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:09:13,140 INFO L499 BasicCegarLoop]: trace histogram [100, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:09:13,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-04-06 20:09:13,356 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2022-04-06 20:09:13,357 INFO L403 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:09:13,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:09:13,357 INFO L85 PathProgramCache]: Analyzing trace with hash 858095498, now seen corresponding path program 197 times [2022-04-06 20:09:13,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:09:13,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1735078524] [2022-04-06 20:09:13,358 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:09:13,358 INFO L85 PathProgramCache]: Analyzing trace with hash 858095498, now seen corresponding path program 198 times [2022-04-06 20:09:13,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:09:13,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397255380] [2022-04-06 20:09:13,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:09:13,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:09:13,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:09:16,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:09:16,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:09:16,370 INFO L134 CoverageAnalysis]: Checked inductivity of 9900 backedges. 0 proven. 9900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:09:16,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:09:16,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397255380] [2022-04-06 20:09:16,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397255380] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:09:16,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328326944] [2022-04-06 20:09:16,371 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:09:16,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:09:16,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:09:16,372 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:09:16,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-04-06 20:09:16,563 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 100 check-sat command(s) [2022-04-06 20:09:16,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:09:16,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 103 conjunts are in the unsatisfiable core [2022-04-06 20:09:16,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:09:16,969 INFO L134 CoverageAnalysis]: Checked inductivity of 9900 backedges. 0 proven. 9900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:09:16,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:09:23,085 INFO L134 CoverageAnalysis]: Checked inductivity of 9900 backedges. 0 proven. 9900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:09:23,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328326944] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:09:23,085 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:09:23,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 104, 104] total 208 [2022-04-06 20:09:23,085 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:09:23,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1735078524] [2022-04-06 20:09:23,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1735078524] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:09:23,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:09:23,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2022-04-06 20:09:23,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547612272] [2022-04-06 20:09:23,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:09:23,101 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-04-06 20:09:23,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:09:23,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-04-06 20:09:23,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20515, Invalid=22541, Unknown=0, NotChecked=0, Total=43056 [2022-04-06 20:09:23,105 INFO L87 Difference]: Start difference. First operand 510 states and 609 transitions. Second operand has 105 states, 105 states have (on average 2.0095238095238095) internal successors, (211), 103 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:09:29,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:09:29,472 INFO L93 Difference]: Finished difference Result 526 states and 627 transitions. [2022-04-06 20:09:29,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-04-06 20:09:29,472 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.0095238095238095) internal successors, (211), 103 states have internal predecessors, (211), 2 states have call successors, (3), 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 215 [2022-04-06 20:09:29,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:09:29,474 INFO L225 Difference]: With dead ends: 526 [2022-04-06 20:09:29,474 INFO L226 Difference]: Without dead ends: 520 [2022-04-06 20:09:29,477 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 637 GetRequests, 328 SyntacticMatches, 1 SemanticMatches, 308 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6847 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=40826, Invalid=54964, Unknown=0, NotChecked=0, Total=95790 [2022-04-06 20:09:29,477 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1632 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 609 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1632 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 609 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:09:29,477 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1632 Valid, 45 Invalid, 1275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [609 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:09:29,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2022-04-06 20:09:29,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 515. [2022-04-06 20:09:29,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 510 states have (on average 1.1980392156862745) internal successors, (611), 510 states have internal predecessors, (611), 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) [2022-04-06 20:09:29,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 615 transitions. [2022-04-06 20:09:29,828 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 615 transitions. Word has length 215 [2022-04-06 20:09:29,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:09:29,828 INFO L478 AbstractCegarLoop]: Abstraction has 515 states and 615 transitions. [2022-04-06 20:09:29,829 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 2.0095238095238095) internal successors, (211), 103 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:09:29,829 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 615 transitions. [2022-04-06 20:09:29,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2022-04-06 20:09:29,829 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:09:29,829 INFO L499 BasicCegarLoop]: trace histogram [101, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:09:29,846 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2022-04-06 20:09:30,043 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:09:30,043 INFO L403 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:09:30,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:09:30,044 INFO L85 PathProgramCache]: Analyzing trace with hash -362443067, now seen corresponding path program 199 times [2022-04-06 20:09:30,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:09:30,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [687156410] [2022-04-06 20:09:30,044 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:09:30,044 INFO L85 PathProgramCache]: Analyzing trace with hash -362443067, now seen corresponding path program 200 times [2022-04-06 20:09:30,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:09:30,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943451243] [2022-04-06 20:09:30,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:09:30,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:09:30,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:09:32,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:09:32,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:09:32,585 INFO L134 CoverageAnalysis]: Checked inductivity of 10100 backedges. 0 proven. 10100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:09:32,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:09:32,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943451243] [2022-04-06 20:09:32,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943451243] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:09:32,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265862283] [2022-04-06 20:09:32,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:09:32,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:09:32,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:09:32,587 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:09:32,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-04-06 20:09:32,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:09:32,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:09:32,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 857 conjuncts, 102 conjunts are in the unsatisfiable core [2022-04-06 20:09:32,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:09:36,473 INFO L134 CoverageAnalysis]: Checked inductivity of 10100 backedges. 10100 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:09:36,473 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 20:09:36,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265862283] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:09:36,473 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 20:09:36,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [106] total 207 [2022-04-06 20:09:36,474 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:09:36,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [687156410] [2022-04-06 20:09:36,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [687156410] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:09:36,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:09:36,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2022-04-06 20:09:36,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55050622] [2022-04-06 20:09:36,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:09:36,474 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-04-06 20:09:36,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:09:36,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-04-06 20:09:36,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10511, Invalid=32131, Unknown=0, NotChecked=0, Total=42642 [2022-04-06 20:09:36,477 INFO L87 Difference]: Start difference. First operand 515 states and 615 transitions. Second operand has 103 states, 103 states have (on average 2.0679611650485437) internal successors, (213), 103 states have internal predecessors, (213), 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) [2022-04-06 20:09:48,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:09:48,231 INFO L93 Difference]: Finished difference Result 10815 states and 11013 transitions. [2022-04-06 20:09:48,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-04-06 20:09:48,247 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.0679611650485437) internal successors, (213), 103 states have internal predecessors, (213), 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 217 [2022-04-06 20:09:48,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:09:48,263 INFO L225 Difference]: With dead ends: 10815 [2022-04-06 20:09:48,263 INFO L226 Difference]: Without dead ends: 10606 [2022-04-06 20:09:48,266 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10400 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=10511, Invalid=32131, Unknown=0, NotChecked=0, Total=42642 [2022-04-06 20:09:48,266 INFO L913 BasicCegarLoop]: 117 mSDtfsCounter, 862 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 862 SdHoareTripleChecker+Valid, 655 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:09:48,266 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [862 Valid, 655 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:09:48,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10606 states. [2022-04-06 20:09:59,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10606 to 10410. [2022-04-06 20:09:59,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10410 states, 10405 states have (on average 1.0189332051898126) internal successors, (10602), 10405 states have internal predecessors, (10602), 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) [2022-04-06 20:09:59,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10410 states to 10410 states and 10606 transitions. [2022-04-06 20:09:59,370 INFO L78 Accepts]: Start accepts. Automaton has 10410 states and 10606 transitions. Word has length 217 [2022-04-06 20:09:59,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:09:59,370 INFO L478 AbstractCegarLoop]: Abstraction has 10410 states and 10606 transitions. [2022-04-06 20:09:59,371 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 2.0679611650485437) internal successors, (213), 103 states have internal predecessors, (213), 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) [2022-04-06 20:09:59,371 INFO L276 IsEmpty]: Start isEmpty. Operand 10410 states and 10606 transitions. [2022-04-06 20:09:59,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2022-04-06 20:09:59,378 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:09:59,378 INFO L499 BasicCegarLoop]: trace histogram [100, 99, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:09:59,395 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2022-04-06 20:09:59,591 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:09:59,591 INFO L403 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:09:59,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:09:59,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1594537039, now seen corresponding path program 1 times [2022-04-06 20:09:59,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:09:59,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1754958485] [2022-04-06 20:09:59,592 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:09:59,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1594537039, now seen corresponding path program 2 times [2022-04-06 20:09:59,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:09:59,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323329613] [2022-04-06 20:09:59,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:09:59,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:09:59,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:02,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:10:02,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:02,786 INFO L134 CoverageAnalysis]: Checked inductivity of 9902 backedges. 0 proven. 9902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:10:02,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:10:02,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323329613] [2022-04-06 20:10:02,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323329613] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:10:02,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114236592] [2022-04-06 20:10:02,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:10:02,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:10:02,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:10:02,788 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:10:02,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-04-06 20:10:02,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:10:02,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:10:02,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 855 conjuncts, 104 conjunts are in the unsatisfiable core [2022-04-06 20:10:02,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:10:03,355 INFO L134 CoverageAnalysis]: Checked inductivity of 9902 backedges. 0 proven. 9902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:10:03,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:10:10,018 INFO L134 CoverageAnalysis]: Checked inductivity of 9902 backedges. 0 proven. 9902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:10:10,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114236592] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:10:10,018 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:10:10,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 105, 105] total 208 [2022-04-06 20:10:10,018 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:10:10,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1754958485] [2022-04-06 20:10:10,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1754958485] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:10:10,019 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:10:10,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2022-04-06 20:10:10,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947654763] [2022-04-06 20:10:10,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:10:10,019 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-04-06 20:10:10,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:10,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-04-06 20:10:10,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20515, Invalid=22541, Unknown=0, NotChecked=0, Total=43056 [2022-04-06 20:10:10,022 INFO L87 Difference]: Start difference. First operand 10410 states and 10606 transitions. Second operand has 106 states, 106 states have (on average 2.009433962264151) internal successors, (213), 104 states have internal predecessors, (213), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:10:27,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:10:27,199 INFO L93 Difference]: Finished difference Result 10618 states and 10912 transitions. [2022-04-06 20:10:27,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-04-06 20:10:27,200 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.009433962264151) internal successors, (213), 104 states have internal predecessors, (213), 2 states have call successors, (3), 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 217 [2022-04-06 20:10:27,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:10:27,213 INFO L225 Difference]: With dead ends: 10618 [2022-04-06 20:10:27,213 INFO L226 Difference]: Without dead ends: 10411 [2022-04-06 20:10:27,217 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 643 GetRequests, 332 SyntacticMatches, 2 SemanticMatches, 309 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7055 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=41029, Invalid=55381, Unknown=0, NotChecked=0, Total=96410 [2022-04-06 20:10:27,217 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1663 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 626 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1663 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 1316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 626 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:10:27,217 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1663 Valid, 60 Invalid, 1316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [626 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:10:27,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10411 states. [2022-04-06 20:10:37,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10411 to 10405. [2022-04-06 20:10:37,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10405 states, 10400 states have (on average 1.01875) internal successors, (10595), 10400 states have internal predecessors, (10595), 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) [2022-04-06 20:10:37,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10405 states to 10405 states and 10599 transitions. [2022-04-06 20:10:37,930 INFO L78 Accepts]: Start accepts. Automaton has 10405 states and 10599 transitions. Word has length 217 [2022-04-06 20:10:37,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:10:37,930 INFO L478 AbstractCegarLoop]: Abstraction has 10405 states and 10599 transitions. [2022-04-06 20:10:37,930 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 2.009433962264151) internal successors, (213), 104 states have internal predecessors, (213), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:10:37,930 INFO L276 IsEmpty]: Start isEmpty. Operand 10405 states and 10599 transitions. [2022-04-06 20:10:37,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-04-06 20:10:37,940 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:10:37,940 INFO L499 BasicCegarLoop]: trace histogram [100, 99, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:10:37,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-04-06 20:10:38,157 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-04-06 20:10:38,157 INFO L403 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:10:38,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:10:38,157 INFO L85 PathProgramCache]: Analyzing trace with hash 645254100, now seen corresponding path program 3 times [2022-04-06 20:10:38,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:38,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [259985152] [2022-04-06 20:10:38,160 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:10:38,160 INFO L85 PathProgramCache]: Analyzing trace with hash 645254100, now seen corresponding path program 4 times [2022-04-06 20:10:38,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:10:38,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553755144] [2022-04-06 20:10:38,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:10:38,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:10:38,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:41,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:10:41,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:41,037 INFO L134 CoverageAnalysis]: Checked inductivity of 9906 backedges. 0 proven. 9906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:10:41,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:10:41,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553755144] [2022-04-06 20:10:41,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553755144] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:10:41,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999551287] [2022-04-06 20:10:41,037 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:10:41,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:10:41,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:10:41,038 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:10:41,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-04-06 20:10:41,166 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:10:41,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:10:41,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 105 conjunts are in the unsatisfiable core [2022-04-06 20:10:41,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:10:41,610 INFO L134 CoverageAnalysis]: Checked inductivity of 9906 backedges. 0 proven. 9906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:10:41,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:10:50,850 INFO L134 CoverageAnalysis]: Checked inductivity of 9906 backedges. 0 proven. 9906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:10:50,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999551287] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:10:50,851 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:10:50,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 106, 106] total 208 [2022-04-06 20:10:50,851 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:10:50,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [259985152] [2022-04-06 20:10:50,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [259985152] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:10:50,851 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:10:50,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2022-04-06 20:10:50,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966798428] [2022-04-06 20:10:50,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:10:50,852 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-04-06 20:10:50,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:50,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-04-06 20:10:50,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20515, Invalid=22541, Unknown=0, NotChecked=0, Total=43056 [2022-04-06 20:10:50,904 INFO L87 Difference]: Start difference. First operand 10405 states and 10599 transitions. Second operand has 107 states, 107 states have (on average 2.0093457943925235) internal successors, (215), 105 states have internal predecessors, (215), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:11:07,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:11:07,821 INFO L93 Difference]: Finished difference Result 10614 states and 10906 transitions. [2022-04-06 20:11:07,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-04-06 20:11:07,821 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.0093457943925235) internal successors, (215), 105 states have internal predecessors, (215), 2 states have call successors, (3), 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 219 [2022-04-06 20:11:07,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:11:07,834 INFO L225 Difference]: With dead ends: 10614 [2022-04-06 20:11:07,834 INFO L226 Difference]: Without dead ends: 10407 [2022-04-06 20:11:07,838 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 649 GetRequests, 337 SyntacticMatches, 2 SemanticMatches, 310 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7162 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=41232, Invalid=55800, Unknown=0, NotChecked=0, Total=97032 [2022-04-06 20:11:07,838 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1668 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 631 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1668 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 631 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:11:07,838 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1668 Valid, 55 Invalid, 1317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [631 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:11:07,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10407 states. [2022-04-06 20:11:18,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10407 to 10398. [2022-04-06 20:11:18,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10398 states, 10393 states have (on average 1.0185701914750314) internal successors, (10586), 10393 states have internal predecessors, (10586), 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) [2022-04-06 20:11:18,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10398 states to 10398 states and 10590 transitions. [2022-04-06 20:11:18,357 INFO L78 Accepts]: Start accepts. Automaton has 10398 states and 10590 transitions. Word has length 219 [2022-04-06 20:11:18,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:11:18,357 INFO L478 AbstractCegarLoop]: Abstraction has 10398 states and 10590 transitions. [2022-04-06 20:11:18,357 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 2.0093457943925235) internal successors, (215), 105 states have internal predecessors, (215), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:11:18,357 INFO L276 IsEmpty]: Start isEmpty. Operand 10398 states and 10590 transitions. [2022-04-06 20:11:18,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-04-06 20:11:18,365 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:11:18,367 INFO L499 BasicCegarLoop]: trace histogram [100, 99, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:11:18,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2022-04-06 20:11:18,583 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-04-06 20:11:18,584 INFO L403 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:11:18,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:11:18,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1082583527, now seen corresponding path program 5 times [2022-04-06 20:11:18,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:11:18,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1959354547] [2022-04-06 20:11:18,584 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:11:18,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1082583527, now seen corresponding path program 6 times [2022-04-06 20:11:18,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:11:18,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90703728] [2022-04-06 20:11:18,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:11:18,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:11:18,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:11:21,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:11:21,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:11:21,115 INFO L134 CoverageAnalysis]: Checked inductivity of 9912 backedges. 0 proven. 9912 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:11:21,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:11:21,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90703728] [2022-04-06 20:11:21,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90703728] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:11:21,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127056094] [2022-04-06 20:11:21,115 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:11:21,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:11:21,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:11:21,116 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:11:21,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-04-06 20:11:21,312 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 100 check-sat command(s) [2022-04-06 20:11:21,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:11:21,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 867 conjuncts, 106 conjunts are in the unsatisfiable core [2022-04-06 20:11:21,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:11:21,676 INFO L134 CoverageAnalysis]: Checked inductivity of 9912 backedges. 0 proven. 9912 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:11:21,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:11:27,286 INFO L134 CoverageAnalysis]: Checked inductivity of 9912 backedges. 0 proven. 9912 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:11:27,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127056094] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:11:27,287 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:11:27,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 107, 107] total 208 [2022-04-06 20:11:27,287 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:11:27,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1959354547] [2022-04-06 20:11:27,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1959354547] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:11:27,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:11:27,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2022-04-06 20:11:27,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505935166] [2022-04-06 20:11:27,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:11:27,287 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-04-06 20:11:27,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:11:27,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-04-06 20:11:27,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20515, Invalid=22541, Unknown=0, NotChecked=0, Total=43056 [2022-04-06 20:11:27,292 INFO L87 Difference]: Start difference. First operand 10398 states and 10590 transitions. Second operand has 108 states, 108 states have (on average 2.009259259259259) internal successors, (217), 106 states have internal predecessors, (217), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:11:44,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:11:44,028 INFO L93 Difference]: Finished difference Result 10608 states and 10898 transitions. [2022-04-06 20:11:44,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-04-06 20:11:44,028 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 2.009259259259259) internal successors, (217), 106 states have internal predecessors, (217), 2 states have call successors, (3), 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 221 [2022-04-06 20:11:44,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:11:44,058 INFO L225 Difference]: With dead ends: 10608 [2022-04-06 20:11:44,058 INFO L226 Difference]: Without dead ends: 10401 [2022-04-06 20:11:44,064 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 655 GetRequests, 342 SyntacticMatches, 2 SemanticMatches, 311 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7270 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=41435, Invalid=56221, Unknown=0, NotChecked=0, Total=97656 [2022-04-06 20:11:44,064 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1527 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 704 mSolverCounterSat, 585 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1527 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 1289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 585 IncrementalHoareTripleChecker+Valid, 704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:11:44,064 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1527 Valid, 65 Invalid, 1289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [585 Valid, 704 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:11:44,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10401 states. [2022-04-06 20:11:54,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10401 to 10389. [2022-04-06 20:11:54,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10389 states, 10384 states have (on average 1.0183936825885977) internal successors, (10575), 10384 states have internal predecessors, (10575), 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) [2022-04-06 20:11:54,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10389 states to 10389 states and 10579 transitions. [2022-04-06 20:11:54,445 INFO L78 Accepts]: Start accepts. Automaton has 10389 states and 10579 transitions. Word has length 221 [2022-04-06 20:11:54,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:11:54,445 INFO L478 AbstractCegarLoop]: Abstraction has 10389 states and 10579 transitions. [2022-04-06 20:11:54,445 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 2.009259259259259) internal successors, (217), 106 states have internal predecessors, (217), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:11:54,445 INFO L276 IsEmpty]: Start isEmpty. Operand 10389 states and 10579 transitions. [2022-04-06 20:11:54,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2022-04-06 20:11:54,468 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:11:54,469 INFO L499 BasicCegarLoop]: trace histogram [100, 99, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:11:54,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2022-04-06 20:11:54,699 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:11:54,700 INFO L403 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:11:54,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:11:54,700 INFO L85 PathProgramCache]: Analyzing trace with hash 617800478, now seen corresponding path program 7 times [2022-04-06 20:11:54,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:11:54,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [578817952] [2022-04-06 20:11:54,700 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:11:54,700 INFO L85 PathProgramCache]: Analyzing trace with hash 617800478, now seen corresponding path program 8 times [2022-04-06 20:11:54,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:11:54,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201826823] [2022-04-06 20:11:54,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:11:54,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:11:54,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:11:57,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:11:57,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:11:57,943 INFO L134 CoverageAnalysis]: Checked inductivity of 9920 backedges. 0 proven. 9920 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:11:57,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:11:57,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201826823] [2022-04-06 20:11:57,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201826823] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:11:57,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639243644] [2022-04-06 20:11:57,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:11:57,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:11:57,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:11:57,944 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:11:57,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-04-06 20:11:58,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:11:58,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:11:58,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 873 conjuncts, 107 conjunts are in the unsatisfiable core [2022-04-06 20:11:58,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:11:58,409 INFO L134 CoverageAnalysis]: Checked inductivity of 9920 backedges. 0 proven. 9920 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:11:58,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:12:05,326 INFO L134 CoverageAnalysis]: Checked inductivity of 9920 backedges. 0 proven. 9920 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:12:05,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639243644] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:12:05,326 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:12:05,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 108, 108] total 208 [2022-04-06 20:12:05,327 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:12:05,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [578817952] [2022-04-06 20:12:05,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [578817952] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:12:05,327 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:12:05,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [109] imperfect sequences [] total 109 [2022-04-06 20:12:05,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336476331] [2022-04-06 20:12:05,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:12:05,327 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-04-06 20:12:05,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:12:05,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-04-06 20:12:05,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20515, Invalid=22541, Unknown=0, NotChecked=0, Total=43056 [2022-04-06 20:12:05,333 INFO L87 Difference]: Start difference. First operand 10389 states and 10579 transitions. Second operand has 109 states, 109 states have (on average 2.0091743119266057) internal successors, (219), 107 states have internal predecessors, (219), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:12:21,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:12:21,780 INFO L93 Difference]: Finished difference Result 10600 states and 10888 transitions. [2022-04-06 20:12:21,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-04-06 20:12:21,780 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 2.0091743119266057) internal successors, (219), 107 states have internal predecessors, (219), 2 states have call successors, (3), 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 223 [2022-04-06 20:12:21,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:12:21,793 INFO L225 Difference]: With dead ends: 10600 [2022-04-06 20:12:21,793 INFO L226 Difference]: Without dead ends: 10393 [2022-04-06 20:12:21,798 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 661 GetRequests, 347 SyntacticMatches, 2 SemanticMatches, 312 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7379 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=41638, Invalid=56644, Unknown=0, NotChecked=0, Total=98282 [2022-04-06 20:12:21,798 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1790 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 691 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1790 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 691 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:12:21,798 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1790 Valid, 40 Invalid, 1368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [691 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:12:21,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10393 states. [2022-04-06 20:12:32,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10393 to 10378. [2022-04-06 20:12:32,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10378 states, 10373 states have (on average 1.0182203798322569) internal successors, (10562), 10373 states have internal predecessors, (10562), 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) [2022-04-06 20:12:32,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10378 states to 10378 states and 10566 transitions. [2022-04-06 20:12:32,033 INFO L78 Accepts]: Start accepts. Automaton has 10378 states and 10566 transitions. Word has length 223 [2022-04-06 20:12:32,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:12:32,033 INFO L478 AbstractCegarLoop]: Abstraction has 10378 states and 10566 transitions. [2022-04-06 20:12:32,033 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 2.0091743119266057) internal successors, (219), 107 states have internal predecessors, (219), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:12:32,033 INFO L276 IsEmpty]: Start isEmpty. Operand 10378 states and 10566 transitions. [2022-04-06 20:12:32,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2022-04-06 20:12:32,041 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:12:32,041 INFO L499 BasicCegarLoop]: trace histogram [100, 99, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:12:32,057 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2022-04-06 20:12:32,253 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:12:32,253 INFO L403 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:12:32,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:12:32,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1695710493, now seen corresponding path program 9 times [2022-04-06 20:12:32,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:12:32,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [400159562] [2022-04-06 20:12:32,254 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:12:32,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1695710493, now seen corresponding path program 10 times [2022-04-06 20:12:32,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:12:32,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310458169] [2022-04-06 20:12:32,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:12:32,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:12:32,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:35,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:12:35,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:35,598 INFO L134 CoverageAnalysis]: Checked inductivity of 9930 backedges. 0 proven. 9930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:12:35,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:12:35,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310458169] [2022-04-06 20:12:35,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310458169] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:12:35,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127767540] [2022-04-06 20:12:35,599 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:12:35,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:12:35,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:12:35,600 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:12:35,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-04-06 20:12:35,715 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:12:35,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:12:35,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 879 conjuncts, 108 conjunts are in the unsatisfiable core [2022-04-06 20:12:35,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:12:35,948 INFO L134 CoverageAnalysis]: Checked inductivity of 9930 backedges. 0 proven. 9930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:12:35,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:12:41,280 INFO L134 CoverageAnalysis]: Checked inductivity of 9930 backedges. 0 proven. 9930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:12:41,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127767540] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:12:41,281 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:12:41,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 109, 109] total 208 [2022-04-06 20:12:41,281 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:12:41,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [400159562] [2022-04-06 20:12:41,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [400159562] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:12:41,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:12:41,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2022-04-06 20:12:41,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180492639] [2022-04-06 20:12:41,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:12:41,281 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-04-06 20:12:41,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:12:41,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-04-06 20:12:41,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20515, Invalid=22541, Unknown=0, NotChecked=0, Total=43056 [2022-04-06 20:12:41,286 INFO L87 Difference]: Start difference. First operand 10378 states and 10566 transitions. Second operand has 110 states, 110 states have (on average 2.0090909090909093) internal successors, (221), 108 states have internal predecessors, (221), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:12:58,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:12:58,127 INFO L93 Difference]: Finished difference Result 10590 states and 10876 transitions. [2022-04-06 20:12:58,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-04-06 20:12:58,128 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.0090909090909093) internal successors, (221), 108 states have internal predecessors, (221), 2 states have call successors, (3), 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 225 [2022-04-06 20:12:58,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:12:58,140 INFO L225 Difference]: With dead ends: 10590 [2022-04-06 20:12:58,140 INFO L226 Difference]: Without dead ends: 10383 [2022-04-06 20:12:58,145 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 667 GetRequests, 352 SyntacticMatches, 2 SemanticMatches, 313 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7489 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=41841, Invalid=57069, Unknown=0, NotChecked=0, Total=98910 [2022-04-06 20:12:58,146 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1546 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 616 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1546 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 616 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:12:58,146 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1546 Valid, 50 Invalid, 1304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [616 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:12:58,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10383 states. [2022-04-06 20:13:08,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10383 to 10365. [2022-04-06 20:13:08,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10365 states, 10360 states have (on average 1.018050193050193) internal successors, (10547), 10360 states have internal predecessors, (10547), 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) [2022-04-06 20:13:08,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10365 states to 10365 states and 10551 transitions. [2022-04-06 20:13:08,262 INFO L78 Accepts]: Start accepts. Automaton has 10365 states and 10551 transitions. Word has length 225 [2022-04-06 20:13:08,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:13:08,262 INFO L478 AbstractCegarLoop]: Abstraction has 10365 states and 10551 transitions. [2022-04-06 20:13:08,262 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 2.0090909090909093) internal successors, (221), 108 states have internal predecessors, (221), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:13:08,262 INFO L276 IsEmpty]: Start isEmpty. Operand 10365 states and 10551 transitions. [2022-04-06 20:13:08,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2022-04-06 20:13:08,269 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:13:08,269 INFO L499 BasicCegarLoop]: trace histogram [100, 99, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:13:08,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2022-04-06 20:13:08,485 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2022-04-06 20:13:08,485 INFO L403 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:13:08,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:13:08,486 INFO L85 PathProgramCache]: Analyzing trace with hash -186694296, now seen corresponding path program 11 times [2022-04-06 20:13:08,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:13:08,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [96375930] [2022-04-06 20:13:08,486 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:13:08,486 INFO L85 PathProgramCache]: Analyzing trace with hash -186694296, now seen corresponding path program 12 times [2022-04-06 20:13:08,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:13:08,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480101709] [2022-04-06 20:13:08,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:13:08,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:13:08,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:13:11,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:13:11,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:13:11,354 INFO L134 CoverageAnalysis]: Checked inductivity of 9942 backedges. 0 proven. 9942 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:13:11,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:13:11,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480101709] [2022-04-06 20:13:11,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480101709] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:13:11,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12745791] [2022-04-06 20:13:11,355 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:13:11,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:13:11,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:13:11,356 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:13:11,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-04-06 20:13:11,547 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 100 check-sat command(s) [2022-04-06 20:13:11,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:13:11,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 885 conjuncts, 109 conjunts are in the unsatisfiable core [2022-04-06 20:13:11,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:13:11,782 INFO L134 CoverageAnalysis]: Checked inductivity of 9942 backedges. 0 proven. 9942 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:13:11,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:13:17,461 INFO L134 CoverageAnalysis]: Checked inductivity of 9942 backedges. 0 proven. 9942 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:13:17,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12745791] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:13:17,462 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:13:17,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 110, 110] total 208 [2022-04-06 20:13:17,462 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:13:17,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [96375930] [2022-04-06 20:13:17,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [96375930] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:13:17,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:13:17,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [111] imperfect sequences [] total 111 [2022-04-06 20:13:17,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349709648] [2022-04-06 20:13:17,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:13:17,462 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-04-06 20:13:17,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:13:17,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-04-06 20:13:17,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20515, Invalid=22541, Unknown=0, NotChecked=0, Total=43056 [2022-04-06 20:13:17,470 INFO L87 Difference]: Start difference. First operand 10365 states and 10551 transitions. Second operand has 111 states, 111 states have (on average 2.009009009009009) internal successors, (223), 109 states have internal predecessors, (223), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:13:34,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:13:34,214 INFO L93 Difference]: Finished difference Result 10578 states and 10862 transitions. [2022-04-06 20:13:34,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-04-06 20:13:34,214 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 2.009009009009009) internal successors, (223), 109 states have internal predecessors, (223), 2 states have call successors, (3), 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 227 [2022-04-06 20:13:34,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:13:34,224 INFO L225 Difference]: With dead ends: 10578 [2022-04-06 20:13:34,225 INFO L226 Difference]: Without dead ends: 10371 [2022-04-06 20:13:34,230 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 673 GetRequests, 357 SyntacticMatches, 2 SemanticMatches, 314 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7600 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=42044, Invalid=57496, Unknown=0, NotChecked=0, Total=99540 [2022-04-06 20:13:34,231 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1946 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 754 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1946 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 754 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:13:34,231 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1946 Valid, 50 Invalid, 1443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [754 Valid, 689 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:13:34,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10371 states. [2022-04-06 20:13:44,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10371 to 10350. [2022-04-06 20:13:44,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10350 states, 10345 states have (on average 1.0178830352827453) internal successors, (10530), 10345 states have internal predecessors, (10530), 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) [2022-04-06 20:13:44,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10350 states to 10350 states and 10534 transitions. [2022-04-06 20:13:44,126 INFO L78 Accepts]: Start accepts. Automaton has 10350 states and 10534 transitions. Word has length 227 [2022-04-06 20:13:44,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:13:44,126 INFO L478 AbstractCegarLoop]: Abstraction has 10350 states and 10534 transitions. [2022-04-06 20:13:44,127 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 2.009009009009009) internal successors, (223), 109 states have internal predecessors, (223), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:13:44,127 INFO L276 IsEmpty]: Start isEmpty. Operand 10350 states and 10534 transitions. [2022-04-06 20:13:44,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2022-04-06 20:13:44,134 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:13:44,134 INFO L499 BasicCegarLoop]: trace histogram [100, 99, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:13:44,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2022-04-06 20:13:44,346 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2022-04-06 20:13:44,346 INFO L403 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:13:44,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:13:44,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1721075027, now seen corresponding path program 13 times [2022-04-06 20:13:44,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:13:44,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1851068874] [2022-04-06 20:13:44,347 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:13:44,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1721075027, now seen corresponding path program 14 times [2022-04-06 20:13:44,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:13:44,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974108964] [2022-04-06 20:13:44,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:13:44,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:13:44,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:13:47,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:13:47,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:13:47,546 INFO L134 CoverageAnalysis]: Checked inductivity of 9956 backedges. 0 proven. 9956 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:13:47,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:13:47,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974108964] [2022-04-06 20:13:47,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974108964] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:13:47,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731761226] [2022-04-06 20:13:47,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:13:47,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:13:47,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:13:47,548 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:13:47,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-04-06 20:13:47,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:13:47,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:13:47,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 891 conjuncts, 110 conjunts are in the unsatisfiable core [2022-04-06 20:13:47,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:13:48,088 INFO L134 CoverageAnalysis]: Checked inductivity of 9956 backedges. 0 proven. 9956 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:13:48,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:13:54,981 INFO L134 CoverageAnalysis]: Checked inductivity of 9956 backedges. 0 proven. 9956 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:13:54,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731761226] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:13:54,981 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:13:54,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 111, 111] total 208 [2022-04-06 20:13:54,982 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:13:54,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1851068874] [2022-04-06 20:13:54,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1851068874] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:13:54,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:13:54,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [112] imperfect sequences [] total 112 [2022-04-06 20:13:54,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668860306] [2022-04-06 20:13:54,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:13:54,983 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-04-06 20:13:54,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:13:54,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-04-06 20:13:54,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20515, Invalid=22541, Unknown=0, NotChecked=0, Total=43056 [2022-04-06 20:13:54,987 INFO L87 Difference]: Start difference. First operand 10350 states and 10534 transitions. Second operand has 112 states, 112 states have (on average 2.0089285714285716) internal successors, (225), 110 states have internal predecessors, (225), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:14:11,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:14:11,825 INFO L93 Difference]: Finished difference Result 10564 states and 10846 transitions. [2022-04-06 20:14:11,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-04-06 20:14:11,825 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 2.0089285714285716) internal successors, (225), 110 states have internal predecessors, (225), 2 states have call successors, (3), 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 229 [2022-04-06 20:14:11,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:14:11,834 INFO L225 Difference]: With dead ends: 10564 [2022-04-06 20:14:11,835 INFO L226 Difference]: Without dead ends: 10357 [2022-04-06 20:14:11,839 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 679 GetRequests, 362 SyntacticMatches, 2 SemanticMatches, 315 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7712 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=42247, Invalid=57925, Unknown=0, NotChecked=0, Total=100172 [2022-04-06 20:14:11,839 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1713 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 679 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1713 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 1350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 679 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:14:11,839 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1713 Valid, 35 Invalid, 1350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [679 Valid, 671 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:14:11,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10357 states. [2022-04-06 20:14:21,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10357 to 10333. [2022-04-06 20:14:21,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10333 states, 10328 states have (on average 1.0177188226181255) internal successors, (10511), 10328 states have internal predecessors, (10511), 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) [2022-04-06 20:14:21,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10333 states to 10333 states and 10515 transitions. [2022-04-06 20:14:21,505 INFO L78 Accepts]: Start accepts. Automaton has 10333 states and 10515 transitions. Word has length 229 [2022-04-06 20:14:21,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:14:21,505 INFO L478 AbstractCegarLoop]: Abstraction has 10333 states and 10515 transitions. [2022-04-06 20:14:21,505 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 2.0089285714285716) internal successors, (225), 110 states have internal predecessors, (225), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:14:21,505 INFO L276 IsEmpty]: Start isEmpty. Operand 10333 states and 10515 transitions. [2022-04-06 20:14:21,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2022-04-06 20:14:21,512 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:14:21,512 INFO L499 BasicCegarLoop]: trace histogram [100, 99, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:14:21,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2022-04-06 20:14:21,723 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:14:21,723 INFO L403 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:14:21,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:14:21,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1207792306, now seen corresponding path program 15 times [2022-04-06 20:14:21,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:14:21,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2014620764] [2022-04-06 20:14:21,726 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:14:21,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1207792306, now seen corresponding path program 16 times [2022-04-06 20:14:21,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:14:21,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961339445] [2022-04-06 20:14:21,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:14:21,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:14:21,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:14:24,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:14:24,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:14:24,404 INFO L134 CoverageAnalysis]: Checked inductivity of 9972 backedges. 0 proven. 9972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:14:24,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:14:24,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961339445] [2022-04-06 20:14:24,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961339445] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:14:24,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317419584] [2022-04-06 20:14:24,405 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:14:24,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:14:24,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:14:24,406 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:14:24,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-04-06 20:14:24,519 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:14:24,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:14:24,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 897 conjuncts, 111 conjunts are in the unsatisfiable core [2022-04-06 20:14:24,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:14:24,763 INFO L134 CoverageAnalysis]: Checked inductivity of 9972 backedges. 0 proven. 9972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:14:24,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:14:29,894 INFO L134 CoverageAnalysis]: Checked inductivity of 9972 backedges. 0 proven. 9972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:14:29,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317419584] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:14:29,894 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:14:29,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [113, 112, 112] total 208 [2022-04-06 20:14:29,895 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:14:29,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2014620764] [2022-04-06 20:14:29,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2014620764] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:14:29,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:14:29,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [113] imperfect sequences [] total 113 [2022-04-06 20:14:29,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530633833] [2022-04-06 20:14:29,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:14:29,895 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-04-06 20:14:29,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:14:29,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-04-06 20:14:29,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20515, Invalid=22541, Unknown=0, NotChecked=0, Total=43056 [2022-04-06 20:14:29,899 INFO L87 Difference]: Start difference. First operand 10333 states and 10515 transitions. Second operand has 113 states, 113 states have (on average 2.0088495575221237) internal successors, (227), 111 states have internal predecessors, (227), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)